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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2015-02-15 16:07:18 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2015-02-15 16:07:18 -0800 |
| commit | 97ae2b5c17d6cc988c6d49ae0cf95befb6b7081c (patch) | |
| tree | a71115af6c30fdc9de0878e2cf1c51e95b17a324 /drivers/scsi/scsi_lib.c | |
| parent | ef47fa5280819deaa8da7e0db1d875b225de5838 (diff) | |
| parent | c8af781ebf3ffe37c18c34ca89e29c085560e561 (diff) | |
Merge branch 'bfin_rotary' into next
Merge bfin_rotary driver changes from Sonic Zhang.
Diffstat (limited to 'drivers/scsi/scsi_lib.c')
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 9ea95dd3e26..17bb541f7cc 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -591,7 +591,6 @@ static void scsi_free_sgtable(struct scsi_data_buffer *sdb, bool mq) static int scsi_alloc_sgtable(struct scsi_data_buffer *sdb, int nents, bool mq) { struct scatterlist *first_chunk = NULL; - gfp_t gfp_mask = mq ? GFP_NOIO : GFP_ATOMIC; int ret; BUG_ON(!nents); @@ -606,7 +605,7 @@ static int scsi_alloc_sgtable(struct scsi_data_buffer *sdb, int nents, bool mq) } 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; @@ -1144,7 +1143,17 @@ int scsi_init_io(struct scsi_cmnd *cmd) struct scsi_data_buffer *prot_sdb = cmd->prot_sdb; int ivecs, count; - BUG_ON(prot_sdb == NULL); + if (prot_sdb == NULL) { + /* + * 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; + } + ivecs = blk_rq_count_integrity_sg(rq->q, rq->bio); if (scsi_alloc_sgtable(prot_sdb, ivecs, is_mq)) { |