[Qemu-devel] [PATCH] intel-hda: fix codec addressing.

[Qemu-devel] [PATCH] intel-hda: fix codec addressing.

[Gerd Hoffmann]

The HDA bus supports up to 15 codecs, with addresses 0 ... 14.
We get that wrong in two places:

 * When handing out addresses we accept address 15 as valid.
 * The bitmasks for two registers (WAKEEN and STATESTS) don't
   have bit 14 set.

This patch fixes it.

[ v2: codestyle: add braces ]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/intel-hda.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/hw/intel-hda.c b/hw/intel-hda.c
index 9018280..4e14447 100644
--- a/hw/intel-hda.c
+++ b/hw/intel-hda.c
@@ -56,8 +56,9 @@ static int hda_codec_dev_init(DeviceState *qdev, DeviceInfo *base)
     if (dev->cad == -1) {
         dev->cad = bus->next_cad;
     }
-    if (dev->cad > 15)
+    if (dev->cad >= 15) {
         return -1;
+    }
     bus->next_cad = dev->cad + 1;
     return info->init(dev);
 }
@@ -634,15 +635,15 @@ static const struct IntelHDAReg regtab[] = {
     [ ICH6_REG_WAKEEN ] = {
         .name     = "WAKEEN",
         .size     = 2,
-        .wmask    = 0x3fff,
+        .wmask    = 0x7fff,
         .offset   = offsetof(IntelHDAState, wake_en),
         .whandler = intel_hda_set_wake_en,
     },
     [ ICH6_REG_STATESTS ] = {
         .name     = "STATESTS",
         .size     = 2,
-        .wmask    = 0x3fff,
-        .wclear   = 0x3fff,
+        .wmask    = 0x7fff,
+        .wclear   = 0x7fff,
         .offset   = offsetof(IntelHDAState, state_sts),
         .whandler = intel_hda_set_state_sts,
     },
-- 
1.7.1

[Qemu-devel] Re: [PATCH] intel-hda: fix codec addressing.

[malc]

On Tue, 9 Nov 2010, Gerd Hoffmann wrote:

> The HDA bus supports up to 15 codecs, with addresses 0 ... 14.
> We get that wrong in two places:
> 
>  * When handing out addresses we accept address 15 as valid.
>  * The bitmasks for two registers (WAKEEN and STATESTS) don't
>    have bit 14 set.
> 
> This patch fixes it.
> 
> [ v2: codestyle: add braces ]

Applied.

[..snip..]

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