From 51d648af5892219cbe97305efb300d3e56746591 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Wed, 18 Sep 2013 21:27:28 +0900 Subject: [PATCH] [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 Signed-off-by: Akinobu Mita Acked-by: Martin K. Petersen Signed-off-by: James Bottomley --- drivers/scsi/scsi_debug.c | 19 ++++++++----------- 1 file changed, 8 insertions(+), 11 deletions(-) diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index a21322d6da61..80b8b10edf41 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -1745,25 +1745,22 @@ static int do_device_access(struct scsi_cmnd *scmd, 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 @@ static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec, 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);