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authorAkinobu Mita <akinobu.mita@gmail.com>2009-07-01 11:13:07 +0900
committerH. Peter Anvin <hpa@zytor.com>2009-07-04 12:56:32 -0700
commitfebe04de3be4bf66f9339d8847db2806d99fd164 (patch)
treee1143d42fc562326196b3eeead563c70449dc019 /arch/x86/boot/video-bios.c
parent22a26e6663008e1fc4d1467aaff7e775124bce31 (diff)
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x86: fix usage of bios intcall()
Some intcall() misuses the input biosregs as output in cf06de7b9cdd3efee7a59dced1977b3c21d43732 This fixes the problem vga=ask boot option doesn't show enough modes. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> LKML-Reference: <20090701021307.GA3127@localhost.localdomain> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/boot/video-bios.c')
-rw-r--r--arch/x86/boot/video-bios.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/boot/video-bios.c b/arch/x86/boot/video-bios.c
index d660be4..49e0c18 100644
--- a/arch/x86/boot/video-bios.c
+++ b/arch/x86/boot/video-bios.c
@@ -37,14 +37,13 @@ static int set_bios_mode(u8 mode)
ireg.al = mode; /* AH=0x00 Set Video Mode */
intcall(0x10, &ireg, NULL);
-
ireg.ah = 0x0f; /* Get Current Video Mode */
intcall(0x10, &ireg, &oreg);
do_restore = 1; /* Assume video contents were lost */
/* Not all BIOSes are clean with the top bit */
- new_mode = ireg.al & 0x7f;
+ new_mode = oreg.al & 0x7f;
if (new_mode == mode)
return 0; /* Mode change OK */