[PATCH] v4l: 797: more intellect on clearing in bits on irq lock

- More intellect on clearing in bits on irq lock.

Signed-off-by: Nickolay V. Shmyrev <<nshmyrev@yandex.ru>>
Signed-off-by: Nickolay V. Shmyrev <nshmyrev@yandex.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 15 insertions, 3 deletions

diff --git a/drivers/media/video/bttv-driver.c b/drivers/media/video/bttv-driver.c
index 504d717b1158..058b923b4b13 100644
--- a/drivers/media/video/bttv-driver.c
+++ b/drivers/media/video/bttv-driver.c
@@ -3736,10 +3736,22 @@ static irqreturn_t bttv_irq(int irq, void *dev_id, struct pt_regs * regs)
 
                 count++;
                 if (count > 4) {
-                        btwrite(0, BT848_INT_MASK);
-                        printk(KERN_ERR
-                               "bttv%d: IRQ lockup, cleared int mask [", btv->c.nr);
+
+                        if (count > 8 || !(astat & BT848_INT_GPINT)) {
+                                btwrite(0, BT848_INT_MASK);
+
+                                printk(KERN_ERR
+                                           "bttv%d: IRQ lockup, cleared int mask [", btv->c.nr);
+                        } else {
+                                printk(KERN_ERR
+                                           "bttv%d: IRQ lockup, clearing GPINT from int mask [", btv->c.nr);
+
+                                btwrite(btread(BT848_INT_MASK) & (-1 ^ BT848_INT_GPINT),
+                                                BT848_INT_MASK);
+                        };
+
                         bttv_print_irqbits(stat,astat);
+
                         printk("]\n");
                 }
         }