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authorAntonino A. Daplas <adaplas@gmail.com>2006-06-26 00:26:40 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-26 09:58:30 -0700
commit313ca22f0bfab792adeb447146d9cb86536c64d3 (patch)
tree2a8855eec50beef14a6a4e4ea122cae3e16c9c4f
parentf71689e4139a91c98cc476240aca40bd091d4538 (diff)
[PATCH] vesafb: Fix return code of vesafb_setcolreg
If the hardware palette cannot be accessed, make vesafb_setcolreg return a nonzero value. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/video/vesafb.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/video/vesafb.c b/drivers/video/vesafb.c
index 2fbaa8484f8..eff2ebcf1f7 100644
--- a/drivers/video/vesafb.c
+++ b/drivers/video/vesafb.c
@@ -80,10 +80,11 @@ static int vesafb_pan_display(struct fb_var_screeninfo *var,
return 0;
}
-static void vesa_setpalette(int regno, unsigned red, unsigned green,
+static int vesa_setpalette(int regno, unsigned red, unsigned green,
unsigned blue)
{
int shift = 16 - depth;
+ int err = -EINVAL;
#ifdef __i386__
struct { u_char blue, green, red, pad; } entry;
@@ -102,7 +103,7 @@ static void vesa_setpalette(int regno, unsigned red, unsigned green,
"d" (regno), /* EDX */
"D" (&entry), /* EDI */
"S" (&pmi_pal)); /* ESI */
- return;
+ err = 0;
}
#endif
@@ -110,18 +111,23 @@ static void vesa_setpalette(int regno, unsigned red, unsigned green,
* without protected mode interface and if VGA compatible,
* try VGA registers...
*/
- if (vga_compat) {
+ if (err && vga_compat) {
outb_p(regno, dac_reg);
outb_p(red >> shift, dac_val);
outb_p(green >> shift, dac_val);
outb_p(blue >> shift, dac_val);
+ err = 0;
}
+
+ return err;
}
static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info)
{
+ int err = 0;
+
/*
* Set a single color register. The values supplied are
* already rounded down to the hardware's capabilities
@@ -133,7 +139,7 @@ static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
return 1;
if (info->var.bits_per_pixel == 8)
- vesa_setpalette(regno,red,green,blue);
+ err = vesa_setpalette(regno,red,green,blue);
else if (regno < 16) {
switch (info->var.bits_per_pixel) {
case 16:
@@ -164,7 +170,7 @@ static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
}
}
- return 0;
+ return err;
}
static struct fb_ops vesafb_ops = {