mx3fb: Fix print format string

Started by Oleg Drokin on Aug 27, 2016 · 4 messages from 3 authors · Last reply Aug 30, 2016

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STALE3722d

open the first message on its own page

Message details and related content
%ul was probably meant as %lu since the former would print
an unsigned value and a letter l.

But in fact the whole value we are printing in u32 anyway, so
we don't need the format to be long. Therefore just drop the l
altogether.

Signed-off-by: Oleg Drokin <redacted>
---
Also do we really need 1000UL specification if we
cast to u32 anyway? Or should we drop away the cast instead?
Are pixelclocks over 4GHz possible here?

 drivers/video/fbdev/mx3fb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/video/fbdev/mx3fb.c b/drivers/video/fbdev/mx3fb.c
index f91b1db..8778e01 100644
--- a/drivers/video/fbdev/mx3fb.c
+++ b/drivers/video/fbdev/mx3fb.c
@@ -845,7 +845,7 @@ static int __set_par(struct fb_info *fbi, bool lock)
 		if (fbi->var.sync & FB_SYNC_SHARP_MODE)
 			mode = IPU_PANEL_SHARP_TFT;
 
-		dev_dbg(fbi->device, "pixclock = %ul Hz\n",
+		dev_dbg(fbi->device, "pixclock = %u Hz\n",
 			(u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL));
 
 		if (sdc_init_panel(mx3fb, mode,
-- 
2.7.4
Message details and related content
On Fri, 2016-08-26 at 23:05 -0400, Oleg Drokin wrote:
%ul was probably meant as %lu since the former would print
an unsigned value and a letter l.

But in fact the whole value we are printing in u32 anyway, so
we don't need the format to be long. Therefore just drop the l
altogether.
[]
Also do we really need 1000UL specification if we
cast to u32 anyway? Or should we drop away the cast instead?
Are pixelclocks over 4GHz possible here?
It's a debugging printk, it doesn't matter much.
Why not use "%u kHz" and drop the "* 1000UL"?
quoted hunk
diff --git a/drivers/video/fbdev/mx3fb.c b/drivers/video/fbdev/mx3fb.c
[]
quoted hunk
@@ -845,7 +845,7 @@ static int __set_par(struct fb_info *fbi, bool lock)
 		if (fbi->var.sync & FB_SYNC_SHARP_MODE)
 			mode = IPU_PANEL_SHARP_TFT;
 
-		dev_dbg(fbi->device, "pixclock = %ul Hz\n",
+		dev_dbg(fbi->device, "pixclock = %u Hz\n",
 			(u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL));
 
 		if (sdc_init_panel(mx3fb, mode,
Message details and related content
On Aug 26, 2016, at 11:18 PM, Joe Perches wrote:
On Fri, 2016-08-26 at 23:05 -0400, Oleg Drokin wrote:
quoted
%ul was probably meant as %lu since the former would print
an unsigned value and a letter l.

But in fact the whole value we are printing in u32 anyway, so
we don't need the format to be long. Therefore just drop the l
altogether.
[]
quoted
Also do we really need 1000UL specification if we
cast to u32 anyway? Or should we drop away the cast instead?
Are pixelclocks over 4GHz possible here?
It's a debugging printk, it doesn't matter much.
Why not use "%u kHz" and drop the "* 1000UL"?
I have no strong opinion on this since it's not my debugging code.

But XXX000l Hz makes zero sense either way.
quoted
diff --git a/drivers/video/fbdev/mx3fb.c b/drivers/video/fbdev/mx3fb.c
[]
quoted
@@ -845,7 +845,7 @@ static int __set_par(struct fb_info *fbi, bool lock)
 		if (fbi->var.sync & FB_SYNC_SHARP_MODE)
 			mode = IPU_PANEL_SHARP_TFT;
 
-		dev_dbg(fbi->device, "pixclock = %ul Hz\n",
+		dev_dbg(fbi->device, "pixclock = %u Hz\n",
 			(u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL));
 
 		if (sdc_init_panel(mx3fb, mode,
                                   (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
I guess it's printed like that to match sdc_init_panel argument exactly?
Message details and related content
On 27/08/16 06:05, Oleg Drokin wrote:
quoted hunk
%ul was probably meant as %lu since the former would print
an unsigned value and a letter l.

But in fact the whole value we are printing in u32 anyway, so
we don't need the format to be long. Therefore just drop the l
altogether.

Signed-off-by: Oleg Drokin <redacted>
---
Also do we really need 1000UL specification if we
cast to u32 anyway? Or should we drop away the cast instead?
Are pixelclocks over 4GHz possible here?

 drivers/video/fbdev/mx3fb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/video/fbdev/mx3fb.c b/drivers/video/fbdev/mx3fb.c
index f91b1db..8778e01 100644
--- a/drivers/video/fbdev/mx3fb.c
+++ b/drivers/video/fbdev/mx3fb.c
@@ -845,7 +845,7 @@ static int __set_par(struct fb_info *fbi, bool lock)
 		if (fbi->var.sync & FB_SYNC_SHARP_MODE)
 			mode = IPU_PANEL_SHARP_TFT;
 
-		dev_dbg(fbi->device, "pixclock = %ul Hz\n",
+		dev_dbg(fbi->device, "pixclock = %u Hz\n",
 			(u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL));
 
 		if (sdc_init_panel(mx3fb, mode,
Thanks, queued for 4.9.

 Tomi
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