>From 8f4cbec758867e51839d2f3f270fc06907a97dd5 Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Sun, 16 May 2010 18:28:35 -0700 Subject: [PATCH 2/2] [block]: Add SG_IO device check in refresh_total_sectors() 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 --- 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