[Qemu-devel] [PATCH 25/35] scsi-generic: check ioctl statuses when SG_IO succeeds

[Paolo Bonzini]

A succeeding ioctl does not imply that the SCSI command succeeded.

Signed-off-by: Paolo Bonzini <address@hidden>
---
 hw/scsi-generic.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/scsi-generic.c b/hw/scsi-generic.c
index da104a6..9043eea 100644
--- a/hw/scsi-generic.c
+++ b/hw/scsi-generic.c
@@ -311,7 +311,7 @@ static int get_blocksize(BlockDriverState *bdrv)
     io_header.timeout = 6000; /* XXX */
 
     ret = bdrv_ioctl(bdrv, SG_IO, &io_header);
-    if (ret < 0)
+    if (ret < 0 || io_header.driver_status || io_header.host_status)
         return -1;
 
     return (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7];
@@ -342,7 +342,7 @@ static int get_stream_blocksize(BlockDriverState *bdrv)
     io_header.timeout = 6000; /* XXX */
 
     ret = bdrv_ioctl(bdrv, SG_IO, &io_header);
-    if (ret < 0)
+    if (ret < 0 || io_header.driver_status || io_header.host_status)
         return -1;
 
     return (buf[9] << 16) | (buf[10] << 8) | buf[11];
-- 
1.7.6