diff options
Diffstat (limited to 'drivers/base/driver.c')
| -rw-r--r-- | drivers/base/driver.c | 34 |
1 files changed, 20 insertions, 14 deletions
diff --git a/drivers/base/driver.c b/drivers/base/driver.c index 9709415821..e0125a1b92 100644 --- a/drivers/base/driver.c +++ b/drivers/base/driver.c @@ -32,6 +32,7 @@ #include <fs.h> #include <of.h> #include <linux/list.h> +#include <linux/err.h> #include <complete.h> #include <pinctrl.h> @@ -255,7 +256,7 @@ struct resource *dev_get_resource(struct device_d *dev, unsigned long type, } } - return NULL; + return ERR_PTR(-ENOENT); } void *dev_get_mem_region(struct device_d *dev, int num) @@ -263,8 +264,8 @@ void *dev_get_mem_region(struct device_d *dev, int num) struct resource *res; res = dev_get_resource(dev, IORESOURCE_MEM, num); - if (!res) - return NULL; + if (IS_ERR(res)) + return ERR_CAST(res); return (void __force *)res->start; } @@ -286,7 +287,7 @@ struct resource *dev_get_resource_by_name(struct device_d *dev, return res; } - return NULL; + return ERR_PTR(-ENOENT); } void *dev_get_mem_region_by_name(struct device_d *dev, const char *name) @@ -294,8 +295,8 @@ void *dev_get_mem_region_by_name(struct device_d *dev, const char *name) struct resource *res; res = dev_get_resource_by_name(dev, IORESOURCE_MEM, name); - if (!res) - return NULL; + if (IS_ERR(res)) + return ERR_CAST(res); return (void __force *)res->start; } @@ -306,12 +307,12 @@ void __iomem *dev_request_mem_region_by_name(struct device_d *dev, const char *n struct resource *res; res = dev_get_resource_by_name(dev, IORESOURCE_MEM, name); - if (!res) - return NULL; + if (IS_ERR(res)) + return ERR_CAST(res); res = request_iomem_region(dev_name(dev), res->start, res->end); - if (!res) - return NULL; + if (IS_ERR(res)) + return ERR_CAST(res); return (void __force __iomem *)res->start; } @@ -322,12 +323,12 @@ void __iomem *dev_request_mem_region(struct device_d *dev, int num) struct resource *res; res = dev_get_resource(dev, IORESOURCE_MEM, num); - if (!res) - return NULL; + if (IS_ERR(res)) + return ERR_CAST(res); res = request_iomem_region(dev_name(dev), res->start, res->end); - if (!res) - return NULL; + if (IS_ERR(res)) + return ERR_CAST(res); return (void __force __iomem *)res->start; } @@ -347,6 +348,8 @@ int generic_memmap_ro(struct cdev *cdev, void **map, int flags) if (flags & PROT_WRITE) return -EACCES; *map = dev_get_mem_region(cdev->dev, 0); + if (IS_ERR(*map)) + return PTR_ERR(*map); return 0; } @@ -356,6 +359,9 @@ int generic_memmap_rw(struct cdev *cdev, void **map, int flags) return -EINVAL; *map = dev_get_mem_region(cdev->dev, 0); + if (IS_ERR(*map)) + return PTR_ERR(*map); + return 0; } |