linux-kernel - [PATCH v3 05/21] nvmem: check the return value of nvmem_add

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Message-Id: <20180912075129.25185-6-brgl@bgdev.pl>
Date:   Wed, 12 Sep 2018 09:51:13 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        "David S . Miller" <davem@...emloft.net>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Jonathan Corbet <corbet@....net>, Sekhar Nori <nsekhar@...com>,
        Kevin Hilman <khilman@...nel.org>,
        David Lechner <david@...hnology.com>,
        Boris Brezillon <boris.brezillon@...tlin.com>,
        Andrew Lunn <andrew@...n.ch>, Alban Bedel <albeu@...e.fr>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>
Cc:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH v3 05/21] nvmem: check the return value of nvmem_add_cells()

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

This function can fail so check its return value in nvmem_register()
and act accordingly.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
 drivers/nvmem/core.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index b469f700c699..ffed8fa16936 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -512,11 +512,17 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
 			goto err_device_del;
 	}
 
-	if (config->cells)
-		nvmem_add_cells(nvmem, config->cells, config->ncells);
+	if (config->cells) {
+		rval = nvmem_add_cells(nvmem, config->cells, config->ncells);
+		if (rval)
+			goto err_teardown_compat;
+	}
 
 	return nvmem;
 
+err_teardown_compat:
+	if (config->compat)
+		device_remove_bin_file(nvmem->base_dev, &nvmem->eeprom);
 err_device_del:
 	device_del(&nvmem->dev);
 err_put_device:
-- 
2.18.0