diff options
| author | mb <mb@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2011-11-16 22:34:38 +0000 |
|---|---|---|
| committer | mb <mb@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2011-11-16 22:34:38 +0000 |
| commit | 53a62e28c0d976c13d7ba9e2db87178f13a662a0 (patch) | |
| tree | 4f4cd09757d0ed730d3cdde6ba1d9cff4491ca10 | |
| parent | b520c4d48edd93c125bc8931ad4118ecf885bee3 (diff) | |
omap24xx: Add workaround for omapfb locking bug.
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29201 3c298f89-4303-0410-b956-a3cf2f4a3e73
| -rw-r--r-- | target/linux/omap24xx/patches-3.1/309-omapfb-circular-mutex-workaround.patch | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/target/linux/omap24xx/patches-3.1/309-omapfb-circular-mutex-workaround.patch b/target/linux/omap24xx/patches-3.1/309-omapfb-circular-mutex-workaround.patch new file mode 100644 index 000000000..161698ddd --- /dev/null +++ b/target/linux/omap24xx/patches-3.1/309-omapfb-circular-mutex-workaround.patch @@ -0,0 +1,45 @@ +Index: linux-3.1.1/drivers/video/omap/omapfb_main.c +=================================================================== +--- linux-3.1.1.orig/drivers/video/omap/omapfb_main.c 2011-11-11 21:19:27.000000000 +0100 ++++ linux-3.1.1/drivers/video/omap/omapfb_main.c 2011-11-16 23:10:16.554325659 +0100 +@@ -419,10 +419,10 @@ static void set_fb_fix(struct fb_info *f + fbi->screen_base = rg->vaddr; + + if (!from_init) { +- mutex_lock(&fbi->mm_lock); ++ preempt_disable(); + fix->smem_start = rg->paddr; + fix->smem_len = rg->size; +- mutex_unlock(&fbi->mm_lock); ++ preempt_enable(); + } else { + fix->smem_start = rg->paddr; + fix->smem_len = rg->size; +@@ -932,10 +932,10 @@ static int omapfb_setup_mem(struct fb_in + * plane memory is dealloce'd, the other + * screen parameters in var / fix are invalid. + */ +- mutex_lock(&fbi->mm_lock); ++ preempt_disable(); + fbi->fix.smem_start = 0; + fbi->fix.smem_len = 0; +- mutex_unlock(&fbi->mm_lock); ++ preempt_enable(); + } + } + } +Index: linux-3.1.1/drivers/video/fbmem.c +=================================================================== +--- linux-3.1.1.orig/drivers/video/fbmem.c 2011-11-11 21:19:27.000000000 +0100 ++++ linux-3.1.1/drivers/video/fbmem.c 2011-11-16 23:20:56.055698968 +0100 +@@ -1369,8 +1369,10 @@ fb_mmap(struct file *file, struct vm_are + } + + /* frame buffer memory */ ++ preempt_disable(); + start = info->fix.smem_start; + len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); ++ preempt_enable(); + if (off >= len) { + /* memory mapped io */ + off -= len; |