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    Subject[PATCH] ASoC: Intel: fix possible acpi enumeration panic
    Date
    A crash can occur on some platforms where adsp is enumerated but codec
    is not matched. Check that the codec_id string is valid before
    attempting to match.

    Signed-off-by: Kevin Strasser <kevin.strasser@intel.com>
    ---
    sound/soc/intel/sst/sst_acpi.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/sound/soc/intel/sst/sst_acpi.c b/sound/soc/intel/sst/sst_acpi.c
    index 31124aa..dd72e58 100644
    --- a/sound/soc/intel/sst/sst_acpi.c
    +++ b/sound/soc/intel/sst/sst_acpi.c
    @@ -236,7 +236,7 @@ static struct sst_machines *sst_acpi_find_machine(
    struct sst_machines *mach;
    bool found = false;

    - for (mach = machines; mach->codec_id; mach++)
    + for (mach = machines; mach->codec_id[0]; mach++)
    if (ACPI_SUCCESS(acpi_get_devices(mach->codec_id,
    sst_acpi_mach_match,
    &found, NULL)) && found)
    --
    1.9.1


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