linux-kernel - [PATCH 1/2] driver core: skip removal test for non-removable drivers

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Date:   Tue, 11 Oct 2016 13:41:02 -0500
From:   Rob Herring <robh@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, Laszlo Ersek <lersek@...hat.com>
Subject: [PATCH 1/2] driver core: skip removal test for non-removable drivers

Some drivers do not support removal/unbinding. These drivers should have
drv->suppress_bind_attrs set to true, so use that to skip the removal
test.

This doesn't fix anything reported so far, but should prevent some other
cases. Some drivers will need fixes to set suppress_bind_attrs to avoid
this test.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=177021
Fixes: bea5b158ff0d ("driver core: add test of driver remove calls during probe")
Reported-by: Laszlo Ersek <lersek@...hat.com>
Signed-off-by: Rob Herring <robh@...nel.org>
---
 drivers/base/dd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index d22a7260f42b..8937a7ad7165 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -324,7 +324,8 @@ static int really_probe(struct device *dev, struct device_driver *drv)
 {
 	int ret = -EPROBE_DEFER;
 	int local_trigger_count = atomic_read(&deferred_trigger_count);
-	bool test_remove = IS_ENABLED(CONFIG_DEBUG_TEST_DRIVER_REMOVE);
+	bool test_remove = IS_ENABLED(CONFIG_DEBUG_TEST_DRIVER_REMOVE) &&
+			   !drv->suppress_bind_attrs;
 
 	if (defer_all_probes) {
 		/*
-- 
2.10.0