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scsi: core: don't preallocate small SGL in case of NO_SG_CHAIN 

The preallocated small SGL depends on SG_CHAIN so if the ARCH doesn't
support SG_CHAIN, preallocation of small SGL can't work at all.

Fix this issue by not using small preallocation in case of NO_SG_CHAIN.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Ewan D. Milne <emilne@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Ming Lei 2019-06-06 16:34:09 +08:00 committed by Martin K. Petersen
parent b79d9a09ae
commit 3e99b3b13a
1 changed files with 5 additions and 1 deletions
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6
drivers/scsi/scsi_lib.c
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@ -43,9 +43,13 @@
* Size of integrity metadata is usually small, 1 inline sg should
* cover normal cases.
*/
#ifdef CONFIG_ARCH_NO_SG_CHAIN
#define SCSI_INLINE_PROT_SG_CNT 0
#define SCSI_INLINE_SG_CNT 0
#else
#define SCSI_INLINE_PROT_SG_CNT 1
#define SCSI_INLINE_SG_CNT 2
#endif
static struct kmem_cache *scsi_sdb_cache;
static struct kmem_cache *scsi_sense_cache;