diff options
Diffstat (limited to 'arch/i386/boot/apm.c')
| -rw-r--r-- | arch/i386/boot/apm.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/i386/boot/apm.c b/arch/i386/boot/apm.c index a34087c370c0..eab50c55a3a5 100644 --- a/arch/i386/boot/apm.c +++ b/arch/i386/boot/apm.c @@ -40,14 +40,15 @@ int query_apm_bios(void) if (bx != 0x504d) /* "PM" signature */ return -1; - if (cx & 0x02) /* 32 bits supported? */ + if (!(cx & 0x02)) /* 32 bits supported? */ return -1; /* Disconnect first, just in case */ ax = 0x5304; + bx = 0; asm volatile("pushl %%ebp ; int $0x15 ; popl %%ebp" - : "+a" (ax) - : : "ebx", "ecx", "edx", "esi", "edi"); + : "+a" (ax), "+b" (bx) + : : "ecx", "edx", "esi", "edi"); /* Paranoia */ ebx = esi = 0; |