virtio-blk: Fix incorrect type conversion in virtio_blk_op()
When using spdk aio bdev driver, the qemu command line like this:
qemu-system-x86_64 \
-chardev socket,id=char0,path=/tmp/vhost.0 \
-device vhost-user-blk-pci,id=blk0,chardev=char0 \
...
Boot failure message as below:
e820 map has 7 items:
0: 0000000000000000 - 000000000009fc00 = 1 RAM
1: 000000000009fc00 - 00000000000a0000 = 2 RESERVED
2: 00000000000f0000 - 0000000000100000 = 2 RESERVED
3: 0000000000100000 - 000000007ffdd000 = 1 RAM
4: 000000007ffdd000 - 0000000080000000 = 2 RESERVED
5: 00000000feffc000 - 00000000ff000000 = 2 RESERVED
6: 00000000fffc0000 - 0000000100000000 = 2 RESERVED
enter handle_19:
NULL
Booting from Hard Disk...
Boot failed: could not read the boot disk
Fixes: a05af290bac5 ("virtio-blk: split large IO according to size_max")
Acked-by: Andy Pei <andy.pei@intel.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Xiaofei Lee <hbuxiaofei@gmail.com>
diff --git a/src/hw/virtio-blk.c b/src/hw/virtio-blk.c
index 9b4a05a..ce3265e 100644
--- a/src/hw/virtio-blk.c
+++ b/src/hw/virtio-blk.c
@@ -92,7 +92,7 @@
u16 blk_num_max;
if (vdrive->drive.blksize != 0 && max_io_size != 0)
- blk_num_max = (u16)max_io_size / vdrive->drive.blksize;
+ blk_num_max = (u16)(max_io_size / vdrive->drive.blksize);
else
/* default blk_num_max if hardware doesnot advise a proper value */
blk_num_max = 64;