virtio-blk: modify the value type of num in virtio_queue_rq()
authorYe Guojin <ye.guojin@zte.com.cn>
Wed, 17 Nov 2021 06:39:55 +0000 (06:39 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 12 Jul 2022 14:35:11 +0000 (16:35 +0200)
commitcb91c0548ff2b32b591af04c24a8f6e0cf229ab3
tree6eaea9977fd1a986c2cf42c0d786d74d174d7710
parentd35b78cb053a4ac5243a13ccd99101e925823a81
virtio-blk: modify the value type of num in virtio_queue_rq()

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