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>
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 45b43e9..30cbea5 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -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;
