block: use jiffies conversion functions in scsi_ioctl.c

Use msecs_to_jiffies() and jiffies_to_msecs() in scsi_ioctl().
Sometimes callers use very large values for e.g. vendor specific media
clear command and calculation can overflow.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index 91c7322..9675b34 100644 (file)
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -230,7 +230,7 @@ static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
        rq->cmd_len = hdr->cmd_len;
        rq->cmd_type = REQ_TYPE_BLOCK_PC;
 
-       rq->timeout = (hdr->timeout * HZ) / 1000;
+       rq->timeout = msecs_to_jiffies(hdr->timeout);
        if (!rq->timeout)
                rq->timeout = q->sg_timeout;
        if (!rq->timeout)
@@ -366,7 +366,7 @@ static int sg_io(struct file *file, struct request_queue *q,
         */
        blk_execute_rq(q, bd_disk, rq, 0);
 
-       hdr->duration = ((jiffies - start_time) * 1000) / HZ;
+       hdr->duration = jiffies_to_msecs(jiffies - start_time);
 
        return blk_complete_sghdr_rq(rq, hdr, bio);
 out: