linux-kernel - [PATCH] ACPICA: Check whether ACPI is disabled before getting a table

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Message-ID: <20170821132054.mwhdxkcka4ocp6h5@pd.tnic>
Date:   Mon, 21 Aug 2017 15:20:54 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Toshi Kani <toshi.kani@....com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Tony Luck <tony.luck@...el.com>, Len Brown <lenb@...nel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        "open list:EDAC-CORE" <linux-edac@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] ACPICA: Check whether ACPI is disabled before getting a table

Borislav Petkov <bp@...e.de>

... and save us the splrinking of this test around in the callers.

No functionality change.

Signed-off-by: Borislav Petkov <bp@...e.de>
---
 drivers/acpi/acpica/tbxface.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/acpi/acpica/tbxface.c b/drivers/acpi/acpica/tbxface.c
index 010b1c43df92..881b0d5b2838 100644
--- a/drivers/acpi/acpica/tbxface.c
+++ b/drivers/acpi/acpica/tbxface.c
@@ -226,6 +226,9 @@ acpi_get_table_header(char *signature,
 	u32 j;
 	struct acpi_table_header *header;
 
+	if (acpi_disabled)
+		return (AE_ERROR);
+
 	/* Parameter validation */
 
 	if (!signature || !out_table_header) {
-- 
2.13.0

-- 
Regards/Gruss,
    Boris.

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