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nvmem: qfprom: fix different address space warnings of sparse 

Fix the following sparse warnings:

drivers/nvmem/qfprom.c:23:30: warning: incorrect type in initializer (different address spaces)
drivers/nvmem/qfprom.c:23:30:    expected void [noderef] <asn:2>*base
drivers/nvmem/qfprom.c:23:30:    got void *context
drivers/nvmem/qfprom.c:36:30: warning: incorrect type in initializer (different address spaces)
drivers/nvmem/qfprom.c:36:30:    expected void [noderef] <asn:2>*base
drivers/nvmem/qfprom.c:36:30:    got void *context
drivers/nvmem/qfprom.c:76:22: warning: incorrect type in assignment (different address spaces)
drivers/nvmem/qfprom.c:76:22:    expected void *static [toplevel] [assigned] priv
drivers/nvmem/qfprom.c:76:22:    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>
This commit is contained in:
Masahiro Yamada 2017-10-21 01:57:41 +09:00 committed by Greg Kroah-Hartman
parent a48f1fff7e
commit ec3672b81f
1 changed files with 17 additions and 9 deletions
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26
drivers/nvmem/qfprom.c
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@ -17,15 +17,19 @@
#include <linux/nvmem-provider.h> #include <linux/nvmem-provider.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
struct qfprom_priv {
void __iomem *base;
};
static int qfprom_reg_read(void *context, static int qfprom_reg_read(void *context,
unsigned int reg, void *_val, size_t bytes) unsigned int reg, void *_val, size_t bytes)
{ {
void __iomem *base = context; struct qfprom_priv *priv = context;
u8 *val = _val; u8 *val = _val;
int i = 0, words = bytes; int i = 0, words = bytes;
while (words--) while (words--)
*val++ = readb(base + reg + i++); *val++ = readb(priv->base + reg + i++);
return 0; return 0;
} }
@ -33,12 +37,12 @@ static int qfprom_reg_read(void *context,
static int qfprom_reg_write(void *context, static int qfprom_reg_write(void *context,
unsigned int reg, void *_val, size_t bytes) unsigned int reg, void *_val, size_t bytes)
{ {
void __iomem *base = context; struct qfprom_priv *priv = context;
u8 *val = _val; u8 *val = _val;
int i = 0, words = bytes; int i = 0, words = bytes;
while (words--) while (words--)
writeb(*val++, base + reg + i++); writeb(*val++, priv->base + reg + i++);
return 0; return 0;
} }
@ -64,16 +68,20 @@ static int qfprom_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev; struct device *dev = &pdev->dev;
struct resource *res; struct resource *res;
struct nvmem_device *nvmem; struct nvmem_device *nvmem;
void __iomem *base; struct qfprom_priv *priv;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(dev, res); priv->base = devm_ioremap_resource(dev, res);
if (IS_ERR(base)) if (IS_ERR(priv->base))
return PTR_ERR(base); return PTR_ERR(priv->base);
econfig.size = resource_size(res); econfig.size = resource_size(res);
econfig.dev = dev; econfig.dev = dev;
econfig.priv = base; econfig.priv = priv;
nvmem = nvmem_register(&econfig); nvmem = nvmem_register(&econfig);
if (IS_ERR(nvmem)) if (IS_ERR(nvmem))