scsi: smartpqi: Fix device resources accessed after device removal

Correct possible race conditions during device removal.

Previously, a scheduled work item to reset a LUN could still execute
after the device was removed, leading to use-after-free and other
resource access issues.

This race condition occurs because the abort handler may schedule a LUN
reset concurrently with device removal via sdev_destroy(), leading to
use-after-free and improper access to freed resources.

  - Check in the device reset handler if the device is still present in
    the controller's SCSI device list before running; if not, the reset
    is skipped.

  - Cancel any pending TMF work that has not started in sdev_destroy().

  - Ensure device freeing in sdev_destroy() is done while holding the
    LUN reset mutex to avoid races with ongoing resets.

Fixes: 2d80f4054f7f ("scsi: smartpqi: Update deleting a LUN via sysfs")
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Signed-off-by: Mike McGowen <mike.mcgowen@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
Link: https://patch.msgid.link/20251106163823.786828-3-don.brace@microchip.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

0 files changed, 0 insertions, 0 deletions