Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753684AbbGWBiQ (ORCPT ); Wed, 22 Jul 2015 21:38:16 -0400 Received: from mail-oi0-f41.google.com ([209.85.218.41]:34136 "EHLO mail-oi0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753601AbbGWBiO (ORCPT ); Wed, 22 Jul 2015 21:38:14 -0400 From: Azael Avalos To: Darren Hart , platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Azael Avalos Subject: [PATCH 3/4] toshiba_acpi: Refactor *{get, set} functions return value Date: Wed, 22 Jul 2015 19:37:53 -0600 Message-Id: <1437615474-27936-8-git-send-email-coproscefalo@gmail.com> X-Mailer: git-send-email 2.4.5 In-Reply-To: <1437615474-27936-1-git-send-email-coproscefalo@gmail.com> References: <1437615474-27936-1-git-send-email-coproscefalo@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 20381 Lines: 695 This patch changes the default return value of the driver *{get, set} functions from 0 (success) to -EIO, since the driver default error value is -EIO. All the functions now check for TOS_FAILURE, TOS_NOT_SUPPORTED and TOS_SUCCESS. On TOS_FAILURE a pr_err message is printed informing the user of the error (no change was made to this, except the check was added to the functions not checking for this). On TOS_NOT_SUPPORTED we now return -ENODEV immediately (some functions were returning -EIO) On TOS_SUCCESS we now return 0, as a side effect, a new success value was added, since some functions return one instead of zero to indicate success. As a special case, the LED functions only check for TOS_FAILURE on *set with their default return value as LED_OFF, and check for TOS_FAILURE and TOS_SUCCESS on *get. Signed-off-by: Azael Avalos --- drivers/platform/x86/toshiba_acpi.c | 339 ++++++++++++++++++------------------ 1 file changed, 171 insertions(+), 168 deletions(-) diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c index 653d1fd..c099137 100644 --- a/drivers/platform/x86/toshiba_acpi.c +++ b/drivers/platform/x86/toshiba_acpi.c @@ -93,6 +93,7 @@ MODULE_LICENSE("GPL"); /* Return codes */ #define TOS_SUCCESS 0x0000 +#define TOS_SUCCESS2 0x0001 #define TOS_OPEN_CLOSE_OK 0x0044 #define TOS_FAILURE 0x1000 #define TOS_NOT_SUPPORTED 0x8000 @@ -467,7 +468,8 @@ static void toshiba_illumination_set(struct led_classdev *cdev, { struct toshiba_acpi_dev *dev = container_of(cdev, struct toshiba_acpi_dev, led_dev); - u32 state, result; + u32 result; + u32 state; /* First request : initialize communication. */ if (!sci_open(dev)) @@ -479,8 +481,6 @@ static void toshiba_illumination_set(struct led_classdev *cdev, sci_close(dev); if (result == TOS_FAILURE) pr_err("ACPI call for illumination failed\n"); - else if (result == TOS_NOT_SUPPORTED) - return; } static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev) @@ -496,14 +496,12 @@ static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev) /* Check the illumination */ result = sci_read(dev, SCI_ILLUMINATION, &state); sci_close(dev); - if (result == TOS_FAILURE || result == TOS_INPUT_DATA_ERROR) { + if (result == TOS_FAILURE) pr_err("ACPI call for illumination failed\n"); - return LED_OFF; - } else if (result == TOS_NOT_SUPPORTED) { - return LED_OFF; - } + else if (result == TOS_SUCCESS) + return state ? LED_FULL : LED_OFF; - return state ? LED_FULL : LED_OFF; + return LED_OFF; } /* KBD Illumination */ @@ -553,14 +551,14 @@ static int toshiba_kbd_illum_status_set(struct toshiba_acpi_dev *dev, u32 time) result = sci_write(dev, SCI_KBD_ILLUM_STATUS, time); sci_close(dev); - if (result == TOS_FAILURE || result == TOS_INPUT_DATA_ERROR) { + if (result == TOS_FAILURE) pr_err("ACPI call to set KBD backlight status failed\n"); - return -EIO; - } else if (result == TOS_NOT_SUPPORTED) { + else if (result == TOS_NOT_SUPPORTED) return -ENODEV; - } + else if (result == TOS_SUCCESS) + return 0; - return 0; + return -EIO; } static int toshiba_kbd_illum_status_get(struct toshiba_acpi_dev *dev, u32 *time) @@ -572,50 +570,46 @@ static int toshiba_kbd_illum_status_get(struct toshiba_acpi_dev *dev, u32 *time) result = sci_read(dev, SCI_KBD_ILLUM_STATUS, time); sci_close(dev); - if (result == TOS_FAILURE || result == TOS_INPUT_DATA_ERROR) { + if (result == TOS_FAILURE) pr_err("ACPI call to get KBD backlight status failed\n"); - return -EIO; - } else if (result == TOS_NOT_SUPPORTED) { + else if (result == TOS_NOT_SUPPORTED) return -ENODEV; - } + else if (result == TOS_SUCCESS) + return 0; - return 0; + return -EIO; } static enum led_brightness toshiba_kbd_backlight_get(struct led_classdev *cdev) { - struct toshiba_acpi_dev *dev = container_of(cdev, - struct toshiba_acpi_dev, kbd_led); - u32 state, result; + struct toshiba_acpi_dev *dev; + u32 result; + u32 state; + dev = container_of(cdev, struct toshiba_acpi_dev, kbd_led); /* Check the keyboard backlight state */ result = hci_read(dev, HCI_KBD_ILLUMINATION, &state); - if (result == TOS_FAILURE || result == TOS_INPUT_DATA_ERROR) { + if (result == TOS_FAILURE) pr_err("ACPI call to get the keyboard backlight failed\n"); - return LED_OFF; - } else if (result == TOS_NOT_SUPPORTED) { - return LED_OFF; - } + else if (result == TOS_SUCCESS) + return state ? LED_FULL : LED_OFF; - return state ? LED_FULL : LED_OFF; + return LED_OFF; } static void toshiba_kbd_backlight_set(struct led_classdev *cdev, enum led_brightness brightness) { - struct toshiba_acpi_dev *dev = container_of(cdev, - struct toshiba_acpi_dev, kbd_led); - u32 state, result; + struct toshiba_acpi_dev *dev; + u32 result; + u32 state; + dev = container_of(cdev, struct toshiba_acpi_dev, kbd_led); /* Set the keyboard backlight state */ state = brightness ? 1 : 0; result = hci_write(dev, HCI_KBD_ILLUMINATION, state); - if (result == TOS_FAILURE || result == TOS_INPUT_DATA_ERROR) { + if (result == TOS_FAILURE) pr_err("ACPI call to set KBD Illumination mode failed\n"); - return; - } else if (result == TOS_NOT_SUPPORTED) { - return; - } } /* TouchPad support */ @@ -628,14 +622,14 @@ static int toshiba_touchpad_set(struct toshiba_acpi_dev *dev, u32 state) result = sci_write(dev, SCI_TOUCHPAD, state); sci_close(dev); - if (result == TOS_FAILURE) { + if (result == TOS_FAILURE) pr_err("ACPI call to set the touchpad failed\n"); - return -EIO; - } else if (result == TOS_NOT_SUPPORTED) { + else if (result == TOS_NOT_SUPPORTED) return -ENODEV; - } + else if (result == TOS_SUCCESS) + return 0; - return 0; + return -EIO; } static int toshiba_touchpad_get(struct toshiba_acpi_dev *dev, u32 *state) @@ -647,14 +641,14 @@ static int toshiba_touchpad_get(struct toshiba_acpi_dev *dev, u32 *state) result = sci_read(dev, SCI_TOUCHPAD, state); sci_close(dev); - if (result == TOS_FAILURE) { + if (result == TOS_FAILURE) pr_err("ACPI call to query the touchpad failed\n"); - return -EIO; - } else if (result == TOS_NOT_SUPPORTED) { + else if (result == TOS_NOT_SUPPORTED) return -ENODEV; - } + else if (result == TOS_SUCCESS) + return 0; - return 0; + return -EIO; } /* Eco Mode support */ @@ -699,12 +693,12 @@ toshiba_eco_mode_get_status(struct led_classdev *cdev) acpi_status status; status = tci_raw(dev, in, out); - if (ACPI_FAILURE(status) || out[0] == TOS_INPUT_DATA_ERROR) { + if (ACPI_FAILURE(status)) pr_err("ACPI call to get ECO led failed\n"); - return LED_OFF; - } + else if (out[0] == TOS_SUCCESS) + return out[2] ? LED_FULL : LED_OFF; - return out[2] ? LED_FULL : LED_OFF; + return LED_OFF; } static void toshiba_eco_mode_set_status(struct led_classdev *cdev, @@ -719,10 +713,8 @@ static void toshiba_eco_mode_set_status(struct led_classdev *cdev, /* Switch the Eco Mode led on/off */ in[2] = (brightness) ? 1 : 0; status = tci_raw(dev, in, out); - if (ACPI_FAILURE(status) || out[0] == TOS_INPUT_DATA_ERROR) { + if (ACPI_FAILURE(status)) pr_err("ACPI call to set ECO led failed\n"); - return; - } } /* Accelerometer support */ @@ -754,15 +746,17 @@ static int toshiba_accelerometer_get(struct toshiba_acpi_dev *dev, /* Check the Accelerometer status */ status = tci_raw(dev, in, out); - if (ACPI_FAILURE(status) || out[0] == TOS_INPUT_DATA_ERROR) { + if (ACPI_FAILURE(status)) { pr_err("ACPI call to query the accelerometer failed\n"); - return -EIO; + } else if (out[0] == TOS_NOT_SUPPORTED) { + return -ENODEV; + } else if (out[0] == TOS_SUCCESS) { + *xy = out[2]; + *z = out[4]; + return 0; } - *xy = out[2]; - *z = out[4]; - - return 0; + return -EIO; } /* Sleep (Charge and Music) utilities support */ @@ -810,16 +804,14 @@ static int toshiba_usb_sleep_charge_get(struct toshiba_acpi_dev *dev, result = sci_read(dev, SCI_USB_SLEEP_CHARGE, mode); sci_close(dev); - if (result == TOS_FAILURE) { + if (result == TOS_FAILURE) pr_err("ACPI call to set USB S&C mode failed\n"); - return -EIO; - } else if (result == TOS_NOT_SUPPORTED) { + else if (result == TOS_NOT_SUPPORTED) return -ENODEV; - } else if (result == TOS_INPUT_DATA_ERROR) { - return -EIO; - } + else if (result == TOS_SUCCESS) + return 0; - return 0; + return -EIO; } static int toshiba_usb_sleep_charge_set(struct toshiba_acpi_dev *dev, @@ -832,16 +824,14 @@ static int toshiba_usb_sleep_charge_set(struct toshiba_acpi_dev *dev, result = sci_write(dev, SCI_USB_SLEEP_CHARGE, mode); sci_close(dev); - if (result == TOS_FAILURE) { + if (result == TOS_FAILURE) pr_err("ACPI call to set USB S&C mode failed\n"); - return -EIO; - } else if (result == TOS_NOT_SUPPORTED) { + else if (result == TOS_NOT_SUPPORTED) return -ENODEV; - } else if (result == TOS_INPUT_DATA_ERROR) { - return -EIO; - } + else if (result == TOS_SUCCESS) + return 0; - return 0; + return -EIO; } static int toshiba_sleep_functions_status_get(struct toshiba_acpi_dev *dev, @@ -859,16 +849,14 @@ static int toshiba_sleep_functions_status_get(struct toshiba_acpi_dev *dev, sci_close(dev); if (ACPI_FAILURE(status)) { pr_err("ACPI call to get USB S&C battery level failed\n"); - return -EIO; } else if (out[0] == TOS_NOT_SUPPORTED) { return -ENODEV; - } else if (out[0] == TOS_INPUT_DATA_ERROR) { - return -EIO; + } else if (out[0] == TOS_SUCCESS) { + *mode = out[2]; + return 0; } - *mode = out[2]; - - return 0; + return -EIO; } static int toshiba_sleep_functions_status_set(struct toshiba_acpi_dev *dev, @@ -885,16 +873,14 @@ static int toshiba_sleep_functions_status_set(struct toshiba_acpi_dev *dev, in[5] = SCI_USB_CHARGE_BAT_LVL; status = tci_raw(dev, in, out); sci_close(dev); - if (ACPI_FAILURE(status)) { + if (ACPI_FAILURE(status)) pr_err("ACPI call to set USB S&C battery level failed\n"); - return -EIO; - } else if (out[0] == TOS_NOT_SUPPORTED) { + else if (out[0] == TOS_NOT_SUPPORTED) return -ENODEV; - } else if (out[0] == TOS_INPUT_DATA_ERROR) { - return -EIO; - } + else if (out[0] == TOS_SUCCESS) + return 0; - return 0; + return -EIO; } static int toshiba_usb_rapid_charge_get(struct toshiba_acpi_dev *dev, @@ -912,15 +898,14 @@ static int toshiba_usb_rapid_charge_get(struct toshiba_acpi_dev *dev, sci_close(dev); if (ACPI_FAILURE(status)) { pr_err("ACPI call to get USB Rapid Charge failed\n"); - return -EIO; - } else if (out[0] == TOS_NOT_SUPPORTED || - out[0] == TOS_INPUT_DATA_ERROR) { + } else if (out[0] == TOS_NOT_SUPPORTED) { return -ENODEV; + } else if (out[0] == TOS_SUCCESS || out[0] == TOS_SUCCESS2) { + *state = out[2]; + return 0; } - *state = out[2]; - - return 0; + return -EIO; } static int toshiba_usb_rapid_charge_set(struct toshiba_acpi_dev *dev, @@ -937,16 +922,14 @@ static int toshiba_usb_rapid_charge_set(struct toshiba_acpi_dev *dev, in[5] = SCI_USB_CHARGE_RAPID_DSP; status = tci_raw(dev, in, out); sci_close(dev); - if (ACPI_FAILURE(status)) { + if (ACPI_FAILURE(status)) pr_err("ACPI call to set USB Rapid Charge failed\n"); - return -EIO; - } else if (out[0] == TOS_NOT_SUPPORTED) { + else if (out[0] == TOS_NOT_SUPPORTED) return -ENODEV; - } else if (out[0] == TOS_INPUT_DATA_ERROR) { - return -EIO; - } + else if (out[0] == TOS_SUCCESS || out[0] == TOS_SUCCESS2) + return 0; - return 0; + return -EIO; } static int toshiba_usb_sleep_music_get(struct toshiba_acpi_dev *dev, u32 *state) @@ -958,16 +941,14 @@ static int toshiba_usb_sleep_music_get(struct toshiba_acpi_dev *dev, u32 *state) result = sci_read(dev, SCI_USB_SLEEP_MUSIC, state); sci_close(dev); - if (result == TOS_FAILURE) { + if (result == TOS_FAILURE) pr_err("ACPI call to get Sleep and Music failed\n"); - return -EIO; - } else if (result == TOS_NOT_SUPPORTED) { + else if (result == TOS_NOT_SUPPORTED) return -ENODEV; - } else if (result == TOS_INPUT_DATA_ERROR) { - return -EIO; - } + else if (result == TOS_SUCCESS) + return 0; - return 0; + return -EIO; } static int toshiba_usb_sleep_music_set(struct toshiba_acpi_dev *dev, u32 state) @@ -979,16 +960,14 @@ static int toshiba_usb_sleep_music_set(struct toshiba_acpi_dev *dev, u32 state) result = sci_write(dev, SCI_USB_SLEEP_MUSIC, state); sci_close(dev); - if (result == TOS_FAILURE) { + if (result == TOS_FAILURE) pr_err("ACPI call to set Sleep and Music failed\n"); - return -EIO; - } else if (result == TOS_NOT_SUPPORTED) { + else if (result == TOS_NOT_SUPPORTED) return -ENODEV; - } else if (result == TOS_INPUT_DATA_ERROR) { - return -EIO; - } + else if (result == TOS_SUCCESS) + return 0; - return 0; + return -EIO; } /* Keyboard function keys */ @@ -1001,14 +980,14 @@ static int toshiba_function_keys_get(struct toshiba_acpi_dev *dev, u32 *mode) result = sci_read(dev, SCI_KBD_FUNCTION_KEYS, mode); sci_close(dev); - if (result == TOS_FAILURE || result == TOS_INPUT_DATA_ERROR) { + if (result == TOS_FAILURE) pr_err("ACPI call to get KBD function keys failed\n"); - return -EIO; - } else if (result == TOS_NOT_SUPPORTED) { + else if (result == TOS_NOT_SUPPORTED) return -ENODEV; - } + else if (result == TOS_SUCCESS || result == TOS_SUCCESS2) + return 0; - return 0; + return -EIO; } static int toshiba_function_keys_set(struct toshiba_acpi_dev *dev, u32 mode) @@ -1020,14 +999,14 @@ static int toshiba_function_keys_set(struct toshiba_acpi_dev *dev, u32 mode) result = sci_write(dev, SCI_KBD_FUNCTION_KEYS, mode); sci_close(dev); - if (result == TOS_FAILURE || result == TOS_INPUT_DATA_ERROR) { + if (result == TOS_FAILURE) pr_err("ACPI call to set KBD function keys failed\n"); - return -EIO; - } else if (result == TOS_NOT_SUPPORTED) { + else if (result == TOS_NOT_SUPPORTED) return -ENODEV; - } + else if (result == TOS_SUCCESS || result == TOS_SUCCESS2) + return 0; - return 0; + return -EIO; } /* Panel Power ON */ @@ -1040,16 +1019,14 @@ static int toshiba_panel_power_on_get(struct toshiba_acpi_dev *dev, u32 *state) result = sci_read(dev, SCI_PANEL_POWER_ON, state); sci_close(dev); - if (result == TOS_FAILURE) { + if (result == TOS_FAILURE) pr_err("ACPI call to get Panel Power ON failed\n"); - return -EIO; - } else if (result == TOS_NOT_SUPPORTED) { + else if (result == TOS_NOT_SUPPORTED) return -ENODEV; - } else if (result == TOS_INPUT_DATA_ERROR) { - return -EIO; - } + else if (result == TOS_SUCCESS) + return 0; - return 0; + return -EIO; } static int toshiba_panel_power_on_set(struct toshiba_acpi_dev *dev, u32 state) @@ -1061,16 +1038,14 @@ static int toshiba_panel_power_on_set(struct toshiba_acpi_dev *dev, u32 state) result = sci_write(dev, SCI_PANEL_POWER_ON, state); sci_close(dev); - if (result == TOS_FAILURE) { + if (result == TOS_FAILURE) pr_err("ACPI call to set Panel Power ON failed\n"); - return -EIO; - } else if (result == TOS_NOT_SUPPORTED) { + else if (result == TOS_NOT_SUPPORTED) return -ENODEV; - } else if (result == TOS_INPUT_DATA_ERROR) { - return -EIO; - } + else if (result == TOS_SUCCESS) + return 0; - return 0; + return -EIO; } /* USB Three */ @@ -1083,16 +1058,14 @@ static int toshiba_usb_three_get(struct toshiba_acpi_dev *dev, u32 *state) result = sci_read(dev, SCI_USB_THREE, state); sci_close(dev); - if (result == TOS_FAILURE) { + if (result == TOS_FAILURE) pr_err("ACPI call to get USB 3 failed\n"); - return -EIO; - } else if (result == TOS_NOT_SUPPORTED) { + else if (result == TOS_NOT_SUPPORTED) return -ENODEV; - } else if (result == TOS_INPUT_DATA_ERROR) { - return -EIO; - } + else if (result == TOS_SUCCESS || result == TOS_SUCCESS2) + return 0; - return 0; + return -EIO; } static int toshiba_usb_three_set(struct toshiba_acpi_dev *dev, u32 state) @@ -1104,16 +1077,14 @@ static int toshiba_usb_three_set(struct toshiba_acpi_dev *dev, u32 state) result = sci_write(dev, SCI_USB_THREE, state); sci_close(dev); - if (result == TOS_FAILURE) { + if (result == TOS_FAILURE) pr_err("ACPI call to set USB 3 failed\n"); - return -EIO; - } else if (result == TOS_NOT_SUPPORTED) { + else if (result == TOS_NOT_SUPPORTED) return -ENODEV; - } else if (result == TOS_INPUT_DATA_ERROR) { - return -EIO; - } + else if (result == TOS_SUCCESS || result == TOS_SUCCESS2) + return 0; - return 0; + return -EIO; } /* Hotkey Event type */ @@ -1127,29 +1098,43 @@ static int toshiba_hotkey_event_type_get(struct toshiba_acpi_dev *dev, status = tci_raw(dev, in, out); if (ACPI_FAILURE(status)) { pr_err("ACPI call to get System type failed\n"); - return -EIO; } else if (out[0] == TOS_NOT_SUPPORTED) { return -ENODEV; + } else if (out[0] == TOS_SUCCESS) { + *type = out[3]; + return 0; } - *type = out[3]; - - return 0; + return -EIO; } /* Transflective Backlight */ static int get_tr_backlight_status(struct toshiba_acpi_dev *dev, u32 *status) { - u32 hci_result = hci_read(dev, HCI_TR_BACKLIGHT, status); + u32 result = hci_read(dev, HCI_TR_BACKLIGHT, status); - return hci_result == TOS_SUCCESS ? 0 : -EIO; + if (result == TOS_FAILURE) + pr_err("ACPI call to get Transflective Backlight failed\n"); + else if (result == TOS_NOT_SUPPORTED) + return -ENODEV; + else if (result == TOS_SUCCESS) + return 0; + + return -EIO; } static int set_tr_backlight_status(struct toshiba_acpi_dev *dev, u32 status) { - u32 hci_result = hci_write(dev, HCI_TR_BACKLIGHT, !status); + u32 result = hci_write(dev, HCI_TR_BACKLIGHT, !status); - return hci_result == TOS_SUCCESS ? 0 : -EIO; + if (result == TOS_FAILURE) + pr_err("ACPI call to set Transflective Backlight failed\n"); + else if (result == TOS_NOT_SUPPORTED) + return -ENODEV; + else if (result == TOS_SUCCESS) + return 0; + + return -EIO; } static struct proc_dir_entry *toshiba_proc_dir; @@ -1157,7 +1142,7 @@ static struct proc_dir_entry *toshiba_proc_dir; /* LCD Brightness */ static int __get_lcd_brightness(struct toshiba_acpi_dev *dev) { - u32 hci_result; + u32 result; u32 value; int brightness = 0; @@ -1171,8 +1156,12 @@ static int __get_lcd_brightness(struct toshiba_acpi_dev *dev) brightness++; } - hci_result = hci_read(dev, HCI_LCD_BRIGHTNESS, &value); - if (hci_result == TOS_SUCCESS) + result = hci_read(dev, HCI_LCD_BRIGHTNESS, &value); + if (result == TOS_FAILURE) + pr_err("ACPI call to get LCD Brightness failed\n"); + else if (result == TOS_NOT_SUPPORTED) + return -ENODEV; + else if (result == TOS_SUCCESS) return brightness + (value >> HCI_LCD_BRIGHTNESS_SHIFT); return -EIO; @@ -1213,7 +1202,7 @@ static int lcd_proc_open(struct inode *inode, struct file *file) static int set_lcd_brightness(struct toshiba_acpi_dev *dev, int value) { - u32 hci_result; + u32 result; if (dev->tr_backlight_supported) { int ret = set_tr_backlight_status(dev, !value); @@ -1225,8 +1214,15 @@ static int set_lcd_brightness(struct toshiba_acpi_dev *dev, int value) } value = value << HCI_LCD_BRIGHTNESS_SHIFT; - hci_result = hci_write(dev, HCI_LCD_BRIGHTNESS, value); - return hci_result == TOS_SUCCESS ? 0 : -EIO; + result = hci_write(dev, HCI_LCD_BRIGHTNESS, value); + if (result == TOS_FAILURE) + pr_err("ACPI call to set LCD Brightness failed\n"); + else if (result == TOS_NOT_SUPPORTED) + return -ENODEV; + else if (result == TOS_SUCCESS) + return 0; + + return -EIO; } static int set_lcd_status(struct backlight_device *bd) @@ -1271,12 +1267,19 @@ static const struct file_operations lcd_proc_fops = { .write = lcd_proc_write, }; +/* Video-Out */ static int get_video_status(struct toshiba_acpi_dev *dev, u32 *status) { - u32 hci_result; + u32 result = hci_read(dev, HCI_VIDEO_OUT, status); - hci_result = hci_read(dev, HCI_VIDEO_OUT, status); - return hci_result == TOS_SUCCESS ? 0 : -EIO; + if (result == TOS_FAILURE) + pr_err("ACPI call to get Video-Out failed\n"); + else if (result == TOS_NOT_SUPPORTED) + return -ENODEV; + else if (result == TOS_SUCCESS) + return 0; + + return -EIO; } static int video_proc_show(struct seq_file *m, void *v) -- 2.4.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/