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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2013-06-29 17:59:18 +0900 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2013-07-09 09:25:35 +0100 |
| commit | e18d8bea33077d259cc826c6d3fa76d36af61876 (patch) | |
| tree | 6857a4ca1f8f3a0b9cd8054f7c3d976115bf8c49 /drivers/scsi | |
| parent | e9926b4376544d5a2dc4d310d4d0006c634b1a93 (diff) | |
| download | linux-e18d8bea33077d259cc826c6d3fa76d36af61876.tar.bz2 | |
[SCSI] scsi_debug: simplify offset calculation for dif_storep
dif_storep is declared as pointer to unsigned char type. But it is
actually used to store vmalloced array of struct sd_dif_tuple.
This changes the type of dif_storep to the pointer to struct sd_dif_tuple.
It simplifies offset calculation for dif_storep and enables to remove
hardcoded size of struct sd_dif_tuple.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Acked-by: "Martin K. Petersen" <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/scsi_debug.c | 18 |
1 files changed, 7 insertions, 11 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 83efec2919b1..fc8b3aa083d4 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -258,7 +258,7 @@ struct sdebug_queued_cmd { static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE]; static unsigned char * fake_storep; /* ramdisk storage */ -static unsigned char *dif_storep; /* protection info */ +static struct sd_dif_tuple *dif_storep; /* protection info */ static void *map_storep; /* provisioning map */ static unsigned long map_size; @@ -277,11 +277,6 @@ static char sdebug_proc_name[] = "scsi_debug"; static struct bus_type pseudo_lld_bus; -static inline sector_t dif_offset(sector_t sector) -{ - return sector << 3; -} - static struct device_driver sdebug_driverfs_driver = { .name = sdebug_proc_name, .bus = &pseudo_lld_bus, @@ -1727,7 +1722,7 @@ static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec, start_sec = do_div(tmp_sec, sdebug_store_sectors); - sdt = (struct sd_dif_tuple *)(dif_storep + dif_offset(start_sec)); + sdt = dif_storep + start_sec; for (i = 0 ; i < sectors ; i++) { u16 csum; @@ -1782,16 +1777,17 @@ static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec, ei_lba++; } - resid = sectors * 8; /* Bytes of protection data to copy into sgl */ + /* Bytes of protection data to copy into sgl */ + resid = sectors * sizeof(*dif_storep); sector = start_sec; scsi_for_each_prot_sg(SCpnt, psgl, scsi_prot_sg_count(SCpnt), i) { int len = min(psgl->length, resid); paddr = kmap_atomic(sg_page(psgl)) + psgl->offset; - memcpy(paddr, dif_storep + dif_offset(sector), len); + memcpy(paddr, dif_storep + sector, len); - sector += len >> 3; + sector += len / sizeof(*dif_storep); if (sector >= sdebug_store_sectors) { /* Force wrap */ tmp_sec = sector; @@ -1968,7 +1964,7 @@ static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec, * correctness we need to verify each sector * before writing it to "stable" storage */ - memcpy(dif_storep + dif_offset(sector), sdt, 8); + memcpy(dif_storep + sector, sdt, sizeof(*sdt)); sector++; |