Joe Lawrence a492f07545 block,scsi: fixup blk_get_request dead queue scenarios ... The blk_get_request function may fail in low-memory conditions or during device removal (even if __GFP_WAIT is set). To distinguish between these errors, modify the blk_get_request call stack to return the appropriate ERR_PTR. Verify that all callers check the return status and consider IS_ERR instead of a simple NULL pointer check. For consistency, make a similar change to the blk_mq_alloc_request leg of blk_get_request. It may fail if the queue is dead, or the caller was unwilling to wait. Signed-off-by: Joe Lawrence <joe.lawrence@stratus.com> Acked-by: Jiri Kosina <jkosina@suse.cz> [for pktdvd] Acked-by: Boaz Harrosh <bharrosh@panasas.com> [for osd] Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>		2014-08-28 10:03:46 -06:00
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cdrom.c	block,scsi: fixup blk_get_request dead queue scenarios	2014-08-28 10:03:46 -06:00
gdrom.c	gdrom: missed conversion from req->buffer	2014-04-16 14:15:24 -06:00
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