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[PATCH] vesafb: Fix return code of vesafb_setcolreg

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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>
This commit is contained in:
Antonino A. Daplas 2006-06-26 00:26:40 -07:00 committed by Linus Torvalds
parent f71689e413
commit 313ca22f0b
1 changed files with 11 additions and 5 deletions
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16
drivers/video/vesafb.c
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@ -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 = {