From 238a41329ca208d1170962260babb428b6e222c2 Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Thu, 18 Mar 2010 10:32:05 +0100 Subject: OMAP: DSS2: fix lock_fb_info() and omapfb_lock() locking order Framebuffer ioctl processing forces lock_fb_info() -> omapfb_lock() locking order. Follow that order to avoid possible circular locking dependency, detected by lockdep. Signed-off-by: Jani Nikula Signed-off-by: Tomi Valkeinen --- drivers/video/omap2/omapfb/omapfb-ioctl.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/video/omap2/omapfb/omapfb-ioctl.c') diff --git a/drivers/video/omap2/omapfb/omapfb-ioctl.c b/drivers/video/omap2/omapfb/omapfb-ioctl.c index 1ffa760b8545..2c0f01c44aab 100644 --- a/drivers/video/omap2/omapfb/omapfb-ioctl.c +++ b/drivers/video/omap2/omapfb/omapfb-ioctl.c @@ -183,13 +183,13 @@ int omapfb_update_window(struct fb_info *fbi, struct omapfb2_device *fbdev = ofbi->fbdev; int r; - omapfb_lock(fbdev); lock_fb_info(fbi); + omapfb_lock(fbdev); r = omapfb_update_window_nolock(fbi, x, y, w, h); - unlock_fb_info(fbi); omapfb_unlock(fbdev); + unlock_fb_info(fbi); return r; } -- cgit v1.2.3 From 27b67c92a30967e3a9e9ea082d4ca4bc6882f879 Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Thu, 18 Mar 2010 10:32:06 +0100 Subject: OMAP: DSS2: check lock_fb_info() return value Give up if lock_fb_info() fails, following the same convention as other lock_fb_info() users. Signed-off-by: Jani Nikula Signed-off-by: Tomi Valkeinen --- drivers/video/omap2/omapfb/omapfb-ioctl.c | 3 ++- drivers/video/omap2/omapfb/omapfb-sysfs.c | 21 ++++++++++++++------- 2 files changed, 16 insertions(+), 8 deletions(-) (limited to 'drivers/video/omap2/omapfb/omapfb-ioctl.c') diff --git a/drivers/video/omap2/omapfb/omapfb-ioctl.c b/drivers/video/omap2/omapfb/omapfb-ioctl.c index 2c0f01c44aab..9c7361871d78 100644 --- a/drivers/video/omap2/omapfb/omapfb-ioctl.c +++ b/drivers/video/omap2/omapfb/omapfb-ioctl.c @@ -183,7 +183,8 @@ int omapfb_update_window(struct fb_info *fbi, struct omapfb2_device *fbdev = ofbi->fbdev; int r; - lock_fb_info(fbi); + if (!lock_fb_info(fbi)) + return -ENODEV; omapfb_lock(fbdev); r = omapfb_update_window_nolock(fbi, x, y, w, h); diff --git a/drivers/video/omap2/omapfb/omapfb-sysfs.c b/drivers/video/omap2/omapfb/omapfb-sysfs.c index e10445017985..5179219128bd 100644 --- a/drivers/video/omap2/omapfb/omapfb-sysfs.c +++ b/drivers/video/omap2/omapfb/omapfb-sysfs.c @@ -57,7 +57,8 @@ static ssize_t store_rotate_type(struct device *dev, if (rot_type != OMAP_DSS_ROT_DMA && rot_type != OMAP_DSS_ROT_VRFB) return -EINVAL; - lock_fb_info(fbi); + if (!lock_fb_info(fbi)) + return -ENODEV; r = 0; if (rot_type == ofbi->rotation_type) @@ -105,7 +106,8 @@ static ssize_t store_mirror(struct device *dev, if (mirror != 0 && mirror != 1) return -EINVAL; - lock_fb_info(fbi); + if (!lock_fb_info(fbi)) + return -ENODEV; ofbi->mirror = mirror; @@ -137,7 +139,8 @@ static ssize_t show_overlays(struct device *dev, ssize_t l = 0; int t; - lock_fb_info(fbi); + if (!lock_fb_info(fbi)) + return -ENODEV; omapfb_lock(fbdev); for (t = 0; t < ofbi->num_overlays; t++) { @@ -195,7 +198,8 @@ static ssize_t store_overlays(struct device *dev, struct device_attribute *attr, if (buf[len - 1] == '\n') len = len - 1; - lock_fb_info(fbi); + if (!lock_fb_info(fbi)) + return -ENODEV; omapfb_lock(fbdev); if (len > 0) { @@ -317,7 +321,8 @@ static ssize_t show_overlays_rotate(struct device *dev, ssize_t l = 0; int t; - lock_fb_info(fbi); + if (!lock_fb_info(fbi)) + return -ENODEV; for (t = 0; t < ofbi->num_overlays; t++) { l += snprintf(buf + l, PAGE_SIZE - l, "%s%d", @@ -345,7 +350,8 @@ static ssize_t store_overlays_rotate(struct device *dev, if (buf[len - 1] == '\n') len = len - 1; - lock_fb_info(fbi); + if (!lock_fb_info(fbi)) + return -ENODEV; if (len > 0) { char *p = (char *)buf; @@ -416,7 +422,8 @@ static ssize_t store_size(struct device *dev, struct device_attribute *attr, size = PAGE_ALIGN(simple_strtoul(buf, NULL, 0)); - lock_fb_info(fbi); + if (!lock_fb_info(fbi)) + return -ENODEV; for (i = 0; i < ofbi->num_overlays; i++) { if (ofbi->overlays[i]->info.enabled) { -- cgit v1.2.3