4.19-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit a3e620f8422832afd832ad5e20aa97d0c72bada8 ]
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 Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/soc-acpi.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/sound/soc/soc-acpi.c b/sound/soc/soc-acpi.c index b8e72b52db30..4fb29f0e561e 100644 --- a/sound/soc/soc-acpi.c +++ b/sound/soc/soc-acpi.c @@ -10,11 +10,17 @@ 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 *mach_alt;
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) { + mach_alt = mach->machine_quirk(mach); + if (!mach_alt) + continue; /* not full match, ignore */ + mach = mach_alt; + } + return mach; } }