This is a note to let you know that I've just added the patch titled
cxl/pci: Remove unnecessary device reference management in sanitize work
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
cxl-pci-remove-unnecessary-device-reference-manageme.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 81d697cd89a60604270558e681ae8e3acfea210e
Author: Dan Williams <dan.j.williams@xxxxxxxxx>
Date: Fri Sep 29 14:44:46 2023 -0700
cxl/pci: Remove unnecessary device reference management in sanitize work
[ Upstream commit 76fe8713dd0a1331d84d767e8e5d3f365d959e8a ]
Given that any particular put_device() could be the final put of the
device, the fact that there are usages of cxlds->dev after
put_device(cxlds->dev) is a red flag. Drop the reference counting since
the device is pinned by being registered and will not be unregistered
without triggering the driver + workqueue to shutdown.
Reviewed-by: Dave Jiang <dave.jiang@xxxxxxxxx>
Reviewed-by: Davidlohr Bueso <dave@xxxxxxxxxxxx>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Reviewed-by: Ira Weiny <ira.weiny@xxxxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Stable-dep-of: 5f2da1971446 ("cxl/pci: Fix sanitize notifier setup")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
index 44a21ab7add51..aa1b3dd9e64c4 100644
--- a/drivers/cxl/pci.c
+++ b/drivers/cxl/pci.c
@@ -152,8 +152,6 @@ static void cxl_mbox_sanitize_work(struct work_struct *work)
mutex_lock(&mds->mbox_mutex);
if (cxl_mbox_background_complete(cxlds)) {
mds->security.poll_tmo_secs = 0;
- put_device(cxlds->dev);
-
if (mds->security.sanitize_node)
sysfs_notify_dirent(mds->security.sanitize_node);
@@ -296,9 +294,6 @@ static int __cxl_pci_mbox_send_cmd(struct cxl_memdev_state *mds,
*/
if (mbox_cmd->opcode == CXL_MBOX_OP_SANITIZE) {
if (mds->security.poll) {
- /* hold the device throughout */
- get_device(cxlds->dev);
-
/* give first timeout a second */
timeout = 1;
mds->security.poll_tmo_secs = timeout;
