scsi: sg: Avoid race in error handling & drop bogus warn

Commit 27f58c04a8f4 ("scsi: sg: Avoid sg device teardown race") introduced
an incorrect WARN_ON_ONCE() and missed a sequence where sg_device_destroy()
was used after scsi_device_put().

sg_device_destroy() is accessing the parent scsi_device request_queue which
will already be set to NULL when the preceding call to scsi_device_put()
removed the last reference to the parent scsi_device.

Drop the incorrect WARN_ON_ONCE() - allowing more than one concurrent
access to the sg device - and make sure sg_device_destroy() is not used
after scsi_device_put() in the error handling.

Link: https://lore.kernel.org/all/[email protected]
Fixes: 27f58c04a8f4 ("scsi: sg: Avoid sg device teardown race")
Cc: [email protected]
Signed-off-by: Alexander Wetzel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Tested-by: Sachin Sant <[email protected]>
Reviewed-by: Bart Van Assche <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

0 files changed, 0 insertions, 0 deletions