From: Isaac J. Manjarres isaacmanjarres@google.com
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 | 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)) {