This is a note to let you know that I've just added the patch titled
driver core: Fix bus_type.match() error handling in __driver_attach()
to the 6.1-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:
driver-core-fix-bus_type.match-error-handling-in-__driver_attach.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 27c0d217340e47ec995557f61423ef415afba987 Mon Sep 17 00:00:00 2001
From: "Isaac J. Manjarres" <isaacmanjarres@xxxxxxxxxx>
Date: Tue, 20 Sep 2022 17:14:13 -0700
Subject: driver core: Fix bus_type.match() error handling in __driver_attach()
From: Isaac J. Manjarres <isaacmanjarres@xxxxxxxxxx>
commit 27c0d217340e47ec995557f61423ef415afba987 upstream.
When a driver registers with a bus, it will attempt to match with every
device on the bus through the __driver_attach() function. Currently, if
the bus_type.match() function encounters an error that is not
-EPROBE_DEFER, __driver_attach() will return a negative error code, which
causes the driver registration logic to stop trying to match with the
remaining devices on the bus.
This behavior is not correct; a failure while matching a driver to a
device does not mean that the driver won't be able to match and bind
with other devices on the bus. Update the logic in __driver_attach()
to reflect this.
Fixes: 656b8035b0ee ("ARM: 8524/1: driver cohandle -EPROBE_DEFER from bus_type.match()")
Cc: stable@xxxxxxxxxxxxxxx
Cc: Saravana Kannan <saravanak@xxxxxxxxxx>
Signed-off-by: Isaac J. Manjarres <isaacmanjarres@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220921001414.4046492-1-isaacmanjarres@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/base/dd.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -1162,7 +1162,11 @@ static int __driver_attach(struct device
return 0;
} else if (ret < 0) {
dev_dbg(dev, "Bus failed to match device: %d\n", ret);
- return ret;
+ /*
+ * Driver could not match with device, but may match with
+ * another device on the bus.
+ */
+ return 0;
} /* ret > 0 means positive match */
if (driver_allows_async_probing(drv)) {
Patches currently in stable-queue which might be from isaacmanjarres@xxxxxxxxxx are
queue-6.1/driver-core-fix-bus_type.match-error-handling-in-__driver_attach.patch
