Re: [PATCH v3 1/5] firmware: sysfb: Make sysfb_create_simplefb() return a pdev pointer

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Am 20.04.22 um 10:52 schrieb Javier Martinez Canillas:
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@xxxxxxxxxx>
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>

Reviewed-by: Thomas Zimmermann <tzimmermann@xxxxxxx>

---

(no changes since v2)

Changes in v2:
- Rebase on top of latest drm-misc-next and fix conflicts (Daniel Vetter).

  drivers/firmware/sysfb.c          |  4 ++--
  drivers/firmware/sysfb_simplefb.c | 16 ++++++++--------
  include/linux/sysfb.h             | 10 +++++-----
  3 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/drivers/firmware/sysfb.c b/drivers/firmware/sysfb.c
index 2bfbb05f7d89..b032f40a92de 100644
--- 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 bda8712bfd8c..a353e27f83f5 100644
--- 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 b0dcfa26d07b..708152e9037b 100644
--- 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 */

--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev

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