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qla2xxx: Check for device state before unloading the driver.

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During hot swap of PCI device, there can be PCI error on device,
during normal driver unload. The race between normal driver unload and
driver unload due to PCI error, can lead to system crash.Fix is to check
if there is unload going on and allow that function to unload the driver.

Signed-off-by: Sawan Chandak <sawan.chandak@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Sawan Chandak
2016-07-06 11:14:25 -04:00
committed by Martin K. Petersen
parent c6dc99058e
commit 783e0dc4f6
4 changed files with 52 additions and 13 deletions
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drivers/scsi/qla2xxx/qla_def.h
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@@ -3658,6 +3658,7 @@ typedef struct scsi_qla_host {
#define PFLG_DISCONNECTED 0 /* PCI device removed */
#define PFLG_DRIVER_REMOVING 1 /* PCI driver .remove */
#define PFLG_DRIVER_PROBING 2 /* PCI driver .probe */
#define PCI_ERR 30
uint32_t device_flags;
#define SWITCH_FOUND BIT_0