[alsa-devel] [PATCH] ASoC: acpi: fix: continue searching when machine is ignored
The machine_quirk may return NULL which means the acpi entries should be skipped and search for next matched entry is needed, here add return check here and continue for NULL case.
Signed-off-by: Keyon Jie yang.jie@linux.intel.com --- sound/soc/soc-acpi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/sound/soc/soc-acpi.c b/sound/soc/soc-acpi.c index b8e72b52db30..faf8941363e4 100644 --- a/sound/soc/soc-acpi.c +++ b/sound/soc/soc-acpi.c @@ -15,7 +15,10 @@ snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines) if (acpi_dev_present(mach->id, NULL, -1)) { if (mach->machine_quirk) mach = mach->machine_quirk(mach); - return mach; + + /* return matched machine, continue otherwise */ + if (mach) + return mach; } } return NULL;
On 10/31/18 9:36 PM, Keyon Jie wrote:
The machine_quirk may return NULL which means the acpi entries should be skipped and search for next matched entry is needed, here add return check here and continue for NULL case.
Nice catch, this was missed in the other patchset since the ACPI ID to ignore was the last in the table...
Acked-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
Signed-off-by: Keyon Jie yang.jie@linux.intel.com
sound/soc/soc-acpi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/sound/soc/soc-acpi.c b/sound/soc/soc-acpi.c index b8e72b52db30..faf8941363e4 100644 --- a/sound/soc/soc-acpi.c +++ b/sound/soc/soc-acpi.c @@ -15,7 +15,10 @@ snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines) if (acpi_dev_present(mach->id, NULL, -1)) { if (mach->machine_quirk) mach = mach->machine_quirk(mach);
return mach;
/* return matched machine, continue otherwise */if (mach)return mach;
Hi Keyon,
The machine_quirk may return NULL which means the acpi entries should be skipped and search for next matched entry is needed, here add return check here and continue for NULL case.
Nice catch, this was missed in the other patchset since the ACPI ID to ignore was the last in the table...
Acked-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
I was wondering if this patch was merged, but actually it's good Mark wasn't copied on this one: the code doesn't quite work as intended and shouldn't be merged as is.
Chintan and I see an oops and reboot on KBL Chromebooks, when the quirk returns NULL, the mach variable becomes NULL and cannot be modified with pointer arithmetic (which doesn't show with the diff format).
It's very likely btw that anyone trying a recent kernel on these devices would not see the audio driver probe at all, so we do want to try other entries - but of course without this nasty side effect. I will submit a v2 when I've sorted out other problems on Chrome.
Thanks
-Pierre
Signed-off-by: Keyon Jie yang.jie@linux.intel.com
sound/soc/soc-acpi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/sound/soc/soc-acpi.c b/sound/soc/soc-acpi.c index b8e72b52db30..faf8941363e4 100644 --- a/sound/soc/soc-acpi.c +++ b/sound/soc/soc-acpi.c @@ -15,7 +15,10 @@ snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines) if (acpi_dev_present(mach->id, NULL, -1)) { if (mach->machine_quirk) mach = mach->machine_quirk(mach); - return mach;
+ /* return matched machine, continue otherwise */ + if (mach) + return mach; } } return NULL;
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On 2018/11/16 上午7:01, Pierre-Louis Bossart wrote:
Hi Keyon,
The machine_quirk may return NULL which means the acpi entries should be skipped and search for next matched entry is needed, here add return check here and continue for NULL case.
Nice catch, this was missed in the other patchset since the ACPI ID to ignore was the last in the table...
Acked-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
I was wondering if this patch was merged, but actually it's good Mark wasn't copied on this one: the code doesn't quite work as intended and shouldn't be merged as is.
Chintan and I see an oops and reboot on KBL Chromebooks, when the quirk returns NULL, the mach variable becomes NULL and cannot be modified with pointer arithmetic (which doesn't show with the diff format).
Ah, yeap, I omitted this, so we may need introduce a new pointer to fix that, something like this:
diff --git a/sound/soc/soc-acpi.c b/sound/soc/soc-acpi.c index b8e72b52db30..0d967d0ca222 100644 --- a/sound/soc/soc-acpi.c +++ b/sound/soc/soc-acpi.c @@ -10,11 +10,22 @@ struct snd_soc_acpi_mach * snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines) { struct snd_soc_acpi_mach *mach; + struct snd_soc_acpi_mach *quirk_mach = NULL;
for (mach = machines; mach->id[0]; mach++) { if (acpi_dev_present(mach->id, NULL, -1)) { - if (mach->machine_quirk) - mach = mach->machine_quirk(mach); + if (mach->machine_quirk) { + quirk_mach = mach->machine_quirk(mach); + + if (!quirk_mach) + /* skip if no quirk matched */ + continue; + else + /* return quirk matched machine */ + return quirk_mach; + } + + /* return acpi matched machine directly */ return mach; } }
It's very likely btw that anyone trying a recent kernel on these devices would not see the audio driver probe at all, so we do want to try other entries - but of course without this nasty side effect. I will submit a v2 when I've sorted out other problems on Chrome.
That's fine.
Thanks, ~Keyon
Thanks
-Pierre
Signed-off-by: Keyon Jie yang.jie@linux.intel.com
sound/soc/soc-acpi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/sound/soc/soc-acpi.c b/sound/soc/soc-acpi.c index b8e72b52db30..faf8941363e4 100644 --- a/sound/soc/soc-acpi.c +++ b/sound/soc/soc-acpi.c @@ -15,7 +15,10 @@ snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines) if (acpi_dev_present(mach->id, NULL, -1)) { if (mach->machine_quirk) mach = mach->machine_quirk(mach); - return mach;
+ /* return matched machine, continue otherwise */ + if (mach) + return mach; } } return NULL;
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On 11/15/18 9:03 PM, Keyon Jie wrote:
On 2018/11/16 上午7:01, Pierre-Louis Bossart wrote:
Hi Keyon,
The machine_quirk may return NULL which means the acpi entries should be skipped and search for next matched entry is needed, here add return check here and continue for NULL case.
Nice catch, this was missed in the other patchset since the ACPI ID to ignore was the last in the table...
Acked-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
I was wondering if this patch was merged, but actually it's good Mark wasn't copied on this one: the code doesn't quite work as intended and shouldn't be merged as is.
Chintan and I see an oops and reboot on KBL Chromebooks, when the quirk returns NULL, the mach variable becomes NULL and cannot be modified with pointer arithmetic (which doesn't show with the diff format).
Ah, yeap, I omitted this, so we may need introduce a new pointer to fix that, something like this:
diff --git a/sound/soc/soc-acpi.c b/sound/soc/soc-acpi.c index b8e72b52db30..0d967d0ca222 100644 --- a/sound/soc/soc-acpi.c +++ b/sound/soc/soc-acpi.c @@ -10,11 +10,22 @@ struct snd_soc_acpi_mach * snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines) { struct snd_soc_acpi_mach *mach; + struct snd_soc_acpi_mach *quirk_mach = NULL;
for (mach = machines; mach->id[0]; mach++) { if (acpi_dev_present(mach->id, NULL, -1)) { - if (mach->machine_quirk) - mach = mach->machine_quirk(mach); + if (mach->machine_quirk) { + quirk_mach = mach->machine_quirk(mach);
+ if (!quirk_mach) + /* skip if no quirk matched */ + continue; + else + /* return quirk matched machine */ + return quirk_mach; + }
+ /* return acpi matched machine directly */
Yes, we tried something similar, see https://github.com/plbossart/sound/commit/9acfd674141bfc0a0bdadda1c3f7b16cc6...
return mach; } }
It's very likely btw that anyone trying a recent kernel on these devices would not see the audio driver probe at all, so we do want to try other entries - but of course without this nasty side effect. I will submit a v2 when I've sorted out other problems on Chrome.
That's fine.
Thanks, ~Keyon
Thanks
-Pierre
Signed-off-by: Keyon Jie yang.jie@linux.intel.com
sound/soc/soc-acpi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/sound/soc/soc-acpi.c b/sound/soc/soc-acpi.c index b8e72b52db30..faf8941363e4 100644 --- a/sound/soc/soc-acpi.c +++ b/sound/soc/soc-acpi.c @@ -15,7 +15,10 @@ snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines) if (acpi_dev_present(mach->id, NULL, -1)) { if (mach->machine_quirk) mach = mach->machine_quirk(mach); - return mach;
+ /* return matched machine, continue otherwise */ + if (mach) + return mach; } } return NULL;
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participants (2)
-
Keyon Jie -
Pierre-Louis Bossart