diff options
Diffstat (limited to 'sound/soc/intel/skylake/skl-nhlt.c')
| -rw-r--r-- | sound/soc/intel/skylake/skl-nhlt.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sound/soc/intel/skylake/skl-nhlt.c b/sound/soc/intel/skylake/skl-nhlt.c index e7d766d56c8e..d14c50a60289 100644 --- a/sound/soc/intel/skylake/skl-nhlt.c +++ b/sound/soc/intel/skylake/skl-nhlt.c @@ -20,6 +20,8 @@ #include <linux/pci.h> #include "skl.h" +#define NHLT_ACPI_HEADER_SIG "NHLT" + /* Unique identification for getting NHLT blobs */ static guid_t osc_guid = GUID_INIT(0xA69F886E, 0x6CEB, 0x4594, @@ -45,6 +47,13 @@ struct nhlt_acpi_table *skl_nhlt_init(struct device *dev) memremap(nhlt_ptr->min_addr, nhlt_ptr->length, MEMREMAP_WB); ACPI_FREE(obj); + if (nhlt_table && (strncmp(nhlt_table->header.signature, + NHLT_ACPI_HEADER_SIG, + strlen(NHLT_ACPI_HEADER_SIG)) != 0)) { + memunmap(nhlt_table); + dev_err(dev, "NHLT ACPI header signature incorrect\n"); + return NULL; + } return nhlt_table; } |