ASoC: cs-amp-lib: Fix NULL pointer crash if efi.get_variable is NULL

Call efi_rt_services_supported() to check that efi.get_variable exists before calling it. Signed-off-by: Richard Fitzgerald <[email protected]> Fixes: 1cad872 ("ASoC: cs-amp-lib: Add helpers for factory calibration data") Link: https://patch.msgid.link/[email protected] Signed-off-by: Mark Brown <[email protected]>
wafgo · Aug 5, 2024 · dc26808 · dc26808
1 parent 93afd02
commit dc26808
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/sound/soc/codecs/cs-amp-lib.c b/sound/soc/codecs/cs-amp-lib.c
@@ -108,7 +108,7 @@ static efi_status_t cs_amp_get_efi_variable(efi_char16_t *name,
 
 	KUNIT_STATIC_STUB_REDIRECT(cs_amp_get_efi_variable, name, guid, size, buf);
 
-	if (IS_ENABLED(CONFIG_EFI))
+	if (efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
 		return efi.get_variable(name, guid, &attr, size, buf);
 
 	return EFI_NOT_FOUND;