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

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Call efi_rt_services_supported() to check that efi.get_variable exists
before calling it.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Fixes: 1cad8725f2b9 ("ASoC: cs-amp-lib: Add helpers for factory calibration data")
Link: https://patch.msgid.link/20240805114222.15722-1-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Richard Fitzgerald 2024-08-05 12:42:22 +01:00 committed by Mark Brown
parent 93afd028fb
commit dc268085e4
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1 changed files with 1 additions and 1 deletions
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sound/soc/codecs/cs-amp-lib.c
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@ -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;