iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

driver core: Call dma_cleanup() on the test_remove path

Browse Source 
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: 25f3bcfc54 ("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>
This commit is contained in:
Jason Gunthorpe 2023-07-24 14:40:46 -03:00 committed by Greg Kroah-Hartman
parent 22d2381bbd
commit f429378a9b
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/base/dd.c
View File

@ -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;