diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2023-07-24 20:40:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-05 09:31:41 +0300 |
| commit | f429378a9bf84d79a7e2cae05d2e3384cf7d68ba (patch) | |
| tree | 0327437fe611c95fa15b0adb5144428925ac16a5 /drivers/base | |
| parent | 22d2381bbd70a5853c2ee77522f4965139672db9 (diff) | |
| download | linux-f429378a9bf84d79a7e2cae05d2e3384cf7d68ba.tar.xz | |
driver core: Call dma_cleanup() on the test_remove path
When test_remove is enabled really_probe() does not properly pair
dma_configure() with dma_remove(), it will end up calling dma_configure()
twice. This corrupts the owner_cnt and renders the group unusable with
VFIO/etc.
Add the missing cleanup before going back to re_probe.
Fixes: 25f3bcfc54bc ("driver core: Add dma_cleanup callback in bus_type")
Reported-by: Zenghui Yu <yuzenghui@huawei.com>
Tested-by: Zenghui Yu <yuzenghui@huawei.com>
Closes: https://lore.kernel.org/all/6472f254-c3c4-8610-4a37-8d9dfdd54ce8@huawei.com/
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/0-v2-4deed94e283e+40948-really_probe_dma_cleanup_jgg@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/dd.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 878aa7646b37..a528cec24264 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -693,6 +693,8 @@ re_probe: device_remove(dev); driver_sysfs_remove(dev); + if (dev->bus && dev->bus->dma_cleanup) + dev->bus->dma_cleanup(dev); device_unbind_cleanup(dev); goto re_probe; |