From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754241Ab3LNRbd (ORCPT ); Sat, 14 Dec 2013 12:31:33 -0500 Received: from mail-pd0-f172.google.com ([209.85.192.172]:39125 "EHLO mail-pd0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753944Ab3LNRaw (ORCPT ); Sat, 14 Dec 2013 12:30:52 -0500 From: Guenter Roeck To: Arnd Bergmann , Greg Kroah-Hartman Cc: Andrew Morton , lm-sensors@lm-sensors.org, linux-kernel@vger.kernel.org, Guenter Roeck Subject: [PATCH 13/14] i8k: Stop reading SMM BIOS version during driver probe Date: Sat, 14 Dec 2013 09:30:20 -0800 Message-Id: <1387042221-3671-14-git-send-email-linux@roeck-us.net> X-Mailer: git-send-email 1.7.9.7 In-Reply-To: <1387042221-3671-1-git-send-email-linux@roeck-us.net> References: <1387042221-3671-1-git-send-email-linux@roeck-us.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This doesn't work on Studio, XPS, Vostro, and Precision laptops, and it doesn't provide any value except to cause confusion when it does not work. Drop it and always use DMI BIOS version instead. Signed-off-by: Guenter Roeck --- drivers/char/i8k.c | 42 ++---------------------------------------- 1 file changed, 2 insertions(+), 40 deletions(-) diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c index 67e4256..ce826d9 100644 --- a/drivers/char/i8k.c +++ b/drivers/char/i8k.c @@ -44,7 +44,6 @@ #define I8K_SMM_GET_TEMP 0x10a3 #define I8K_SMM_GET_DELL_SIG1 0xfea3 #define I8K_SMM_GET_DELL_SIG2 0xffa3 -#define I8K_SMM_BIOS_VERSION 0x00a6 #define I8K_FAN_MULT 30 #define I8K_MAX_TEMP 127 @@ -208,17 +207,6 @@ out: } /* - * Read the bios version. Return the version as an integer corresponding - * to the ascii value, for example "A17" is returned as 0x00413137. - */ -static int i8k_get_bios_version(void) -{ - struct smm_regs regs = { .eax = I8K_SMM_BIOS_VERSION, }; - - return i8k_smm(®s) ? : regs.eax; -} - -/* * Read the Fn key status. */ static int i8k_get_fn_status(void) @@ -355,7 +343,8 @@ i8k_ioctl_unlocked(struct file *fp, unsigned int cmd, unsigned long arg) switch (cmd) { case I8K_BIOS_VERSION: - val = i8k_get_bios_version(); + val = (bios_version[0] << 16) | + (bios_version[1] << 8) | bios_version[2]; break; case I8K_MACHINE_ID: @@ -710,8 +699,6 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = { */ static int __init i8k_probe(void) { - char buff[4]; - int version; const struct dmi_system_id *id; /* @@ -741,31 +728,6 @@ static int __init i8k_probe(void) return -ENODEV; } - /* - * Get SMM BIOS version. - */ - version = i8k_get_bios_version(); - if (version <= 0) { - pr_warn("unable to get SMM BIOS version\n"); - } else { - buff[0] = (version >> 16) & 0xff; - buff[1] = (version >> 8) & 0xff; - buff[2] = (version) & 0xff; - buff[3] = '\0'; - /* - * If DMI BIOS version is unknown use SMM BIOS version. - */ - if (!dmi_get_system_info(DMI_BIOS_VERSION)) - strlcpy(bios_version, buff, sizeof(bios_version)); - - /* - * Check if the two versions match. - */ - if (strncmp(buff, bios_version, sizeof(bios_version)) != 0) - pr_warn("BIOS version mismatch: %s != %s\n", - buff, bios_version); - } - i8k_fan_mult = fan_mult; id = dmi_first_match(i8k_dmi_table); if (id && fan_mult == I8K_FAN_MULT && id->driver_data) -- 1.7.9.7