[SCSI] scsi_debug: fix sparse warnings related to data integrity field
Each member in data integrity field tuple is big-endian. But the
endianness of the values being compared with these members are not
annotated. So this fixes these sparse warnings.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index a21322d..80b8b10 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -1745,25 +1745,22 @@
return ret;
}
-static u16 dif_compute_csum(const void *buf, int len)
+static __be16 dif_compute_csum(const void *buf, int len)
{
- u16 csum;
+ __be16 csum;
- switch (scsi_debug_guard) {
- case 1:
- csum = ip_compute_csum(buf, len);
- break;
- case 0:
+ if (scsi_debug_guard)
+ csum = (__force __be16)ip_compute_csum(buf, len);
+ else
csum = cpu_to_be16(crc_t10dif(buf, len));
- break;
- }
+
return csum;
}
static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
sector_t sector, u32 ei_lba)
{
- u16 csum = dif_compute_csum(data, scsi_debug_sector_size);
+ __be16 csum = dif_compute_csum(data, scsi_debug_sector_size);
if (sdt->guard_tag != csum) {
pr_err("%s: GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
@@ -1841,7 +1838,7 @@
sector = start_sec + i;
sdt = dif_store(sector);
- if (sdt->app_tag == 0xffff)
+ if (sdt->app_tag == cpu_to_be16(0xffff))
continue;
ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);