scsi: Improve scsi_get_sense_info_fld
Use get_unaligned_be32 and get_unaligned_be64 to obtain values from the
sense buffer instead of open coding the operations. Also change the
function return value to a bool and fix the function signature
declaration to remove spaces triggering checkpatch warnings.
No functional change is introduced by this patch.
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Bart Van Assche <Bart.VanAssche@sandisk.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 53e3343..d70c67c 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -46,6 +46,8 @@
#include <trace/events/scsi.h>
+#include <asm/unaligned.h>
+
static void scsi_eh_done(struct scsi_cmnd *scmd);
/*
@@ -2361,44 +2363,34 @@ EXPORT_SYMBOL(scsi_command_normalize_sense);
* field will be placed if found.
*
* Return value:
- * 1 if information field found, 0 if not found.
+ * true if information field found, false if not found.
*/
-int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len,
- u64 * info_out)
+bool scsi_get_sense_info_fld(const u8 *sense_buffer, int sb_len,
+ u64 *info_out)
{
- int j;
const u8 * ucp;
- u64 ull;
if (sb_len < 7)
- return 0;
+ return false;
switch (sense_buffer[0] & 0x7f) {
case 0x70:
case 0x71:
if (sense_buffer[0] & 0x80) {
- *info_out = (sense_buffer[3] << 24) +
- (sense_buffer[4] << 16) +
- (sense_buffer[5] << 8) + sense_buffer[6];
- return 1;
- } else
- return 0;
+ *info_out = get_unaligned_be32(&sense_buffer[3]);
+ return true;
+ }
+ return false;
case 0x72:
case 0x73:
ucp = scsi_sense_desc_find(sense_buffer, sb_len,
0 /* info desc */);
if (ucp && (0xa == ucp[1])) {
- ull = 0;
- for (j = 0; j < 8; ++j) {
- if (j > 0)
- ull <<= 8;
- ull |= ucp[4 + j];
- }
- *info_out = ull;
- return 1;
- } else
- return 0;
+ *info_out = get_unaligned_be64(&ucp[4]);
+ return true;
+ }
+ return false;
default:
- return 0;
+ return false;
}
}
EXPORT_SYMBOL(scsi_get_sense_info_fld);