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[Qemu-devel] [PATCH 07/18] ahci: Fix crashes on duplicate BH registratio
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH 07/18] ahci: Fix crashes on duplicate BH registration |
Date: |
Thu, 19 May 2011 14:33:21 +0200 |
From: Jan Kiszka <address@hidden>
If ahci_dma_set_inactive is called a while there is still a pending BH
from a previous run, we will crash on the second run of
ahci_check_cmd_bh as it overwrites AHCIDevice::check_bh. Avoid this
broken and redundant duplicate registration.
Signed-off-by: Jan Kiszka <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
hw/ide/ahci.c | 8 +++++---
1 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
index c6e0c77..744d19d 100644
--- a/hw/ide/ahci.c
+++ b/hw/ide/ahci.c
@@ -1066,9 +1066,11 @@ static int ahci_dma_set_inactive(IDEDMA *dma)
ad->dma_cb = NULL;
- /* maybe we still have something to process, check later */
- ad->check_bh = qemu_bh_new(ahci_check_cmd_bh, ad);
- qemu_bh_schedule(ad->check_bh);
+ if (!ad->check_bh) {
+ /* maybe we still have something to process, check later */
+ ad->check_bh = qemu_bh_new(ahci_check_cmd_bh, ad);
+ qemu_bh_schedule(ad->check_bh);
+ }
return 0;
}
--
1.7.2.3
- [Qemu-devel] [PATCH 01/18] ide: cleanup warnings, (continued)
- [Qemu-devel] [PATCH 04/18] hw/xen_disk: Remove unused local variable, Kevin Wolf, 2011/05/19
- [Qemu-devel] [PATCH 06/18] Add documentation for qemu_progress_{init, print}(), Kevin Wolf, 2011/05/19
- [Qemu-devel] [PATCH 08/18] qemu-tool: Stub out qemu-timer functions, Kevin Wolf, 2011/05/19
- [Qemu-devel] [PATCH 07/18] ahci: Fix crashes on duplicate BH registration,
Kevin Wolf <=
- [Qemu-devel] [PATCH 09/18] qed: Periodically flush and clear need check bit, Kevin Wolf, 2011/05/19
- [Qemu-devel] [PATCH 11/18] qed: support for growing images, Kevin Wolf, 2011/05/19
- [Qemu-devel] [PATCH 12/18] ide: Split qdev "ide-drive" into "ide-hd" and "ide-cd", Kevin Wolf, 2011/05/19
- [Qemu-devel] [PATCH 10/18] qemu_img: is_not_zero() optimization, Kevin Wolf, 2011/05/19
- [Qemu-devel] [PATCH 14/18] defaults: ide-cd, ide-hd and scsi-cd devices suppress default CD-ROM, Kevin Wolf, 2011/05/19
- [Qemu-devel] [PATCH 13/18] scsi: Split qdev "scsi-disk" into "scsi-hd" and "scsi-cd", Kevin Wolf, 2011/05/19
- [Qemu-devel] [PATCH 15/18] block QMP: Deprecate query-block's "type", drop info block's "type=", Kevin Wolf, 2011/05/19
- [Qemu-devel] [PATCH 16/18] blockdev: Store -drive option media in DriveInfo, Kevin Wolf, 2011/05/19
- [Qemu-devel] [PATCH 17/18] block: Remove type hint, it's guest matter, doesn't belong here, Kevin Wolf, 2011/05/19
- [Qemu-devel] [PATCH 18/18] ahci: Fix non-NCQ accesses for LBA > 16bits, Kevin Wolf, 2011/05/19