diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/rtc.c | 5 | ||||
| -rw-r--r-- | drivers/media/video/videodev.c | 2 | ||||
| -rw-r--r-- | drivers/video/fbsysfs.c | 12 |
3 files changed, 16 insertions, 3 deletions
diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c index 6e6a7c7a7ef..ab6429b4a84 100644 --- a/drivers/char/rtc.c +++ b/drivers/char/rtc.c @@ -209,11 +209,12 @@ static const unsigned char days_in_mo[] = */ static inline unsigned char rtc_is_updating(void) { + unsigned long flags; unsigned char uip; - spin_lock_irq(&rtc_lock); + spin_lock_irqsave(&rtc_lock, flags); uip = (CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP); - spin_unlock_irq(&rtc_lock); + spin_unlock_irqrestore(&rtc_lock, flags); return uip; } diff --git a/drivers/media/video/videodev.c b/drivers/media/video/videodev.c index 88bf2af2a0e..edd7b83c346 100644 --- a/drivers/media/video/videodev.c +++ b/drivers/media/video/videodev.c @@ -836,7 +836,7 @@ static int __video_do_ioctl(struct inode *inode, struct file *file, break; } - if (index<=0 || index >= vfd->tvnormsize) { + if (index < 0 || index >= vfd->tvnormsize) { ret=-EINVAL; break; } diff --git a/drivers/video/fbsysfs.c b/drivers/video/fbsysfs.c index 4f78f234473..c151dcf6878 100644 --- a/drivers/video/fbsysfs.c +++ b/drivers/video/fbsysfs.c @@ -397,6 +397,12 @@ static ssize_t store_bl_curve(struct class_device *class_device, u8 tmp_curve[FB_BACKLIGHT_LEVELS]; unsigned int i; + /* Some drivers don't use framebuffer_alloc(), but those also + * don't have backlights. + */ + if (!fb_info || !fb_info->bl_dev) + return -ENODEV; + if (count != (FB_BACKLIGHT_LEVELS / 8 * 24)) return -EINVAL; @@ -430,6 +436,12 @@ static ssize_t show_bl_curve(struct class_device *class_device, char *buf) ssize_t len = 0; unsigned int i; + /* Some drivers don't use framebuffer_alloc(), but those also + * don't have backlights. + */ + if (!fb_info || !fb_info->bl_dev) + return -ENODEV; + mutex_lock(&fb_info->bl_mutex); for (i = 0; i < FB_BACKLIGHT_LEVELS; i += 8) len += snprintf(&buf[len], PAGE_SIZE, |