Driver attach error

driver attach error

Another option you had was only importing the drivers at the time. After importing device drivers into the catalog, add them to driver packages. Failed to add driver package: The system cannot find the file specified. Total driver packages: 1. Added driver packages: 0. 11/17/2021 7:53:06 PM. To resolve this issue check the /usr/lib/python2.7/dist-packages/cinder/volume/drivers/emc and ensure that the files have the correct dates for.

Driver attach error - apologise, but

Attaching and Detaching

The attach(9E) entry point first calls the ddi_get_instance(9F) function to retrieve the instance number of the device information node. The attach(9E) entry point uses this instance number to call the ddi_soft_state_zalloc(9F), ddi_get_soft_state(9F), and ddi_create_minor_node(9F) functions.

The attach(9E) entry point calls the ddi_soft_state_zalloc(9F) function to create a state structure for this device instance. If creation of the soft state structure fails, attach(9E) writes an error message to a system log and returns failure. This device instance is not attached. If creation of the soft state structure succeeds, attach(9E) calls the ddi_get_soft_state(9F) function to retrieve the state structure for this device instance.

If retrieval of the state structure fails, attach(9E) writes an error message to a system log, calls the ddi_soft_state_free(9F) function to destroy the state structure that was created by ddi_soft_state_zalloc(9F), and returns failure. This device instance is not attached. If retrieval of the state structure succeeds, attach(9E) calls the ddi_create_minor_node(9F) function to create the device node.

At the top of this driver source file, a constant named is defined that holds the string name of the device. This constant is one of the arguments that is passed to ddi_create_minor_node(9F). If creation of the device node fails, attach(9E) writes an error message to a system log, calls the ddi_soft_state_free(9F) function to destroy the state structure that was created by ddi_soft_state_zalloc(9F), calls the ddi_remove_minor_node(9F) function, and returns failure. This device instance is not attached.

If creation of the device node succeeds, this device instance is attached. The attach(9E) entry point assigns the instance number that was retrieved with ddi_get_instance(9F) to the instance member of the state structure for this instance. Then attach(9E) assigns the structure pointer that was passed in the attach(9E) call to the structure pointer member of the state structure for this instance. The ddi_report_dev(9F) function writes a message in the system log file when the device is added or when the system is booted. The message announces this device as shown in the following example:


% pseudo: [ID 129642 kern.info] pseudo-device: qotd_20 genunix: [ID 936769 kern.info] qotd_20 is /pseudo/[email protected]

The detach(9E) entry point first calls the ddi_get_instance(9F) function to retrieve the instance number of the device information node. The detach(9E) entry point uses this instance number to call the ddi_soft_state_free(9F) function to destroy the state structure that was created by ddi_soft_state_zalloc(9F) in the attach(9E) entry point. The detach(9E) entry point then calls the ddi_remove_minor_node(9F) function to remove the device that was created by ddi_create_minor_node(9F) in the attach(9E) entry point.

  • © 2010, Oracle Corporation and/or its affiliates
DDI_FM_ERRCB_CAP(bgep->fm_capabilities)) pci_ereport_setup(bgep->devinfo); /* * Register error callback if error callback capable */ if (DDI_FM_ERRCB_CAP(bgep->fm_capabilities)) ddi_fm_handler_register(bgep->devinfo, bge_fm_error_cb, (void*) bgep); } else { /* * These fields have to be cleared of FMA if there are no * FMA capabilities at runtime. */ bge_reg_accattr.devacc_attr_access = DDI_DEFAULT_ACC; dma_attr.dma_attr_flags = 0; } }

Cleaning Up Fault Management Resources

The ddi_fm_fini(9F) function cleans up resources allocated to support fault management for .

void ddi_fm_fini(dev_info_t *)

The function can be called from kernel context in a driver attach(9E) or detach(9E) entry point.

The following example from the driver shows the function, which calls the (9F) function. The function is called in the function, which is called in both the and functions.

static void bge_fm_fini(bge_t *bgep) { /* Only unregister FMA capabilities if we registered some */ if (bgep->fm_capabilities) { /* * Release any resources allocated by pci_ereport_setup() */ if (DDI_FM_EREPORT_CAP(bgep->fm_capabilities)

Error Handling

This section describes how to use I/O fault services APIs to handle errors within a driver. This section discusses how drivers should indicate and initialize their fault management capabilities, generate error reports, and register the driver's error handler routine.

Excerpts are provided from source code examples that demonstrate the use of the I/O fault services API from the Broadcom 1Gb NIC driver, . Follow these examples as a model for how to integrate fault management capability into your own drivers. Take the following steps to study the complete driver code:

Drivers that have been instrumented to provide FMA error report telemetry detect errors and determine the impact of those errors on the services provided by the driver. Following the detection of an error, the driver should determine when its services have been impacted and to what degree.

An I/O driver must respond immediately to detected errors. Appropriate responses include:

  • Attempt recovery

  • Retry an I/O transaction

  • Attempt fail-over techniques

  • Report the error to the calling application/stack

  • If the error cannot be constrained any other way, then panic

Errors detected by the driver are communicated to the fault management daemon as an ereport. An ereport is a structured event defined by the FMA event protocol. The event protocol is a specification for a set of common data fields that must be used to describe all possible error and fault events, in addition to the list of suspected faults. Ereports are gathered into a flow of error telemetry and dispatched to the diagnosis engine.

Declaring Fault Management Capabilities

A hardened device driver must declare its fault management capabilities to the I/O Fault Management framework. Use the ddi_fm_init(9F) function to declare the fault management capabilities of your driver.

void ddi_fm_init(dev_info_t *, int *, ddi_iblock_cookie_t *)

The function can be called from kernel context in a driver attach(9E) or detach(9E) entry point. The function usually is called from the entry point. The function allocates and initializes resources according to . The parameter must be set to the bitwise-inclusive-OR of the following fault management capabilities:

  • - Driver is responsible for and capable of generating FMA protocol error events (ereports) upon detection of an error condition.

  • - Driver is responsible for and capable of checking for errors upon completion of one or more access I/O transactions.

  • - Driver is responsible for and capable of checking for errors upon completion of one or more DMA I/O transactions.

  • - Driver has an error callback function.

A hardened leaf driver generally sets all these capabilities. However, if its parent nexus is not capable of supporting any one of the requested capabilities, the associated bit is cleared and returned as such to the driver. Before returning from (9F), the I/O fault services framework creates a set of fault management capability properties: , , and . The currently supported fault management capability level is observable by using the prtconf(1M) command.

To make your driver support administrative selection of fault management capabilities, export and set the fault management capability level properties to the values described above in the driver.conf(4) file. The properties must be set and read prior to calling with the desired capability list.

The following example from the driver shows the function, which calls the (9F) function. The function is called in the function.

static void bge_fm_init(bge_t *bgep) { ddi_iblock_cookie_t iblk; /* Only register with IO Fault Services if we have some capability */ if (bgep->fm_capabilities) { bge_reg_accattr.devacc_attr_access = DDI_FLAGERR_ACC; dma_attr.dma_attr_flags = DDI_DMA_FLAGERR; /* * Register capabilities with IO Fault Services */ ddi_fm_init(bgep->devinfo, &bgep->fm_capabilities, &iblk); /* * Initialize pci ereport capabilities if ereport capable */ if (DDI_FM_EREPORT_CAP(bgep->fm_capabilities)

How do I troubleshoot issues with my EBS volume mounts in Amazon EKS?

I'm receiving the following error in my pods when mounting Amazon Elastic Block Store (Amazon EBS) volumes in my Amazon Elastic Kubernetes Service (Amazon EKS) cluster:

"Timeout expired waiting for volumes to attach or mount for pod"

How do I troubleshoot this?

Resolution

Before you begin the following troubleshooting steps, verify that you have the following:

  • The required AWS Identity and Access Management (IAM) permissions for your "ebs-csi-controller-sa" service account IAM role.
  • A valid PersistentVolumeClaim (PVC) is present in the same namespace as the pod.
  • A valid EBS storage class definition using the in-tree provisioner "kubernetes.io/aws-ebs" or the Amazon EBS Container Storage Interface (CSI) driver provisioner "ebs.csi.aws.com".

Verify that the Amazon EBS CSI driver controller and node pods are running

The Amazon EBS CSI driver consists of controller pods that run as a deployment and node pods that run as a daemonset. Run the following commands to verify if these pods are running in your cluster:

Verify if the PVC encountered issues while binding to the EBS persistent volume

To verify if the PVC encountered issues, run the following command to view events. In the following example command, replace pvc-name and namespace with the correct values for your environment.

If you're using dynamic volume provisioning, review the returned events to determine if volume provisioning succeeded or failed. You can also see the corresponding persistent volume name that the PVC is bound to, as shown in the following example:

If the provisioning failed, find the error message in events.

Review the Amazon EBS CSI controller pods' logs

Check the controller pod logs to understand the cause of the mount failures. If the volume is failing during creation, refer to the ebs-plugin and csi-provisioner logs. Run the following commands to retrieve the ebs-plugin container logs:

Run the following command to retrieve the csi-provisioner container logs:

If the EBS volumes are failing to attach to the pod, review the csi-attacher logs to understand why. Run the following command to retrieve the csi-attacher container logs:

Verify that the Amazon EBS CSI driver controller service account is annotated with the correct IAM role and that the IAM role has the required permissions

Unauthorized errors in your PVC events or in your ebs-csi-controller logs are caused by the following:

1.    Run the following command to determine if the service account used by ebs-csi-controller pods has the correct annotation:

Verify that the following annotation is present:

2.    Verify that the IAM OIDC provider for the cluster is created, and that the IAM role has the required permissions to perform EBS API calls. Also, verify that the IAM role's trust policy trusts the service account ebs-csi-controller-sa.

3.    Review your account's AWS CloudTrail logs to verify that the CreateVolume, AttachVolume, and DetachVolume calls are being made. Also review the CloudTrail logs to determine which principal made the calls. This information helps you determine if the service account IAM role is being used by the controller or the worker node IAM role.

Verify the persistent volume's node affinity

Each persistent volume is created with a node affinity limiting attachment of persistent volumes to nodes within a single Availability Zone. This is because EBS volumes can only be attached to pods or nodes running on the same Availability Zone that they were created in. If pods that are scheduled on to nodes in one Availability Zone try to use the EBS persistent volume in a different Availability Zone, you receive an error similar to the following:

To avoid this, use StatefulSets instead of Deployment, so that a unique EBS volume is created for each pod of the StatefulSets in the same Availability Zone as the pod.

You can verify the persistent volume's node affinity by running the following command. In the following example command, replace persistent-volume-name with your volume's name.

Note: Keep in mind that you can't mount an EBS volume to two different pods running on two different worker nodes. The EBS volume can be attached to pods running on one node but can't be attached to another node at the same time. If you try to attach your EBS volume to two different pods on different worker nodes, the pod fails and you receive an error similar to the following:

Make sure that your EBS controller pods have connectivity to the EC2 API

If you see errors indicating connection timeouts in the EBS-CSI-Controller logs, then the EBS CSI controller might not be connected to the EC2 API. If the controller pods have connectivity issues to the EC2 API, then you see an error similar to the following when creating your PVC:


vSphere CSI Driver - Known Issues

For complete list of issues please check our Github issues page. If you notice an issue not listed in Github issues page, please do file an issue on the Github repository.

Please refer to release notes to learn about known issues in each release.

Following listing is for issues observed in Kubernetes.

Multi-Attach error for RWO (Block) volume when Node VM is shutdown before Pods are evicted and Volumes are detached from Node VM

Note: This Issue is present in all Kubernetes Releases

  • Impact: After Node is shutdown, Pod running on that Node does not come up on the new Node. Events on the Pod will have a warning message for "FailedAttachVolume". Error Message:
  • Upstream Issue: Kubernetes is being enhanced to fix this issue. Here is the Kubernetes Enhancement Proposals (KEP) PR you can refer for more detail - kubernetes/enhancements#1116
  • Workaround:
    • Pods stuck in this state can be recovered by following steps.
      1. Find the Node VM in the vCenter Inventory. Make sure the correct VM associated with the Node is used for further instructions.
      2. Detach all Persistent Volumes Disk attached to this Node VM. Note: Do not detach Primary disks used by the Guest OS.
        1. Right-click a virtual machine in the inventory and select Edit Settings.
        2. From Virtual Hardware find all Hard Disks for Persistent Volumes and remove them. (Do not select - Delete files from datastore)
        3. Click on OK to reconfigure VM to detach all Persistent Volumes disks from shutdown/powered off Node VM.
      3. Execute and find all volumeattachments objects associated with shutdown Node VM.
      4. Edit object with and remove finalizers.
      5. Check if the object is deleted by Kubernetes. If this object remains on the system, you can safely delete this with .
      6. Wait for some time for Pod to come up on a new Node.

Performance regression in Kubernetes 1.17 and 1.18

  • Impact: Low throughput of attach and detach operations, especially at scale.
  • Upstream issue is tracked at: kubernetes/kubernetes#84169
  • Workaround:
    • Upgrade Kubernetes minor version to 1.17.8 and above or 1.18.5 and above. These versions contain the upstream fix for this issue.
    • If upgrading the Kubernetes version is not possible, then there is a workaround that can be applied on your Kubernetes cluster. On each primary node, perform the following steps:
      1. Open kube-controller-manager manifest, located at
      2. Add to spec.containers.command
      3. Since kube-controller-manager is a static pod, Kubelet will restart it whenever a new flag is added. Make sure the kube-controller-manager pod is up and running.

Volume resize incomplete if PVC is deleted before filesystem can be resized

  • Issue: Filesystem resize is skipped if the original PVC is deleted when FilesystemResizePending condition is still on the PVC, but PV and its associated volume on the storage system are not deleted due to the Retain policy. Refer to kubernetes/kubernetes#88683 for more details.
  • Impact: User may create a new PVC to statically bind to the undeleted PV. In this case, the volume on the storage system is resized but the filesystem is not resized accordingly. User may try to write to the volume whose filesystem is out of capacity.
  • Workaround: User can log into the container to manually resize the filesystem.

Volume associated with a Statefulset cannot be resized

  • Issue: kubernetes/enhancements#661
  • Impact: User cannot resize volume in a StatefulSet.
  • Workaround:
    • Upstream solution is being tracked at kubernetes/enhancements#2842.
    • If the statefulset is not managed by an operator, there is a slightly risky workaround which the user can use on their own discretion depending upon their use case. Please refer to https://serverfault.com/a/989665 for more details. Kindly note that VMware does not support this option.

Recovery from volume expansion failure

Error Handling

This section describes how to use I/O fault services APIs to handle errors within a driver. This section discusses how drivers should indicate and initialize their fault management capabilities, generate error reports, and register the driver's error handler routine.

Excerpts are provided from source code examples that demonstrate the use of the I/O fault services API from the Broadcom 1Gb NIC driver. Follow these examples as a model for how to integrate fault management capability into your own drivers, driver attach error. Take the following steps to study the complete driver code:

Drivers that have been instrumented to provide FMA error report telemetry detect errors and determine the impact of those errors on the services provided by the driver. Following the detection of an error, the driver should determine when its services have been impacted and to what degree.

An I/O driver must respond immediately to detected errors. Appropriate responses include:

  • Attempt recovery

  • Retry an I/O transaction

  • Attempt fail-over techniques

  • Report the error to the calling application/stack

  • If the error cannot be constrained any other way, then panic

Errors detected by the driver are communicated to the fault management daemon as an ereport. An ereport is a structured event defined by the FMA event protocol, driver attach error. The event protocol is a specification for a set of common data fields that must be used to describe all possible error and fault events, in addition to the list of suspected faults. Ereports are gathered into a flow of error telemetry and dispatched to the diagnosis engine.

Declaring Fault Management Capabilities

A hardened device driver must declare its fault management capabilities to the I/O Fault Management framework. Use the ddi_fm_init(9F) function to declare the fault management capabilities of your driver.

void ddi_fm_init(dev_info_t *, int *, ddi_iblock_cookie_t *)

The function can be called from kernel context in a driver attach(9E) or detach(9E) entry point. The function usually is called from the entry point. The function allocates and initializes resources according to. The parameter must be set to the bitwise-inclusive-OR of the following fault management capabilities:

  • - Driver is responsible for and capable of generating FMA protocol error events (ereports) upon detection of an error condition.

  • - Driver is responsible for and capable of checking for errors upon completion of one or more access I/O transactions.

  • - Driver is responsible for and capable driver attach error checking for errors upon completion of one or more DMA I/O transactions.

  • - Driver has an error callback function.

A hardened leaf driver generally sets all these capabilities, driver attach error. However, if its parent nexus is not capable of supporting any one of the requested capabilities, the associated bit is cleared and returned as such to the driver. Before returning from (9F), the I/O fault services framework creates a set of fault management capability properties:, and. The currently supported fault management capability level is observable by using the prtconf(1M) command.

To make your driver support administrative selection of fault management capabilities, export and set the fault management capability level properties to the values described above in the driver.conf(4) driver attach error. The properties must be set and read prior to calling with the desired capability list.

The following example from the driver shows the function, which calls the (9F) function, driver attach error. The function is called in the function.

static void bge_fm_init(bge_t *bgep) { ddi_iblock_cookie_t iblk; /* Only register with IO Fault Services if we have some capability */ if (bgep->fm_capabilities) { bge_reg_accattr.devacc_attr_access = DDI_FLAGERR_ACC; dma_attr.dma_attr_flags driver attach error DDI_DMA_FLAGERR; /* * Register capabilities with IO Fault Services */ ddi_fm_init(bgep->devinfo, &bgep->fm_capabilities, &iblk); driver attach error /* * Initialize pci ereport capabilities if ereport capable */ if (DDI_FM_EREPORT_CAP(bgep->fm_capabilities) DDI_FM_ERRCB_CAP(bgep->fm_capabilities)) pci_ereport_teardown(bgep->devinfo); /* * Un-register error callback if error callback capable */ if (DDI_FM_ERRCB_CAP(bgep->fm_capabilities)) ddi_fm_handler_unregister(bgep->devinfo); /* * Unregister from IO Fault Services */ ddi_fm_fini(bgep->devinfo); } }

Getting the Fault Management Capability Bit Mask

The ddi_fm_capable(9F) function returns the capability bit mask currently set for .

void ddi_fm_capable(dev_info_t *)

Reporting Errors

This section provides information about the following topics:

Queueing an Error Event

The ddi_fm_ereport_post(9F) function causes an ereport event to be queued for delivery to the fault manager daemon, fmd(1M).

void ddi_fm_ereport_post(dev_info_t *, const char *, uint64_t int.)

The parameter indicates whether the caller is willing to wait for system memory and event channel resources to become available.

The ENA indicates the Error Numeric Association (ENA) for this error report. The ENA might have been driver attach error and obtained from another error detecting software module such as a bus nexus driver. If the ENA is set to 0, it will be initialized by .

The name-value pair () variable argument list contains one or more name, type, driver attach error, value pointer tuples for non-array types or one or more name, type, number of element, value pointer tuples for array types. The tuples make up the ereport event payload required for diagnosis. The end of the argument list is specified by .

The ereport class names and payloads described in Reporting Standard I/O Controller Errors for I/O controllers are used as appropriate for. Other ereport class names and payloads can be defined, but they must be registered in the Oracle event registry and accompanied by driver specific diagnosis engine software, or the Eversholt fault tree (eft) rules.

void bge_fm_ereport(bge_t *bgep, char *detail) { uint64_t ena; char buf[FM_MAX_CLASS]; (void) snprintf(buf, FM_MAX_CLASS, "%s.%s", DDI_FM_DEVICE, detail); ena = fm_ena_generate(0, FM_ENA_FMT1); if (DDI_FM_EREPORT_CAP(bgep->fm_capabilities)) { ddi_fm_ereport_post(bgep->devinfo, buf, ena, DDI_NOSLEEP, FM_VERSION, driver attach error, DATA_TYPE_UINT8, FM_EREPORT_VERS0, NULL); } }

Detecting and Reporting PCI-Related Errors

PCI-related errors, including PCI, PCI-X, and PCI-E, are automatically detected and reported when you use pci_ereport_post(9F).

void pci_ereport_post(dev_info_t *, ddi_fm_error_t *, uint16_t *)

Drivers do not need to generate driver-specific ereports for errors that occur in the PCI Local Bus configuration status registers. The function can report data parity errors, driver attach error, master aborts, target aborts, signaled system errors, and much more.

If is to be used by a driver, then pci_ereport_setup(9F) must have been previously called during the driver's (9E) routine, and pci_ereport_teardown(9F) must subsequently be called during the driver's (9E) routine.

The code samples below show the driver invoking the function from the driver's error handler.

/* * The I/O fault service error handling callback function */ /*ARGSUSED*/ static int bge_fm_error_cb(dev_info_t *dip, ddi_fm_error_t *err, const void *impl_data) { /* * as the driver can always deal with an error * in any dma or access handle, we can just return * the fme_status value. */ pci_ereport_post(dip, err, NULL); return (err->fme_status); }

Reporting Standard I/O Controller Errors

A standard set of device ereports is defined for commonly seen errors for I/O controllers. These ereports should be generated whenever one of the error symptoms described in this section is detected.

The ereports described in this section are dispatched for diagnosis to the eft diagnosis engine, which uses a common set of standard rules to diagnose them. Any other errors detected by device drivers must be defined as ereport events in the Sun driver attach error registry and must be accompanied by device specific diagnosis software or eft rules.

DDI_FM_DEVICE_INVAL_STATE

The driver has detected that the device is in an invalid state.

A driver should post an error when it detects that the data it transmits or receives appear to be invalid. For example, in the code, the and routines generate the error when these routines detect invalid data.

/* * The SEND INDEX registers should be reset to zero by the * global chip reset; if they're not, there'll be trouble * later on. */ sx0 = bge_reg_get32(bgep, NIC_DIAG_SEND_INDEX_REG(0)); if (sx0 != 0) { BGE_REPORT((bgep, "SEND INDEX - device didn't RESET")); bge_fm_ereport(bgep, DDI_FM_DEVICE_INVAL_STATE); return (DDI_FAILURE); } /* . */ /* * Sync (all) the receive ring descriptors * before accepting the packets they describe */ DMA_SYNC(rrp->desc, DDI_DMA_SYNC_FORKERNEL); if (*rrp->prod_index_p >= rrp->desc.nslots) { bgep->bge_chip_state = BGE_CHIP_ERROR; bge_fm_ereport(bgep, DDI_FM_DEVICE_INVAL_STATE); return (NULL); }
DDI_FM_DEVICE_INTERN_CORR

The device has reported a self-corrected internal error. For example, a correctable ECC error has been detected by the hardware in an internal buffer within the device.This error flag is not used in the driver.

DDI_FM_DEVICE_INTERN_UNCORR

The device has reported an uncorrectable internal error. For example, an uncorrectable ECC error has been detected by the hardware in an internal buffer within the device.

This error flag is not used in the driver.

DDI_FM_DEVICE_STALL

The driver has detected that data driver attach error has stalled unexpectedly.

The routine provides an example of stall detection.

dogval = bge_atomic_shl32(&bgep->watchdog, 1); if (dogval < bge_watchdog_count) return (B_FALSE); BGE_REPORT((bgep, "Tx stall detected, watchdog code 0x%x", dogval)); bge_fm_ereport(bgep, DDI_FM_DEVICE_STALL); return (B_TRUE);
DDI_FM_DEVICE_NO_RESPONSE

The device is not responding to a driver command.

bge_chip_poll_engine(bge_t *bgep, bge_regno_t regno, uint32_t mask, uint32_t val) { uint32_t regval; uint32_t n; for (n = 200; n; --n) { regval = bge_reg_get32(bgep, regno); if ((regval & mask) == val) return (B_TRUE); drv_usecwait(100); } bge_fm_ereport(bgep, DDI_FM_DEVICE_NO_RESPONSE); return (B_FALSE); }
DDI_FM_DEVICE_BADINT_LIMIT

The device has driver attach error too many consecutive invalid interrupts.

The routine within the driver provides an example of stuck interrupt detection. The function is a wrapper for the (9F) function. See the example in Queueing an Error Event.

if (bgep->missed_dmas >= bge_dma_miss_limit) { /* * If this happens multiple times in a row, * it means DMA is just not working. Maybe * the chip has failed, or maybe there's a * problem on the PCI bus or in the host-PCI * bridge (Tomatillo), driver attach error. * * At all events, we want to stop further * interrupts and let the recovery code take * over to see whether anything can be done * about it . */ bge_fm_ereport(bgep, DDI_FM_DEVICE_BADINT_LIMIT); driver attach error goto chip_stop; }

Service Impact Function

A fault management capable driver must indicate whether or not an error has impacted the services provided by a device. Following detection of an error and, if necessary, a shutdown of services, driver attach error, the driver should invoke the

  • © 2010, Oracle Corporation and/or its affiliates
DDI_FM_ERRCB_CAP(bgep->fm_capabilities)) pci_ereport_setup(bgep->devinfo); driver attach error /* * Register error callback if error callback capable */ if (DDI_FM_ERRCB_CAP(bgep->fm_capabilities)) ddi_fm_handler_register(bgep->devinfo, driver attach error, bge_fm_error_cb, (void*) bgep); } else { driver attach error /* * These fields have to be cleared of FMA if there are no * FMA capabilities at runtime. */ bge_reg_accattr.devacc_attr_access = DDI_DEFAULT_ACC; dma_attr.dma_attr_flags = 0; driver attach error } }

Cleaning Up Fault Management Resources

The ddi_fm_fini(9F) function cleans up resources allocated to support fault management for .

void ddi_fm_fini(dev_info_t *)

The function can be called from kernel context in a driver attach(9E) or detach(9E) driver attach error point.

The following example from driver attach error driver shows the function, which calls the (9F) function. The function is called in the function, which is called in both the and functions.

static void bge_fm_fini(bge_t *bgep) { /* Only unregister FMA capabilities if we registered some */ if (bgep->fm_capabilities) { /* * Release any resources allocated by pci_ereport_setup() */ if (DDI_FM_EREPORT_CAP(bgep->fm_capabilities)

Attaching and Detaching

The attach(9E) entry point first calls the ddi_get_instance(9F) function to retrieve the instance number of the device information node. The attach(9E) entry point uses this instance number to call the ddi_soft_state_zalloc(9F), ddi_get_soft_state(9F), driver attach error, and ddi_create_minor_node(9F) functions.

The attach(9E) entry point calls the ddi_soft_state_zalloc(9F) function to create a state structure for this device instance. If creation of the soft state structure fails, attach(9E) writes an error message to a system log and returns failure. This device instance is not attached. If creation of the soft state structure driver attach error, attach(9E) calls the ddi_get_soft_state(9F) function to retrieve the state structure for this device instance.

If retrieval of the state structure fails, attach(9E) writes an error message to a system log, calls the ddi_soft_state_free(9F) function to destroy the state structure that was created by ddi_soft_state_zalloc(9F), and returns failure, driver attach error. This device instance is not attached. If retrieval of the state structure succeeds, attach(9E) calls the ddi_create_minor_node(9F) function to create the device node.

At the top of this driver source file, a constant named is defined that holds the string name of the device. This constant is one of the arguments that is passed to ddi_create_minor_node(9F). If creation of the device node fails, attach(9E) writes an error message to a system log, calls the ddi_soft_state_free(9F) function to destroy the state structure that was created by ddi_soft_state_zalloc(9F), calls the ddi_remove_minor_node(9F) driver attach error, and returns failure. This device instance is not attached.

If creation of the device node succeeds, this device instance is attached. The attach(9E) entry point assigns the instance number that was retrieved with ddi_get_instance(9F) to the instance member of the state structure for this instance. Then attach(9E) assigns the structure pointer that was passed in the attach(9E) call to the structure pointer member of the state structure for this instance. The ddi_report_dev(9F) function writes a message in the system log file when the device is added or when the system is booted. The message announces this device as shown in the following example:


% pseudo: [ID 129642 kern.info] pseudo-device: qotd_20 genunix: [ID 936769 kern.info] qotd_20 is /pseudo/[email protected]

The detach(9E) entry point first calls the ddi_get_instance(9F) function to retrieve the instance number of the device information node. The detach(9E) entry point uses this instance number to call the ddi_soft_state_free(9F) function to destroy the state structure that was created by ddi_soft_state_zalloc(9F) in the attach(9E) entry point. The detach(9E) entry point then calls the ddi_remove_minor_node(9F) function to remove the device that was created by ddi_create_minor_node(9F) in the attach(9E) entry point.

  • © 2010, Oracle Corporation and/or its affiliates

[SOLVED] Camera Error Code 0xa00f4244 in Windows 10

If you can’t turn on your webcam or driver attach error successfully and get an error message saying “We can’t find your camera” in Windows 10, and the driver attach error code is 0xA00F4244, driver attach error, the cause might be antivirus software that’s blocking the webcam or camera, or the problematic camera drivers. To resolve the problem, you can try solutions in this post.

Solution 1: Make sure the camera app is turned on

Follow these steps: 

1. Press Win+I (Windows key and I key) at the same time to open Settings Window.
2, driver attach error. Click Privacy.

3, driver attach error. Click Camera in left pane. If it is off, turn it on. 

Solution 2: Check for antivirus software

You can disable the antivirus software temporarily and see if the camera works. If it works, the problem is caused by the antivirus software. If you don’t want to disable it or turn it off, in the antivirus software, you can check if there are settings related to blocking the access or permission to use the camera. If yes, change the settings. 

Solution 3: Check for camera drivers

The camera cannot work properly if there is problem with the camera driver. For many cases, updating driver would resolve the problem. But before that, ensure that your camera can work with the system version, driver attach error. To check this, follow these steps.

1. Go to Device Manager
2. Expand category Imaging devices. Mostly, driver attach error, the camera device can be found under this category. Right-click on the name of your camera, and then select Properties
Note that in Windows 10, some cameras/webcams may show up under “Sound, video and game controllers”). So if you don’t find your camera under Imaging devices, find it under “Sound, video and game controllers”.

If you don’t even see your camera show up in Device Manager, for external camera, try to plug it to another port. For integrated camera, update the motherboard drivers. 

3. Go to Driver tab and click Driver Details canon mx300 u051 error width="416" height="473" src="https://images.drivereasy.com/wp-content/uploads/2016/07/img_577a1f6f4b037.png" alt="">

4. In Driver File Details dialog box, look for a file name that includes stream.sys. If you find the file there, your camera was designed before Windows 7. In this case, you are required to replace it with a newer camera.

If you don’t find the stream.sys file, update the driver attach error drivers.

The steps above may resolve the driver attach error, but if they don’t, try to update the camera drivers. If you’re not confident playing around with drivers manually, you can do it automatically with Driver Easy.

Driver Easy will automatically recognize your system and find the correct drivers for it. You don’t need to know exactly what system your computer is running, driver attach error, you don’t need to risk downloading and installing the wrong driver, and you don’t need to worry about making a mistake when installing.

You can update your drivers automatically with either the FREE or the Pro version of Driver Easy, driver attach error. But with the Pro version it takes just 2 clicks (and you get full support and a 30-day money back guarantee):

1) Download and install Driver Easy.

2) Run Driver Easy and click Scan Now button. Driver Easy will then scan your computer and detect any problem drivers.

3) Click the Update button next to the camera driver to automatically download and install the correct version of this driver (you can do this with the FREE version), driver attach error. Or click Update All to automatically download and install the correct version of all the drivers that are missing or out of date on your system (this requires the Pro version – you’ll be prompted to upgrade when you click Update All).

The Pro version of Driver Easy comes with full technical support.
If you need assistance, please contact Driver Easy’s support team at [email protected]

Hopefully you find this article helpful. If you have any questions, ideas or suggestions, feel free to leave a comment below.

311

311 people found this helpful

driver attach error

watch the video

Cómo Reparar DRIVER_IRQL_NOT_LESS_OR_EQUAL en Windows 10/8/7 - 3 Soluciones

0 Comments

Leave a Comment