diff options
Diffstat (limited to 'target/linux/omap24xx/patches-3.3/309-omapfb-circular-mutex-workaround.patch')
| -rw-r--r-- | target/linux/omap24xx/patches-3.3/309-omapfb-circular-mutex-workaround.patch | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/target/linux/omap24xx/patches-3.3/309-omapfb-circular-mutex-workaround.patch b/target/linux/omap24xx/patches-3.3/309-omapfb-circular-mutex-workaround.patch new file mode 100644 index 000000000..e5e083e24 --- /dev/null +++ b/target/linux/omap24xx/patches-3.3/309-omapfb-circular-mutex-workaround.patch @@ -0,0 +1,41 @@ +--- a/drivers/video/omap/omapfb_main.c ++++ b/drivers/video/omap/omapfb_main.c +@@ -420,10 +420,10 @@ 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; +@@ -933,10 +933,10 @@ 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(); + } + } + } +--- a/drivers/video/fbmem.c ++++ b/drivers/video/fbmem.c +@@ -1383,8 +1383,10 @@ 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; |