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    Subject[PATCH 5.15 174/230] virtio-blk: modify the value type of num in virtio_queue_rq()
    Date
    From: Ye Guojin <ye.guojin@zte.com.cn>

    commit 0466a39bd0b6c462338f10d18076703d14a552de upstream.

    This was found by coccicheck:
    ./drivers/block/virtio_blk.c, 334, 14-17, WARNING Unsigned expression
    compared with zero num < 0

    Reported-by: Zeal Robot <zealci@zte.com.cn>
    Signed-off-by: Ye Guojin <ye.guojin@zte.com.cn>
    Link: https://lore.kernel.org/r/20211117063955.160777-1-ye.guojin@zte.com.cn
    Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
    Fixes: 02746e26c39e ("virtio-blk: avoid preallocating big SGL for data")
    Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
    Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
    Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/block/virtio_blk.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/drivers/block/virtio_blk.c
    +++ b/drivers/block/virtio_blk.c
    @@ -308,7 +308,7 @@ static blk_status_t virtio_queue_rq(stru
    struct request *req = bd->rq;
    struct virtblk_req *vbr = blk_mq_rq_to_pdu(req);
    unsigned long flags;
    - unsigned int num;
    + int num;
    int qid = hctx->queue_num;
    int err;
    bool notify = false;

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