Re: 2.6.12-mm1

[Takashi Iwai <tiwai@suse.de>]

At Tue, 21 Jun 2005 14:40:21 +0200,
Brice Goglin wrote:
> 
> Brice Goglin a écrit :
> > Hi Andrew,
> > 
> > I got this oops during boot.
> > I copied it by hand since my machine crashed soon after (because of yenta).
> > It doesn't occur when snd_maestro3 is skipped by discover.
> > 
> > divide error: 0000 [#1]
> > PREEMPT
> > ...
> > CPU: 0
> > EIP: 0060:[<e8957f9f>] Not tainted VLI
> > EFLAGS: 00000282 (2.6.12-mm1=LoulousMobiles)
> > EIP is at and_m3_enable_ints+0x1f/0x40 [snd_maestro3]
> > eax: 00000050 ebx: 00002400 ecx: 00000050 edx: 00002418
> > esi: 00002418 edi: 00000000 ebp: 000000f0 esp: e6f5ce54
> > ds: 007b es: 007b ss: 0068
> > Process modprobe (pid: 2405, threadinfo=e6f5c000, task=e7a31570)
> > ...
> > Call trace:
> >  snd_m3_create+0x303/0x405 [snd_maestro3]
> 
> The problem comes from git-alsa.patch.
> Adding HV_INT_ENABLE to outw in snd_m3_enable_ints (in
> sound/pci/maestro3.c) makes it generate a divide error
> on my laptop.
> 
> The attached patch reverts this and fixes my problem.
> 
> Signed-off-by: Brice Goglin <Brice.Goglin@ens-lyon.org>

Well, this disables the h/w volume controls completely, so it's not a
generic solution.

Does the patch below have any improvement?


Takashi

--- linux/sound/pci/maestro3.c	20 May 2005 17:39:26 -0000	1.80
+++ linux/sound/pci/maestro3.c	21 Jun 2005 16:26:19 -0000
@@ -1050,11 +1050,6 @@
  * lowlevel functions
  */
 
-#define big_mdelay(msec) do {\
-	set_current_state(TASK_UNINTERRUPTIBLE);\
-	schedule_timeout(((msec) * HZ) / 1000);\
-} while (0)
-	
 inline static void snd_m3_outw(m3_t *chip, u16 value, unsigned long reg)
 {
 	outw(value, chip->iobase + reg);
@@ -1096,7 +1091,7 @@
 static void snd_m3_assp_halt(m3_t *chip)
 {
 	chip->reset_state = snd_m3_inb(chip, DSP_PORT_CONTROL_REG_B) & ~REGB_STOP_CLOCK;
-	big_mdelay(10);
+	msleep(10);
 	snd_m3_outb(chip, chip->reset_state & ~REGB_ENABLE_RESET, DSP_PORT_CONTROL_REG_B);
 }
 
@@ -2108,9 +2103,9 @@
 	 */
 	tmp = inw(io + RING_BUS_CTRL_A);
 	outw(RAC_SDFS_ENABLE|LAC_SDFS_ENABLE, io + RING_BUS_CTRL_A);
-	big_mdelay(20);
+	msleep(20);
 	outw(tmp, io + RING_BUS_CTRL_A);
-	big_mdelay(50);
+	msleep(50);
 #endif
 }
 
@@ -2589,7 +2584,7 @@
 	snd_pcm_suspend_all(chip->pcm);
 	snd_ac97_suspend(chip->ac97);
 
-	big_mdelay(10); /* give the assp a chance to idle.. */
+	msleep(10); /* give the assp a chance to idle.. */
 
 	snd_m3_assp_halt(chip);
 
@@ -2697,6 +2692,8 @@
 	}
 
 	spin_lock_init(&chip->reg_lock);
+	spin_lock_init(&chip->ac97_lock);
+
 	switch (pci->device) {
 	case PCI_DEVICE_ID_ESS_ALLEGRO:
 	case PCI_DEVICE_ID_ESS_ALLEGRO_1:
@@ -2765,6 +2762,8 @@
 	snd_m3_assp_init(chip);
 	snd_m3_amp_enable(chip, 1);
 
+	tasklet_init(&chip->hwvol_tq, snd_m3_update_hw_volume, (unsigned long)chip);
+
 	if (request_irq(pci->irq, snd_m3_interrupt, SA_INTERRUPT|SA_SHIRQ,
 			card->driver, (void *)chip)) {
 		snd_printk("unable to grab IRQ %d\n", pci->irq);
@@ -2786,9 +2785,6 @@
 		return err;
 	}
 
-	spin_lock_init(&chip->ac97_lock);
-	tasklet_init(&chip->hwvol_tq, snd_m3_update_hw_volume, (unsigned long)chip);
-
 	if ((err = snd_m3_mixer(chip)) < 0)
 		return err;