scsi: sg: Increase number of devices

Larger setups may need to allocate more than 32k sg devices, so increase
the number of devices to the full range of minor device numbers.

Signed-off-by: Hannes Reinecke <[email protected]>
Signed-off-by: Martin Wilck <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Acked-by: Douglas Gilbert <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Ming Lei <[email protected]>
Reviewed-by: Bart Van Assche <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

Author: hreinecke

drivers/scsi/sg.c

@@ -71,7 +71,7 @@ static int sg_proc_init(void);
 
 #define SG_ALLOW_DIO_DEF 0
 
-#define SG_MAX_DEVS 32768
+#define SG_MAX_DEVS (1 << MINORBITS)
 
 /* SG_MAX_CDB_SIZE should be 260 (spc4r37 section 3.1.30) however the type
  * of sg_io_hdr::cmd_len can only represent 255. All SCSI commands greater