linux-kernel - [PATCH v5 09/21] nvmem: core: fix cell removal on error

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Date:   Tue,  6 Dec 2022 21:07:28 +0100
From:   Michael Walle <michael@...le.cc>
To:     Jonathan Corbet <corbet@....net>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Sascha Hauer <s.hauer@...gutronix.de>
Cc:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        Michael Walle <michael@...le.cc>,
        Dan Carpenter <error27@...il.com>
Subject: [PATCH v5 09/21] nvmem: core: fix cell removal on error

nvmem_add_cells() could return an error after some cells are already
added to the provider. In this case, the added cells are not removed.
Remove any registered cells if nvmem_add_cells() fails.

Signed-off-by: Michael Walle <michael@...le.cc>
---
changes since v4:
 - new patch

 drivers/nvmem/core.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 7c76e0e0072e..70c3d0a20d0d 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -851,7 +851,7 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
 	if (config->cells) {
 		rval = nvmem_add_cells(nvmem, config->cells, config->ncells);
 		if (rval)
-			goto err_teardown_compat;
+			goto err_remove_cells;
 	}
 
 	rval = nvmem_add_cells_from_table(nvmem);
@@ -868,7 +868,6 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
 
 err_remove_cells:
 	nvmem_device_remove_all_cells(nvmem);
-err_teardown_compat:
 	if (config->compat)
 		nvmem_sysfs_remove_compat(nvmem, config);
 err_device_del:
-- 
2.30.2