Use uninterruptible mutex_lock in the release() file op to make sure all resources are properly freed when a process is being terminated. Returning -ERESTARTSYS has no effect for a terminating process and this caused driver resources not to be released. Not releasing the buffer queue also prevented other drivers to free memory, e.g. in MMAP -> USERPTR scenario.
This patch is required for stable kernels v3.6+. Cc: [email protected] Reported-by: Kamil Debski <[email protected]> Reported-by: Marek Szyprowski <[email protected]> Signed-off-by: Sylwester Nawrocki <[email protected]> Signed-off-by: Kyungmin Park <[email protected]> --- Changes since v1: - previous patch split in t make it applicable to relevant stable kernels drivers/media/platform/s5p-fimc/fimc-capture.c | 3 +-- drivers/media/platform/s5p-fimc/fimc-m2m.c | 3 +-- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/media/platform/s5p-fimc/fimc-capture.c b/drivers/media/platform/s5p-fimc/fimc-capture.c index 3fc896b..891ee87 100644 --- a/drivers/media/platform/s5p-fimc/fimc-capture.c +++ b/drivers/media/platform/s5p-fimc/fimc-capture.c @@ -556,8 +556,7 @@ static int fimc_capture_close(struct file *file) dbg("pid: %d, state: 0x%lx", task_pid_nr(current), fimc->state); - if (mutex_lock_interruptible(&fimc->lock)) - return -ERESTARTSYS; + mutex_lock(&fimc->lock); if (--fimc->vid_cap.refcnt == 0) { clear_bit(ST_CAPT_BUSY, &fimc->state); diff --git a/drivers/media/platform/s5p-fimc/fimc-m2m.c b/drivers/media/platform/s5p-fimc/fimc-m2m.c index 4500e44..62afed3 100644 --- a/drivers/media/platform/s5p-fimc/fimc-m2m.c +++ b/drivers/media/platform/s5p-fimc/fimc-m2m.c @@ -718,8 +718,7 @@ static int fimc_m2m_release(struct file *file) dbg("pid: %d, state: 0x%lx, refcnt= %d", task_pid_nr(current), fimc->state, fimc->m2m.refcnt); - if (mutex_lock_interruptible(&fimc->lock)) - return -ERESTARTSYS; + mutex_lock(&fimc->lock); v4l2_m2m_ctx_release(ctx->m2m_ctx); fimc_ctrls_delete(ctx); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
