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Commit 3e99b3b1 authored by Ming Lei's avatar Ming Lei Committed by Martin K. Petersen
Browse files

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: default avatarGuenter Roeck <linux@roeck-us.net>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarBart Van Assche <bvanassche@acm.org>
Tested-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarMing Lei <ming.lei@redhat.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent b79d9a09

drivers/scsi/scsi_lib.c

+5 −1
Original line number Diff line number Diff line
@@ -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;