diff options
Diffstat (limited to 'arch/i386/kernel/apm.c')
| -rw-r--r-- | arch/i386/kernel/apm.c | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c index d0b488056cc..2d793d4aef1 100644 --- a/arch/i386/kernel/apm.c +++ b/arch/i386/kernel/apm.c @@ -1064,22 +1064,23 @@ static int apm_engage_power_management(u_short device, int enable) static int apm_console_blank(int blank) { - int error; - u_short state; + int error, i; + u_short state; + static const u_short dev[3] = { 0x100, 0x1FF, 0x101 }; state = blank ? APM_STATE_STANDBY : APM_STATE_READY; - /* Blank the first display device */ - error = set_power_state(0x100, state); - if ((error != APM_SUCCESS) && (error != APM_NO_ERROR)) { - /* try to blank them all instead */ - error = set_power_state(0x1ff, state); - if ((error != APM_SUCCESS) && (error != APM_NO_ERROR)) - /* try to blank device one instead */ - error = set_power_state(0x101, state); + + for (i = 0; i < ARRAY_SIZE(dev); i++) { + error = set_power_state(dev[i], state); + + if ((error == APM_SUCCESS) || (error == APM_NO_ERROR)) + return 1; + + if (error == APM_NOT_ENGAGED) + break; } - if ((error == APM_SUCCESS) || (error == APM_NO_ERROR)) - return 1; - if (error == APM_NOT_ENGAGED) { + + if (error == APM_NOT_ENGAGED && state != APM_STATE_READY) { static int tried; int eng_error; if (tried++ == 0) { |