nvmem: mtk-efuse: use stack for nvmem_config instead of malloc'ing it

nvmem_register() copies all the members of nvmem_config to
nvmem_device.  So, nvmem_config is one-time use data during
probing.  There is no point to keep it until the driver detach.
Using stack should be no problem because nvmem_config is pretty
small.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 10 insertions, 14 deletions

diff --git a/drivers/nvmem/mtk-efuse.c b/drivers/nvmem/mtk-efuse.c
index 32fd572e18c5..fa7a0f66b37e 100644
--- a/drivers/nvmem/mtk-efuse.c
+++ b/drivers/nvmem/mtk-efuse.c
@@ -49,7 +49,7 @@ static int mtk_efuse_probe(struct platform_device *pdev)
         struct device *dev = &pdev->dev;
         struct resource *res;
         struct nvmem_device *nvmem;
-        struct nvmem_config *econfig;
+        struct nvmem_config econfig = {};
         void __iomem *base;
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -57,19 +57,15 @@ static int mtk_efuse_probe(struct platform_device *pdev)
         if (IS_ERR(base))
                 return PTR_ERR(base);
 
-        econfig = devm_kzalloc(dev, sizeof(*econfig), GFP_KERNEL);
-        if (!econfig)
-                return -ENOMEM;
-
-        econfig->stride = 4;
-        econfig->word_size = 4;
-        econfig->reg_read = mtk_reg_read;
-        econfig->reg_write = mtk_reg_write;
-        econfig->size = resource_size(res);
-        econfig->priv = base;
-        econfig->dev = dev;
-        econfig->owner = THIS_MODULE;
-        nvmem = nvmem_register(econfig);
+        econfig.stride = 4;
+        econfig.word_size = 4;
+        econfig.reg_read = mtk_reg_read;
+        econfig.reg_write = mtk_reg_write;
+        econfig.size = resource_size(res);
+        econfig.priv = base;
+        econfig.dev = dev;
+        econfig.owner = THIS_MODULE;
+        nvmem = nvmem_register(&econfig);
         if (IS_ERR(nvmem))
                 return PTR_ERR(nvmem);