Re: i810_audio driver v0.19 still freezes machine

[Doug Ledford]

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Mark Hahn wrote:

>>So it hangs with artsd then?  Get me the output of ps ax | grep artsd and 
>>that will tell me the artsd configuration on both machines.  Also, just 
>>using artsd is all you are doing, not anything else to trigger the lockup?
>>
> 
> to be honest, I haven't a clue - I've never looked at audio
> stuff much.  on the bad machine, it plays a few silly kde
> sound effects, and then everything stops.  (RH 7.2, 2.4.18-pre2
> and your i810.c)

Duh!!!  All of the reports thus far have been artsd.  My guess is that we 
are getting a signal during drain_dac() and returning with -ERESTARTSYS on 
close.  Well, as it turns out i810_release() isn't checking the return value 
of drain_dac() and if we take a signal in drain_dac() then i810_release() 
releases the card's data structs without actually shutting down the card: 
Lockup.  So, try this patch and see if it doesn't solve your problem.

-- 

  Doug Ledford <[e-mail]>  http://people.redhat.com/dledford
       Please check my web site for aic7xxx updates/answers before
                       e-mailing me about problems

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--- i810_audio.c.19	Wed Jan  9 04:58:41 2002
+++ i810_audio.c.20	Thu Jan 10 16:32:29 2002
@@ -1739,7 +1739,8 @@ static int i810_ioctl(struct inode *inod
 #endif
 		if (dmabuf->enable != DAC_RUNNING || file->f_flags & O_NONBLOCK)
 			return 0;
-		drain_dac(state);
+		if(val = drain_dac(state))
+			return val;
 		dmabuf->total_bytes = 0;
 		return 0;
 
@@ -2417,12 +2418,16 @@ static int i810_release(struct inode *in
 	struct i810_card *card = state->card;
 	struct dmabuf *dmabuf = &state->dmabuf;
 	unsigned long flags;
+	int ret;
 
 	lock_kernel();
 
 	/* stop DMA state machine and free DMA buffers/channels */
 	if(dmabuf->trigger & PCM_ENABLE_OUTPUT) {
-		drain_dac(state);
+		if(ret = drain_dac(state)) {
+			unlock_kernel();
+			return ret;
+		}
 	}
 	if(dmabuf->trigger & PCM_ENABLE_INPUT) {
 		stop_adc(state);

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