linux-kernel - [PATCH] nvmem: core: don't check the return value of notifier chain call

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Message-Id: <20190215104259.30732-1-brgl@bgdev.pl>
Date:   Fri, 15 Feb 2019 11:42:59 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        stable@...r.kernel.org
Subject: [PATCH] nvmem: core: don't check the return value of notifier chain call

From: Bartosz Golaszewski <bgolaszewski@...libre.com>

blocking_notifier_call_chain() returns the value returned by the last
registered callback. A positive return value doesn't indicate an error
and an nvmem device should correctly register irrespective of any
notifier callback failures. Drop the retval check.

Fixes: bee1138bea15 ("nvmem: add a notifier chain")
Cc: stable@...r.kernel.org
Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
 drivers/nvmem/core.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index f7301bb4ef3b..3ce65927e11c 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -686,9 +686,7 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
 	if (rval)
 		goto err_remove_cells;
 
-	rval = blocking_notifier_call_chain(&nvmem_notifier, NVMEM_ADD, nvmem);
-	if (rval)
-		goto err_remove_cells;
+	blocking_notifier_call_chain(&nvmem_notifier, NVMEM_ADD, nvmem);
 
 	return nvmem;
 
-- 
2.20.1