From: Richard Fitzgerald <rf@opensource.cirrus.com>
To: <broonie@kernel.org>
Cc: <linux-sound@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<patches@opensource.cirrus.com>,
Richard Fitzgerald <rf@opensource.cirrus.com>
Subject: [PATCH] ASoC: cs-amp-lib: Fix NULL pointer crash if efi.get_variable is NULL
Date: Mon, 5 Aug 2024 12:42:22 +0100 [thread overview]
Message-ID: <20240805114222.15722-1-rf@opensource.cirrus.com> (raw)
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")
---
sound/soc/codecs/cs-amp-lib.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/soc/codecs/cs-amp-lib.c b/sound/soc/codecs/cs-amp-lib.c
index 287ac01a3873..605964af8afa 100644
--- 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;
--
2.39.2
next reply other threads:[~2024-08-05 11:42 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-05 11:42 Richard Fitzgerald [this message]
2024-08-05 17:26 ` [PATCH] ASoC: cs-amp-lib: Fix NULL pointer crash if efi.get_variable is NULL Mark Brown
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