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authorAlexey Kardashevskiy <aik@ozlabs.ru>2017-02-01 04:26:16 +0100
committerAlex Williamson <alex.williamson@redhat.com>2017-02-01 17:48:34 +0100
commit2da64d20a0b20046d688e44f4033efd09157e29d (patch)
tree44d2bca16b1b26dd2d06254940ba213847bea7b4 /drivers
parentLinux 4.10-rc6 (diff)
downloadlinux-2da64d20a0b20046d688e44f4033efd09157e29d.tar.xz
linux-2da64d20a0b20046d688e44f4033efd09157e29d.zip
vfio/spapr: Fix missing mutex unlock when creating a window
Commit d9c728949ddc ("vfio/spapr: Postpone default window creation") added an additional exit to the VFIO_IOMMU_SPAPR_TCE_CREATE case and made it possible to return from tce_iommu_ioctl() without unlocking container->lock; this fixes the issue. Fixes: d9c728949ddc ("vfio/spapr: Postpone default window creation") Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/vfio/vfio_iommu_spapr_tce.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
index 128d10282d16..7690e5bf3cf1 100644
--- a/drivers/vfio/vfio_iommu_spapr_tce.c
+++ b/drivers/vfio/vfio_iommu_spapr_tce.c
@@ -1123,12 +1123,11 @@ static long tce_iommu_ioctl(void *iommu_data,
mutex_lock(&container->lock);
ret = tce_iommu_create_default_window(container);
- if (ret)
- return ret;
-
- ret = tce_iommu_create_window(container, create.page_shift,
- create.window_size, create.levels,
- &create.start_addr);
+ if (!ret)
+ ret = tce_iommu_create_window(container,
+ create.page_shift,
+ create.window_size, create.levels,
+ &create.start_addr);
mutex_unlock(&container->lock);