|
In my experiment, sometimes, the bt878 will not send interrupt
to interrupt controller after something happened.
(It appeared easily when bt878 shared IRQ with many other
drivers)
I found there is something error in the interrupt handler of
alsa-bt87x.
so, I wrote an patch for it.
(Ref : In the Bt878/879 document, section of
interrupt status register says that " To clear the interrupts, read this
register, then write the same data back.")
jjhuang --- alsa-driver-1.0.11/alsa-kernel/pci/bt87x.c 2006-03-13
18:36:44.000000000 +0800
+++ alsa-driver-1.0.11-fix-bug/alsa-kernel/pci/bt87x.c 2006-09-18 17:44:43.000000000 +0800 @@ -277,7 +277,10 @@ status = snd_bt87x_readl(chip, REG_INT_STAT); irq_status = status & chip->interrupt_mask; if (!irq_status) - return IRQ_NONE; + { + snd_bt87x_writel (chip, REG_INT_STAT, status); + return IRQ_NONE; + } snd_bt87x_writel(chip, REG_INT_STAT, irq_status); if (irq_status & ERROR_INTERRUPTS) { |
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