From 14784565f740e862adae4b1d7c91f51b4038c4f5 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 9 Nov 2018 14:42:38 +0100 Subject: [PATCH] scsi: clean up error handling in scsi_init_io There is no need to call scsi_mq_free_sgtables until we have actually allocated sgtables. Reviewed-by: Johannes Thumshirn Reviewed-by: Bart Van Assche Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- drivers/scsi/scsi_lib.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index e665c25da144..1f84e2cec57b 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1044,31 +1044,30 @@ int scsi_init_io(struct scsi_cmnd *cmd) int error = BLKPREP_KILL; if (WARN_ON_ONCE(!blk_rq_nr_phys_segments(rq))) - goto err_exit; + return BLKPREP_KILL; error = scsi_init_sgtable(rq, &cmd->sdb); if (error) - goto err_exit; + return error; if (blk_bidi_rq(rq)) { error = scsi_init_sgtable(rq->next_rq, rq->next_rq->special); if (error) - goto err_exit; + goto out_free_sgtables; } if (blk_integrity_rq(rq)) { struct scsi_data_buffer *prot_sdb = cmd->prot_sdb; int ivecs, count; - if (prot_sdb == NULL) { + if (WARN_ON_ONCE(!prot_sdb)) { /* * This can happen if someone (e.g. multipath) * queues a command to a device on an adapter * that does not support DIX. */ - WARN_ON_ONCE(1); error = BLKPREP_KILL; - goto err_exit; + goto out_free_sgtables; } ivecs = blk_rq_count_integrity_sg(rq->q, rq->bio); @@ -1076,7 +1075,7 @@ int scsi_init_io(struct scsi_cmnd *cmd) if (sg_alloc_table_chained(&prot_sdb->table, ivecs, prot_sdb->table.sgl)) { error = BLKPREP_DEFER; - goto err_exit; + goto out_free_sgtables; } count = blk_rq_map_integrity_sg(rq->q, rq->bio, @@ -1089,7 +1088,7 @@ int scsi_init_io(struct scsi_cmnd *cmd) } return BLKPREP_OK; -err_exit: +out_free_sgtables: scsi_mq_free_sgtables(cmd); return error; } -- 2.30.2