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[Qemu-devel] [PATCH] Avoid divide by zero when there is no block device
From: |
Pierre Riteau |
Subject: |
[Qemu-devel] [PATCH] Avoid divide by zero when there is no block device to migrate |
Date: |
Sat, 25 Dec 2010 21:52:10 +0100 |
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 <address@hidden>
---
block-migration.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/block-migration.c b/block-migration.c
index 1475325..d62d63e 100644
--- a/block-migration.c
+++ b/block-migration.c
@@ -350,7 +350,11 @@ 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)
--
1.7.3.4
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