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authorMasahiro Yamada <yamada.masahiro@socionext.com>2017-10-20 18:57:40 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-11-08 13:54:16 +0100
commita48f1fff7e2fe5fbaf0295ff7705909fd31f1c35 (patch)
tree1454317048f4490daba4a8d416c0190523e3620c /drivers
parentnvmem: mtk-efuse: use stack for nvmem_config instead of malloc'ing it (diff)
downloadlinux-a48f1fff7e2fe5fbaf0295ff7705909fd31f1c35.tar.xz
linux-a48f1fff7e2fe5fbaf0295ff7705909fd31f1c35.zip
nvmem: mtk-efuse: fix different address space warnings of sparse
Fix the following sparse warnings: drivers/nvmem/mtk-efuse.c:24:30: warning: incorrect type in initializer (different address spaces) drivers/nvmem/mtk-efuse.c:24:30: expected void [noderef] <asn:2>*base drivers/nvmem/mtk-efuse.c:24:30: got void *context drivers/nvmem/mtk-efuse.c:37:30: warning: incorrect type in initializer (different address spaces) drivers/nvmem/mtk-efuse.c:37:30: expected void [noderef] <asn:2>*base drivers/nvmem/mtk-efuse.c:37:30: got void *context drivers/nvmem/mtk-efuse.c:69:23: warning: incorrect type in assignment (different address spaces) drivers/nvmem/mtk-efuse.c:69:23: expected void *priv drivers/nvmem/mtk-efuse.c:69:23: got void [noderef] <asn:2>*[assigned] base The type of nvmem_config->priv is (void *), so sparse complains about assignment of the base address with (void __iomem *) type. Even if we cast it out, sparse still warns: warning: cast removes address space of expression Of course, we can shut up the sparse by marking __force, but a more correct way is to put the base address into driver private data. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/nvmem/mtk-efuse.c26
1 files changed, 17 insertions, 9 deletions
diff --git a/drivers/nvmem/mtk-efuse.c b/drivers/nvmem/mtk-efuse.c
index fa7a0f66b37e..c4058b598703 100644
--- a/drivers/nvmem/mtk-efuse.c
+++ b/drivers/nvmem/mtk-efuse.c
@@ -18,15 +18,19 @@
#include <linux/nvmem-provider.h>
#include <linux/platform_device.h>
+struct mtk_efuse_priv {
+ void __iomem *base;
+};
+
static int mtk_reg_read(void *context,
unsigned int reg, void *_val, size_t bytes)
{
- void __iomem *base = context;
+ struct mtk_efuse_priv *priv = context;
u32 *val = _val;
int i = 0, words = bytes / 4;
while (words--)
- *val++ = readl(base + reg + (i++ * 4));
+ *val++ = readl(priv->base + reg + (i++ * 4));
return 0;
}
@@ -34,12 +38,12 @@ static int mtk_reg_read(void *context,
static int mtk_reg_write(void *context,
unsigned int reg, void *_val, size_t bytes)
{
- void __iomem *base = context;
+ struct mtk_efuse_priv *priv = context;
u32 *val = _val;
int i = 0, words = bytes / 4;
while (words--)
- writel(*val++, base + reg + (i++ * 4));
+ writel(*val++, priv->base + reg + (i++ * 4));
return 0;
}
@@ -50,19 +54,23 @@ static int mtk_efuse_probe(struct platform_device *pdev)
struct resource *res;
struct nvmem_device *nvmem;
struct nvmem_config econfig = {};
- void __iomem *base;
+ struct mtk_efuse_priv *priv;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- base = devm_ioremap_resource(dev, res);
- if (IS_ERR(base))
- return PTR_ERR(base);
+ priv->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
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.priv = priv;
econfig.dev = dev;
econfig.owner = THIS_MODULE;
nvmem = nvmem_register(&econfig);