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

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[ Upstream commit dc268085e4 ]

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: 1cad8725f2 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Richard Fitzgerald
2024-08-05 12:42:22 +01:00
committed by Greg Kroah-Hartman
parent 0fcc4a5b5b
commit 5b6baaa7cb
1 changed files with 1 additions and 1 deletions
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sound/soc/codecs/cs-amp-lib.c
+1 -1
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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;