FAILED: patch "[PATCH] driver core: Fix bus_type.match() error handling in" failed to apply to 5.4-stable tree

FAILED: patch "[PATCH] driver core: Fix bus_type.match() error handling in" failed to apply to 5.4-stable tree

[gregkh]

The patch below does not apply to the 5.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

Possible dependencies:

27c0d217340e ("driver core: Fix bus_type.match() error handling in __driver_attach()")
eb7fbc9fb118 ("driver core: Add missing '\n' in log messages")
64c775fb4b21 ("driver core: Rename deferred_probe_timeout and make it global")
0e9f8d09d280 ("driver core: Remove driver_deferred_probe_check_state_continue()")
e2cec7d68537 ("driver core: Set deferred_probe_timeout to a longer default if CONFIG_MODULES is set")
c8c43cee29f6 ("driver core: Fix driver_deferred_probe_check_state() logic")
4c002c978b7f ("device.h: move 'struct driver' stuff out to device/driver.h")
a8ae608529ab ("device.h: move 'struct class' stuff out to device/class.h")
5aee2bf2629d ("device.h: move 'struct bus' stuff out to device/bus.h")
fc5a251d0fd7 ("driver core: Add sync_state driver/bus callback")
e2ae9bcc4aaa ("driver core: Add support for linking devices during device addition")
372a67c0c5ef ("driver core: Add fwnode_to_dev() to look up device from fwnode")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 27c0d217340e47ec995557f61423ef415afba987 Mon Sep 17 00:00:00 2001
From: "Isaac J. Manjarres" <isaacmanjarres@google.com>
Date: Tue, 20 Sep 2022 17:14:13 -0700
Subject: [PATCH] driver core: Fix bus_type.match() error handling in
 __driver_attach()

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>

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 4001e22617ab..e9b2f9c25efe 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -1162,7 +1162,11 @@ static int __driver_attach(struct device *dev, void *data)
 		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)) {