From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Christoph Hellwig , Sasha Levin Subject: [PATCH AUTOSEL 3.18 29/98] scsi: ->queue_rq can't sleep Date: Thu, 25 Oct 2018 10:17:44 -0400 Message-Id: <20181025141853.214051-29-sashal@kernel.org> In-Reply-To: <20181025141853.214051-1-sashal@kernel.org> References: <20181025141853.214051-1-sashal@kernel.org> List-ID: From: Christoph Hellwig [ Upstream commit 70a0f2c1898c6abf53670e55642b6e840b003892 ] The blk-mq ->queue_rq method is always called from process context, but might have preemption disabled. This means we still always have to use GFP_ATOMIC for memory allocations, and thus need to revert part of commit 3c356bde1 ("scsi: stop passing a gfp_mask argument down the command setup path"). Signed-off-by: Christoph Hellwig Reported-by: Sasha Levin Reviewed-by: Bart Van Assche Tested-by: Alexei Starovoitov Signed-off-by: Sasha Levin --- drivers/scsi/scsi_lib.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index a11837054d6c..0d5c218b7ad1 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -616,7 +616,7 @@ static int scsi_alloc_sgtable(struct scsi_data_buffer *sdb, int nents, } ret = __sg_alloc_table(&sdb->table, nents, SCSI_MAX_SG_SEGMENTS, - first_chunk, gfp_mask, scsi_sg_alloc); + first_chunk, GFP_ATOMIC, scsi_sg_alloc); if (unlikely(ret)) scsi_free_sgtable(sdb, mq); return ret; -- 2.17.1