driver core: Fix bus_type.match() error handling in __driver_attach()
authorIsaac J. Manjarres <isaacmanjarres@google.com>
Wed, 21 Sep 2022 00:14:13 +0000 (17:14 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 7 Jan 2023 10:11:54 +0000 (11:11 +0100)
commit878d15dd43bcb2d7d9f807b0cc57ece7d23c7e29
treee33fc762de60e70fe14346deffb15df5756bbf7f
parentcced6678325bd4b400018e0e616f4cd98179f784
driver core: Fix bus_type.match() error handling in __driver_attach()

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@vger.kernel.org
Cc: Saravana Kannan <saravanak@google.com>
Signed-off-by: Isaac J. Manjarres <isaacmanjarres@google.com>
Link: https://lore.kernel.org/r/20220921001414.4046492-1-isaacmanjarres@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/base/dd.c