| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1438401496-27744-4-git-send-email-coproscefalo@gmail.com>
Date: Fri, 31 Jul 2015 21:58:14 -0600
From: Azael Avalos <coproscefalo@...il.com>
To: Darren Hart <dvhart@...radead.org>,
platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Azael Avalos <coproscefalo@...il.com>
Subject: [PATCH v3 3/5] toshiba_acpi: Refactor *{get, set} functions return value
This patch refactors the return value of the driver *{get, set}
functions, 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 and some other were not checking)
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 now check for *FAILURE on
*set, and check for TOS_FAILURE and TOS_SUCCESS on *get with their
"default" return value set to LED_OFF.
Also the {lcd, video}_proc* functions were adapted to reflect these
changes to their parent HCI functions.
Signed-off-by: Azael Avalos <coproscefalo@...il.com>
---
drivers/platform/x86/toshiba_acpi.c | 177 +++++++++++++++++++++---------------
1 file changed, 104 insertions(+), 73 deletions(-)
diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
index 66b596a..7b16d8d 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
@@ -469,7 +470,8 @@ 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))
@@ -503,7 +505,7 @@ static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev)
if (result == TOS_FAILURE || result == TOS_INPUT_DATA_ERROR) {
pr_err("ACPI call for illumination failed\n");
return LED_OFF;
- } else if (result == TOS_NOT_SUPPORTED) {
+ } else if (result != TOS_SUCCESS) {
return LED_OFF;
}
@@ -565,7 +567,7 @@ static int toshiba_kbd_illum_status_set(struct toshiba_acpi_dev *dev, u32 time)
return -ENODEV;
}
- return 0;
+ return result == TOS_SUCCESS ? 0 : -EIO;
}
static int toshiba_kbd_illum_status_get(struct toshiba_acpi_dev *dev, u32 *time)
@@ -584,21 +586,22 @@ static int toshiba_kbd_illum_status_get(struct toshiba_acpi_dev *dev, u32 *time)
return -ENODEV;
}
- return 0;
+ return result == TOS_SUCCESS ? 0 : -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;
+ u32 result;
+ u32 state;
/* Check the keyboard backlight state */
result = hci_read(dev, HCI_KBD_ILLUMINATION, &state);
if (result == TOS_FAILURE || result == TOS_INPUT_DATA_ERROR) {
pr_err("ACPI call to get the keyboard backlight failed\n");
return LED_OFF;
- } else if (result == TOS_NOT_SUPPORTED) {
+ } else if (result != TOS_SUCCESS) {
return LED_OFF;
}
@@ -610,7 +613,8 @@ static void toshiba_kbd_backlight_set(struct led_classdev *cdev,
{
struct toshiba_acpi_dev *dev = container_of(cdev,
struct toshiba_acpi_dev, kbd_led);
- u32 state, result;
+ u32 result;
+ u32 state;
/* Set the keyboard backlight state */
state = brightness ? 1 : 0;
@@ -640,7 +644,7 @@ static int toshiba_touchpad_set(struct toshiba_acpi_dev *dev, u32 state)
return -ENODEV;
}
- return 0;
+ return result == TOS_SUCCESS ? 0 : -EIO;
}
static int toshiba_touchpad_get(struct toshiba_acpi_dev *dev, u32 *state)
@@ -659,7 +663,7 @@ static int toshiba_touchpad_get(struct toshiba_acpi_dev *dev, u32 *state)
return -ENODEV;
}
- return 0;
+ return result == TOS_SUCCESS ? 0 : -EIO;
}
/* Eco Mode support */
@@ -709,6 +713,8 @@ toshiba_eco_mode_get_status(struct led_classdev *cdev)
if (ACPI_FAILURE(status) || out[0] == TOS_INPUT_DATA_ERROR) {
pr_err("ACPI call to get ECO led failed\n");
return LED_OFF;
+ } else if (out[0] != TOS_SUCCESS) {
+ return LED_OFF;
}
return out[2] ? LED_FULL : LED_OFF;
@@ -769,12 +775,15 @@ static int toshiba_accelerometer_get(struct toshiba_acpi_dev *dev,
if (ACPI_FAILURE(status) || out[0] == TOS_INPUT_DATA_ERROR) {
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 */
@@ -835,7 +844,7 @@ static int toshiba_usb_sleep_charge_get(struct toshiba_acpi_dev *dev,
return -EIO;
}
- return 0;
+ return result == TOS_SUCCESS ? 0 : -EIO;
}
static int toshiba_usb_sleep_charge_set(struct toshiba_acpi_dev *dev,
@@ -857,7 +866,7 @@ static int toshiba_usb_sleep_charge_set(struct toshiba_acpi_dev *dev,
return -EIO;
}
- return 0;
+ return result == TOS_SUCCESS ? 0 : -EIO;
}
static int toshiba_sleep_functions_status_get(struct toshiba_acpi_dev *dev,
@@ -880,11 +889,12 @@ static int toshiba_sleep_functions_status_get(struct toshiba_acpi_dev *dev,
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,
@@ -910,7 +920,7 @@ static int toshiba_sleep_functions_status_set(struct toshiba_acpi_dev *dev,
return -EIO;
}
- return 0;
+ return out[0] == TOS_SUCCESS ? 0 : -EIO;
}
static int toshiba_usb_rapid_charge_get(struct toshiba_acpi_dev *dev,
@@ -932,11 +942,12 @@ static int toshiba_usb_rapid_charge_get(struct toshiba_acpi_dev *dev,
} else if (out[0] == TOS_NOT_SUPPORTED ||
out[0] == TOS_INPUT_DATA_ERROR) {
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,
@@ -962,7 +973,7 @@ static int toshiba_usb_rapid_charge_set(struct toshiba_acpi_dev *dev,
return -EIO;
}
- return 0;
+ return (out[0] == TOS_SUCCESS || out[0] == TOS_SUCCESS2) ? 0 : -EIO;
}
static int toshiba_usb_sleep_music_get(struct toshiba_acpi_dev *dev, u32 *state)
@@ -983,7 +994,7 @@ static int toshiba_usb_sleep_music_get(struct toshiba_acpi_dev *dev, u32 *state)
return -EIO;
}
- return 0;
+ return result = TOS_SUCCESS ? 0 : -EIO;
}
static int toshiba_usb_sleep_music_set(struct toshiba_acpi_dev *dev, u32 state)
@@ -1004,7 +1015,7 @@ static int toshiba_usb_sleep_music_set(struct toshiba_acpi_dev *dev, u32 state)
return -EIO;
}
- return 0;
+ return result == TOS_SUCCESS ? 0 : -EIO;
}
/* Keyboard function keys */
@@ -1024,7 +1035,7 @@ static int toshiba_function_keys_get(struct toshiba_acpi_dev *dev, u32 *mode)
return -ENODEV;
}
- return 0;
+ return (result == TOS_SUCCESS || result == TOS_SUCCESS2) ? 0 : -EIO;
}
static int toshiba_function_keys_set(struct toshiba_acpi_dev *dev, u32 mode)
@@ -1043,7 +1054,7 @@ static int toshiba_function_keys_set(struct toshiba_acpi_dev *dev, u32 mode)
return -ENODEV;
}
- return 0;
+ return (result == TOS_SUCCESS || result == TOS_SUCCESS2) ? 0 : -EIO;
}
/* Panel Power ON */
@@ -1065,7 +1076,7 @@ static int toshiba_panel_power_on_get(struct toshiba_acpi_dev *dev, u32 *state)
return -EIO;
}
- return 0;
+ return result == TOS_SUCCESS ? 0 : -EIO;
}
static int toshiba_panel_power_on_set(struct toshiba_acpi_dev *dev, u32 state)
@@ -1086,7 +1097,7 @@ static int toshiba_panel_power_on_set(struct toshiba_acpi_dev *dev, u32 state)
return -EIO;
}
- return 0;
+ return result == TOS_SUCCESS ? 0 : -EIO;
}
/* USB Three */
@@ -1108,7 +1119,7 @@ static int toshiba_usb_three_get(struct toshiba_acpi_dev *dev, u32 *state)
return -EIO;
}
- return 0;
+ return (result == TOS_SUCCESS || result == TOS_SUCCESS2) ? 0 : -EIO;
}
static int toshiba_usb_three_set(struct toshiba_acpi_dev *dev, u32 state)
@@ -1129,7 +1140,7 @@ static int toshiba_usb_three_set(struct toshiba_acpi_dev *dev, u32 state)
return -EIO;
}
- return 0;
+ return (result == TOS_SUCCESS || result == TOS_SUCCESS2) ? 0 : -EIO;
}
/* Hotkey Event type */
@@ -1146,26 +1157,37 @@ static int toshiba_hotkey_event_type_get(struct toshiba_acpi_dev *dev,
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);
+
+ if (result == TOS_FAILURE)
+ pr_err("ACPI call to get Transflective Backlight failed\n");
+ else if (result == TOS_NOT_SUPPORTED)
+ return -ENODEV;
- return hci_result == TOS_SUCCESS ? 0 : -EIO;
+ return result == TOS_SUCCESS ? 0 : -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);
+
+ if (result == TOS_FAILURE)
+ pr_err("ACPI call to set Transflective Backlight failed\n");
+ else if (result == TOS_NOT_SUPPORTED)
+ return -ENODEV;
- return hci_result == TOS_SUCCESS ? 0 : -EIO;
+ return result == TOS_SUCCESS ? 0 : -EIO;
}
static struct proc_dir_entry *toshiba_proc_dir;
@@ -1173,7 +1195,7 @@ 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;
@@ -1187,8 +1209,12 @@ 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;
+ if (result == TOS_SUCCESS)
return brightness + (value >> HCI_LCD_BRIGHTNESS_SHIFT);
return -EIO;
@@ -1204,8 +1230,8 @@ static int get_lcd_brightness(struct backlight_device *bd)
static int lcd_proc_show(struct seq_file *m, void *v)
{
struct toshiba_acpi_dev *dev = m->private;
- int value;
int levels;
+ int value;
if (!dev->backlight_dev)
return -ENODEV;
@@ -1219,6 +1245,7 @@ static int lcd_proc_show(struct seq_file *m, void *v)
}
pr_err("Error reading LCD brightness\n");
+
return -EIO;
}
@@ -1229,7 +1256,7 @@ 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);
@@ -1241,8 +1268,13 @@ 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;
+
+ return result == TOS_SUCCESS ? 0 : -EIO;
}
static int set_lcd_status(struct backlight_device *bd)
@@ -1258,24 +1290,22 @@ static ssize_t lcd_proc_write(struct file *file, const char __user *buf,
struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
char cmd[42];
size_t len;
- int value;
- int ret;
int levels = dev->backlight_dev->props.max_brightness + 1;
+ int value;
len = min(count, sizeof(cmd) - 1);
if (copy_from_user(cmd, buf, len))
return -EFAULT;
cmd[len] = '\0';
- if (sscanf(cmd, " brightness : %i", &value) == 1 &&
- value >= 0 && value < levels) {
- ret = set_lcd_brightness(dev, value);
- if (ret == 0)
- ret = count;
- } else {
- ret = -EINVAL;
- }
- return ret;
+ if (sscanf(cmd, " brightness : %i", &value) != 1 &&
+ value < 0 && value > levels)
+ return -EINVAL;
+
+ if (set_lcd_brightness(dev, value))
+ return -EIO;
+
+ return count;
}
static const struct file_operations lcd_proc_fops = {
@@ -1287,22 +1317,25 @@ 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);
+
+ if (result == TOS_FAILURE)
+ pr_err("ACPI call to get Video-Out failed\n");
+ else if (result == TOS_NOT_SUPPORTED)
+ return -ENODEV;
- hci_result = hci_read(dev, HCI_VIDEO_OUT, status);
- return hci_result == TOS_SUCCESS ? 0 : -EIO;
+ return result == TOS_SUCCESS ? 0 : -EIO;
}
static int video_proc_show(struct seq_file *m, void *v)
{
struct toshiba_acpi_dev *dev = m->private;
u32 value;
- int ret;
- ret = get_video_status(dev, &value);
- if (!ret) {
+ if (!get_video_status(dev, &value)) {
int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;
@@ -1310,9 +1343,10 @@ static int video_proc_show(struct seq_file *m, void *v)
seq_printf(m, "lcd_out: %d\n", is_lcd);
seq_printf(m, "crt_out: %d\n", is_crt);
seq_printf(m, "tv_out: %d\n", is_tv);
+ return 0;
}
- return ret;
+ return -EIO;
}
static int video_proc_open(struct inode *inode, struct file *file)
@@ -1324,13 +1358,14 @@ static ssize_t video_proc_write(struct file *file, const char __user *buf,
size_t count, loff_t *pos)
{
struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
- char *cmd, *buffer;
- int ret;
- int value;
+ char *buffer;
+ char *cmd;
int remain = count;
int lcd_out = -1;
int crt_out = -1;
int tv_out = -1;
+ int value;
+ int ret;
u32 video_out;
cmd = kmalloc(count + 1, GFP_KERNEL);
@@ -1382,7 +1417,7 @@ static ssize_t video_proc_write(struct file *file, const char __user *buf,
ret = write_acpi_int(METHOD_VIDEO_OUT, new_video_out);
}
- return ret ? ret : count;
+ return ret ? -EIO : count;
}
static const struct file_operations video_proc_fops = {
@@ -1403,10 +1438,8 @@ static int get_fan_status(struct toshiba_acpi_dev *dev, u32 *status)
pr_err("ACPI call to get Fan status failed\n");
else if (result == TOS_NOT_SUPPORTED)
return -ENODEV;
- else if (result == TOS_SUCCESS)
- return 0;
- return -EIO;
+ return result == TOS_SUCCESS ? 0 : -EIO;
}
static int set_fan_status(struct toshiba_acpi_dev *dev, u32 status)
@@ -1417,10 +1450,8 @@ static int set_fan_status(struct toshiba_acpi_dev *dev, u32 status)
pr_err("ACPI call to set Fan status failed\n");
else if (result == TOS_NOT_SUPPORTED)
return -ENODEV;
- else if (result == TOS_SUCCESS)
- return 0;
- return -EIO;
+ return result == TOS_SUCCESS ? 0 : -EIO;
}
static int fan_proc_show(struct seq_file *m, void *v)
--
2.4.6
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists