From 4da97120d51a4383aa96d741a2b837f8c4bbcd0b Mon Sep 17 00:00:00 2001 From: Stefan Hajnoczi Date: Wed, 9 Aug 2017 17:02:11 +0100 Subject: IDE: Do not flush empty CDROM drives The block backend changed in a way that flushing empty CDROM drives now crashes. Amend IDE to avoid doing so until the root problem can be addressed for 2.11. Original patch by John Snow . Reported-by: Kieron Shorrock Signed-off-by: Stefan Hajnoczi Reviewed-by: Eric Blake Message-id: 20170809160212.29976-2-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi --- hw/ide/core.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'hw') diff --git a/hw/ide/core.c b/hw/ide/core.c index 0b48b64d3a..bea39536b0 100644 --- a/hw/ide/core.c +++ b/hw/ide/core.c @@ -1063,7 +1063,15 @@ static void ide_flush_cache(IDEState *s) s->status |= BUSY_STAT; ide_set_retry(s); block_acct_start(blk_get_stats(s->blk), &s->acct, 0, BLOCK_ACCT_FLUSH); - s->pio_aiocb = blk_aio_flush(s->blk, ide_flush_cb, s); + + if (blk_bs(s->blk)) { + s->pio_aiocb = blk_aio_flush(s->blk, ide_flush_cb, s); + } else { + /* XXX blk_aio_flush() crashes when blk_bs(blk) is NULL, remove this + * temporary workaround when blk_aio_*() functions handle NULL blk_bs. + */ + ide_flush_cb(s, 0); + } } static void ide_cfata_metadata_inquiry(IDEState *s) -- cgit v1.2.3-55-g7522 From 17d0bc01bfcce0ad4fb5105d4502595224569ff0 Mon Sep 17 00:00:00 2001 From: Stefan Hajnoczi Date: Tue, 8 Aug 2017 13:22:51 +0100 Subject: virtio-blk: handle blk_getlength() errors If blk_getlength() fails in virtio_blk_update_config() consider the disk image length to be 0 bytes. Signed-off-by: Stefan Hajnoczi Reviewed-by: Fam Zheng Message-id: 20170808122251.29815-1-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi --- hw/block/virtio-blk.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'hw') diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index b750bd8b53..a16ac75090 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -730,6 +730,7 @@ static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config) BlockConf *conf = &s->conf.conf; struct virtio_blk_config blkcfg; uint64_t capacity; + int64_t length; int blk_size = conf->logical_block_size; blk_get_geometry(s->blk, &capacity); @@ -752,7 +753,8 @@ static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config) * divided by 512 - instead it is the amount of blk_size blocks * per track (cylinder). */ - if (blk_getlength(s->blk) / conf->heads / conf->secs % blk_size) { + length = blk_getlength(s->blk); + if (length > 0 && length / conf->heads / conf->secs % blk_size) { blkcfg.geometry.sectors = conf->secs & ~s->sector_mask; } else { blkcfg.geometry.sectors = conf->secs; -- cgit v1.2.3-55-g7522