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megaraid_sas: do not process IOCTLs and SCSI commands during driver removal

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Do not process any SCSI and IOCTL command further (return them with
appropriate return values to callers), while driver removal is in
progress or PCI shutdown is invoked.

Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sumit.Saxena@avagotech.com 2014-11-17 15:24:08 +05:30 committed by Christoph Hellwig
parent 6e755ddc29
commit aa00832b4c
1 changed files with 15 additions and 4 deletions
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19
drivers/scsi/megaraid/megaraid_sas_base.c
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@ -1571,6 +1571,12 @@ megasas_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
instance = (struct megasas_instance *)
scmd->device->host->hostdata;
if (instance->unload == 1) {
scmd->result = DID_NO_CONNECT << 16;
scmd->scsi_done(scmd);
return 0;
}
if (instance->issuepend_done == 0)
return SCSI_MLQUEUE_HOST_BUSY;
@ -5011,10 +5017,6 @@ static int megasas_io_attach(struct megasas_instance *instance)
return -ENODEV;
}
/*
* Trigger SCSI to scan our drives
*/
scsi_scan_host(host);
return 0;
}
@ -5344,6 +5346,10 @@ retry_irq_register:
goto fail_io_attach;
instance->unload = 0;
/*
* Trigger SCSI to scan our drives
*/
scsi_scan_host(host);
/*
* Initiate AEN (Asynchronous Event Notification)
@ -6107,6 +6113,11 @@ megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
megasas_issue_blocked_cmd(instance, cmd, 0);
cmd->sync_cmd = 0;
if (instance->unload == 1) {
dev_info(&instance->pdev->dev, "Driver unload is in progress "
"don't submit data to application\n");
goto out;
}
/*
* copy out the kernel buffers to user buffers
*/