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ASoC: SOF: Intel: hda: add sanity check on SSP index reported by NHLT 

We should have a limited trust in the BIOS and verify that the SSP
index reported in NHLT is valid for each platform.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220725195343.145603-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2022-07-25 14:53:41 -05:00 committed by Mark Brown
parent be0aa8d4b0
commit e516995050
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1 changed files with 7 additions and 0 deletions
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7
sound/soc/sof/intel/hda.c
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@ -1527,6 +1527,7 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev)
if (tplg_fixup &&
mach->tplg_quirk_mask & SND_SOC_ACPI_TPLG_INTEL_SSP_NUMBER &&
mach->mach_params.i2s_link_mask) {
const struct sof_intel_dsp_desc *chip = get_chip_info(sdev->pdata);
int ssp_num;
if (hweight_long(mach->mach_params.i2s_link_mask) > 1 &&
@ -1536,6 +1537,12 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev)
/* fls returns 1-based results, SSPs indices are 0-based */
ssp_num = fls(mach->mach_params.i2s_link_mask) - 1;
if (ssp_num >= chip->ssp_count) {
dev_err(sdev->dev, "Invalid SSP %d, max on this platform is %d\n",
ssp_num, chip->ssp_count);
return NULL;
}
tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,
"%s%s%d",
sof_pdata->tplg_filename,