virtio-blk: fixup coccinelle warnings
coccicheck complains about the use of snprintf() in sysfs show functions: WARNING use scnprintf or sprintf Use sysfs_emit instead of scnprintf or sprintf makes more sense. Reported-by:Zeal Robot <zealci@zte.com.cn> Signed-off-by:
Ye Guojin <ye.guojin@zte.com.cn> Link: https://lore.kernel.org/r/20211021065111.1047824-1-ye.guojin@zte.com.cn Signed-off-by:
Michael S. Tsirkin <mst@redhat.com> Reviewed-by:
Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by:
Stefano Garzarella <sgarzare@redhat.com>
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