Struct scsi_device.sector_size is unsigned int, so the value of factor
can have at most 23 significant bits.
Adding a type check to do_div() caught these two do_div as the only
invocations in the kernel passing a non-32-bit divisor.
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: linux-scsi@xxxxxxxxxxxxxxx
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
drivers/scsi/sd.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index fa3a591..42a1ff6 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1335,8 +1335,7 @@ static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd)
start_lba <<= 1;
end_lba <<= 1;
} else {
- /* be careful ... don't want any overflows */
- u64 factor = scmd->device->sector_size / 512;
+ unsigned int factor = scmd->device->sector_size / 512;
do_div(start_lba, factor);
do_div(end_lba, factor);
}
