firmware: sysfb: Make sysfb_create_simplefb() return a pdev pointer

This function just returned 0 on success or an errno code on error, but it
could be useful for sysfb_init() callers to have a pointer to the device.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220607182338.344270-2-javierm@redhat.com

diff --git a/drivers/firmware/sysfb.c b/drivers/firmware/sysfb.c
index 2bfbb05..b032f40 100644 (file)
--- a/drivers/firmware/sysfb.c
+++ b/drivers/firmware/sysfb.c
@@ -46,8 +46,8 @@ static __init int sysfb_init(void)
        /* try to create a simple-framebuffer device */
        compatible = sysfb_parse_mode(si, &mode);
        if (compatible) {
-               ret = sysfb_create_simplefb(si, &mode);
-               if (!ret)
+               pd = sysfb_create_simplefb(si, &mode);
+               if (!IS_ERR(pd))
                        return 0;
        }
 

diff --git a/drivers/firmware/sysfb_simplefb.c b/drivers/firmware/sysfb_simplefb.c
index bda8712..a353e27 100644 (file)
--- a/drivers/firmware/sysfb_simplefb.c
+++ b/drivers/firmware/sysfb_simplefb.c
@@ -57,8 +57,8 @@ __init bool sysfb_parse_mode(const struct screen_info *si,
        return false;
 }
 
-__init int sysfb_create_simplefb(const struct screen_info *si,
-                                const struct simplefb_platform_data *mode)
+__init struct platform_device *sysfb_create_simplefb(const struct screen_info *si,
+                                                    const struct simplefb_platform_data *mode)
 {
        struct platform_device *pd;
        struct resource res;
@@ -76,7 +76,7 @@ __init int sysfb_create_simplefb(const struct screen_info *si,
                base |= (u64)si->ext_lfb_base << 32;
        if (!base || (u64)(resource_size_t)base != base) {
                printk(KERN_DEBUG "sysfb: inaccessible VRAM base\n");
-               return -EINVAL;
+               return ERR_PTR(-EINVAL);
        }
 
        /*
@@ -93,7 +93,7 @@ __init int sysfb_create_simplefb(const struct screen_info *si,
        length = mode->height * mode->stride;
        if (length > size) {
                printk(KERN_WARNING "sysfb: VRAM smaller than advertised\n");
-               return -EINVAL;
+               return ERR_PTR(-EINVAL);
        }
        length = PAGE_ALIGN(length);
 
@@ -104,11 +104,11 @@ __init int sysfb_create_simplefb(const struct screen_info *si,
        res.start = base;
        res.end = res.start + length - 1;
        if (res.end <= res.start)
-               return -EINVAL;
+               return ERR_PTR(-EINVAL);
 
        pd = platform_device_alloc("simple-framebuffer", 0);
        if (!pd)
-               return -ENOMEM;
+               return ERR_PTR(-ENOMEM);
 
        sysfb_apply_efi_quirks(pd);
 
@@ -124,10 +124,10 @@ __init int sysfb_create_simplefb(const struct screen_info *si,
        if (ret)
                goto err_put_device;
 
-       return 0;
+       return pd;
 
 err_put_device:
        platform_device_put(pd);
 
-       return ret;
+       return ERR_PTR(ret);
 }

diff --git a/include/linux/sysfb.h b/include/linux/sysfb.h
index b0dcfa2..708152e 100644 (file)
--- a/include/linux/sysfb.h
+++ b/include/linux/sysfb.h
@@ -72,8 +72,8 @@ static inline void sysfb_apply_efi_quirks(struct platform_device *pd)
 
 bool sysfb_parse_mode(const struct screen_info *si,
                      struct simplefb_platform_data *mode);
-int sysfb_create_simplefb(const struct screen_info *si,
-                         const struct simplefb_platform_data *mode);
+struct platform_device *sysfb_create_simplefb(const struct screen_info *si,
+                                             const struct simplefb_platform_data *mode);
 
 #else /* CONFIG_SYSFB_SIMPLE */
 
@@ -83,10 +83,10 @@ static inline bool sysfb_parse_mode(const struct screen_info *si,
        return false;
 }
 
-static inline int sysfb_create_simplefb(const struct screen_info *si,
-                                        const struct simplefb_platform_data *mode)
+static inline struct platform_device *sysfb_create_simplefb(const struct screen_info *si,
+                                                           const struct simplefb_platform_data *mode)
 {
-       return -EINVAL;
+       return ERR_PTR(-EINVAL);
 }
 
 #endif /* CONFIG_SYSFB_SIMPLE */