src/patches/suse-2.6.27.31/patches.drivers/alsa-post-ga-hda-single-cmd-concurrent-access

   1 From: Takashi Iwai <tiwai@suse.de>
   2 Subject: ALSA: hda - Allow concurrent RIRB access in single_cmd mode
   3 Patch-mainline:
   4 References: bnc#502903
   5
   6 In the single_cmd mode, the current driver code doesn't do any update
   7 for RIRB just for any safety reason.  But, actually the RIRB and
   8 single_cmd mode don't conflict.  Unsolicited events can be delivered
   9 even while using the single_cmd mode.
  10
  11 This patch allows the handling of unsolicited events with single_cmd
  12 mode, just always checking RIRB independent from single_cmd flag.
  13
  14 Signed-off-by: Takashi Iwai <tiwai@suse.de>
  15
  16 ---
  17  sound/pci/hda/hda_intel.c |   13 +++++--------
  18  1 file changed, 5 insertions(+), 8 deletions(-)
  19
  20 --- a/sound/pci/hda/hda_intel.c
  21 +++ b/sound/pci/hda/hda_intel.c
  22 @@ -868,8 +868,7 @@ static void azx_init_chip(struct azx *ch
  23         azx_int_enable(chip);
  24
  25         /* initialize the codec command I/O */
  26 -       if (!chip->single_cmd)
  27 -               azx_init_cmd_io(chip);
  28 +       azx_init_cmd_io(chip);
  29
  30         /* program the position buffer */
  31         azx_writel(chip, DPLBASE, (u32)chip->posbuf.addr);
  32 @@ -989,7 +988,7 @@ static irqreturn_t azx_interrupt(int irq
  33         /* clear rirb int */
  34         status = azx_readb(chip, RIRBSTS);
  35         if (status & RIRB_INT_MASK) {
  36 -               if (!chip->single_cmd && (status & RIRB_INT_RESPONSE))
  37 +               if (status & RIRB_INT_RESPONSE)
  38                         azx_update_rirb(chip);
  39                 azx_writeb(chip, RIRBSTS, RIRB_INT_MASK);
  40         }
  41 @@ -2272,11 +2271,9 @@ static int __devinit azx_create(struct s
  42                 goto errout;
  43         }
  44         /* allocate CORB/RIRB */
  45 -       if (!chip->single_cmd) {
  46 -               err = azx_alloc_cmd_io(chip);
  47 -               if (err < 0)
  48 -                       goto errout;
  49 -       }
  50 +       err = azx_alloc_cmd_io(chip);
  51 +       if (err < 0)
  52 +               goto errout;
  53
  54         /* initialize streams */
  55         azx_init_stream(chip);