From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
This patch adds a special case check for scsi-generic devices in refresh_total_sectors()
to skip the subsequent BlockDriver->bdrv_getlength() that will be returning
-ESPIPE from block/raw-posic.c:raw_getlength() for BlockDriverState->sg=1 devices.
Signed-off-by: Nicholas A. Bellinger <nab@xxxxxxxxxxxxxxx>
---
block.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/block.c b/block.c
index f419ee6..7917712 100644
--- a/block.c
+++ b/block.c
@@ -364,6 +364,10 @@ static int refresh_total_sectors(BlockDriverState *bs, int64_t hint)
{
BlockDriver *drv = bs->drv;
+ /* Do not attempt drv->bdrv_getlength() on scsi-generic devices */
+ if (bs->sg)
+ return 0;
+
/* query actual device if possible, otherwise just trust the hint */
if (drv->bdrv_getlength) {
int64_t length = drv->bdrv_getlength(bs);
--
1.5.6.5
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