From 8b6b2afcf85dd5ff33075e93a2e30fbea34c5a55 Mon Sep 17 00:00:00 2001 From: Pierre Riteau Date: Wed, 12 Jan 2011 14:41:00 +0100 Subject: Avoid divide by zero when there is no block device to migrate When block migration is requested and no read-write block device is present, a divide by zero exception is triggered because total_sector_sum equals zero. Signed-off-by: Pierre Riteau Signed-off-by: Kevin Wolf --- block-migration.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'block-migration.c') diff --git a/block-migration.c b/block-migration.c index 14753254d6..60b9fc0ef0 100644 --- a/block-migration.c +++ b/block-migration.c @@ -350,7 +350,12 @@ static int blk_mig_save_bulked_block(Monitor *mon, QEMUFile *f) } } - progress = completed_sector_sum * 100 / block_mig_state.total_sector_sum; + if (block_mig_state.total_sector_sum != 0) { + progress = completed_sector_sum * 100 / + block_mig_state.total_sector_sum; + } else { + progress = 100; + } if (progress != block_mig_state.prev_progress) { block_mig_state.prev_progress = progress; qemu_put_be64(f, (progress << BDRV_SECTOR_BITS) -- cgit v1.2.1