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drm/nouveau/gpio: place upper limit on using old-school tvdac bios data 

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2012-11-21 15:04:51 +10:00
parent 9da49599a7
commit 66bb7e1d67
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/nouveau/core/subdev/bios/gpio.c
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@ -101,8 +101,8 @@ dcb_gpio_parse(struct nouveau_bios *bios, int idx, u8 func, u8 line,
}
/* DCB 2.2, fixed TVDAC GPIO data */
if ((entry = dcb_table(bios, &ver, &hdr, &cnt, &len)) && ver >= 0x22) {
if (func == DCB_GPIO_TVDAC0) {
if ((entry = dcb_table(bios, &ver, &hdr, &cnt, &len))) {
if (ver >= 0x22 && ver < 0x30 && func == DCB_GPIO_TVDAC0) {
u8 conf = nv_ro08(bios, entry - 5);
u8 addr = nv_ro08(bios, entry - 4);
if (conf & 0x01) {