| Message ID | 20240807005907.12380-1-chaotian.jing@mediatek.com |
|---|---|
| State | New |
| Headers | show |
| Series | scsi: fix the return value of scsi_logical_block_count | expand |
Chaotian, > @@ -236,7 +236,7 @@ static inline unsigned int scsi_logical_block_count(struct scsi_cmnd *scmd) > { > unsigned int shift = ilog2(scmd->device->sector_size) - SECTOR_SHIFT; > > - return blk_rq_bytes(scsi_cmd_to_rq(scmd)) >> shift; > + return blk_rq_sectors(scsi_cmd_to_rq(scmd)) >> shift; > } There's no point in shifting twice by converting to sectors first. Please just remove the SECTOR_SHIFT subtraction.
On Mon, 2024-08-12 at 21:52 -0400, Martin K. Petersen wrote: > > External email : Please do not click links or open attachments until > you have verified the sender or the content. > > Chaotian, > > > @@ -236,7 +236,7 @@ static inline unsigned int > scsi_logical_block_count(struct scsi_cmnd *scmd) > > { > > unsigned int shift = ilog2(scmd->device->sector_size) - > SECTOR_SHIFT; > > > > - return blk_rq_bytes(scsi_cmd_to_rq(scmd)) >> shift; > > + return blk_rq_sectors(scsi_cmd_to_rq(scmd)) >> shift; > > } > > There's no point in shifting twice by converting to sectors first. > Please just remove the SECTOR_SHIFT subtraction. > Thanks, will fix it at next version. > -- > Martin K. Petersen Oracle Linux Engineering
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index 45c40d200154..f0be0caa295a 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -236,7 +236,7 @@ static inline unsigned int scsi_logical_block_count(struct scsi_cmnd *scmd) { unsigned int shift = ilog2(scmd->device->sector_size) - SECTOR_SHIFT; - return blk_rq_bytes(scsi_cmd_to_rq(scmd)) >> shift; + return blk_rq_sectors(scsi_cmd_to_rq(scmd)) >> shift; } /*
scsi_logical_block_count() should return the block count of scsi device, but the original code has a wrong implement. Cc: stable@vger.kernel.org Fixes: 6a20e21ae1e2 ("scsi: core: Add helper to return number of logical blocks in a request") Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> --- include/scsi/scsi_cmnd.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)