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From 5544e90c81261e82e02bbf7c6015a4b9c8c825ef Mon Sep 17 00:00:00 2001
From: Gaosheng Cui <cuigaosheng1@huawei.com>
Date: Fri, 16 Sep 2022 13:20:50 +0100
Subject: [PATCH] nvmem: core: add error handling for dev_set_name
The type of return value of dev_set_name is int, which may return
wrong result, so we add error handling for it to reclaim memory
of nvmem resource, and return early when an error occurs.
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220916122100.170016-4-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/nvmem/core.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -809,18 +809,24 @@ struct nvmem_device *nvmem_register(cons
switch (config->id) {
case NVMEM_DEVID_NONE:
- dev_set_name(&nvmem->dev, "%s", config->name);
+ rval = dev_set_name(&nvmem->dev, "%s", config->name);
break;
case NVMEM_DEVID_AUTO:
- dev_set_name(&nvmem->dev, "%s%d", config->name, nvmem->id);
+ rval = dev_set_name(&nvmem->dev, "%s%d", config->name, nvmem->id);
break;
default:
- dev_set_name(&nvmem->dev, "%s%d",
+ rval = dev_set_name(&nvmem->dev, "%s%d",
config->name ? : "nvmem",
config->name ? config->id : nvmem->id);
break;
}
+ if (rval) {
+ ida_free(&nvmem_ida, nvmem->id);
+ kfree(nvmem);
+ return ERR_PTR(rval);
+ }
+
nvmem->read_only = device_property_present(config->dev, "read-only") ||
config->read_only || !nvmem->reg_write;
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