Hi Fabio,
Am Montag, den 22.07.2013, 22:38 -0300 schrieb Fabio Estevam:
> From: Fabio Estevam <fabio.este...@freescale.com>
>
> Some resources were not being released in the error path and some were
> released
> in the incorrect order.
>
> Signed-off-by: Fabio Estevam <fabio.este...@freescale.com>
> ---
> Changes since v2:
> - Newly introduced in this series
>
> drivers/media/platform/coda.c | 32 ++++++++++++++++++++------------
> 1 file changed, 20 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/media/platform/coda.c b/drivers/media/platform/coda.c
> index df4ada88..ea16c20 100644
> --- a/drivers/media/platform/coda.c
> +++ b/drivers/media/platform/coda.c
> @@ -1514,15 +1514,17 @@ static int coda_open(struct file *file)
> int ret = 0;
> int idx;
>
> - idx = coda_next_free_instance(dev);
> - if (idx >= CODA_MAX_INSTANCES)
> - return -EBUSY;
> - set_bit(idx, &dev->instance_mask);
> -
> ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
> if (!ctx)
> return -ENOMEM;
>
> + idx = coda_next_free_instance(dev);
> + if (idx >= CODA_MAX_INSTANCES) {
> + ret = -EBUSY;
> + goto err_coda_max;
> + }
> + set_bit(idx, &dev->instance_mask);
> +
> v4l2_fh_init(&ctx->fh, video_devdata(file));
> file->private_data = &ctx->fh;
> v4l2_fh_add(&ctx->fh);
> @@ -1537,12 +1539,12 @@ static int coda_open(struct file *file)
>
> v4l2_err(&dev->v4l2_dev, "%s return error (%d)\n",
> __func__, ret);
> - goto err;
> + goto err_ctx_init;
> }
> ret = coda_ctrls_setup(ctx);
> if (ret) {
> v4l2_err(&dev->v4l2_dev, "failed to setup coda controls\n");
> - goto err;
> + goto err_ctrls_setup;
> }
>
> ctx->fh.ctrl_handler = &ctx->ctrls;
> @@ -1552,7 +1554,7 @@ static int coda_open(struct file *file)
> if (!ctx->parabuf.vaddr) {
> v4l2_err(&dev->v4l2_dev, "failed to allocate parabuf");
> ret = -ENOMEM;
> - goto err;
> + goto err_dma_alloc;
> }
>
> coda_lock(ctx);
> @@ -1567,9 +1569,15 @@ static int coda_open(struct file *file)
>
> return 0;
>
> -err:
> +err_dma_alloc:
> + v4l2_ctrl_handler_free(&ctx->ctrls);
> +err_ctrls_setup:
> + v4l2_m2m_ctx_release(ctx->m2m_ctx);
> +err_ctx_init:
> v4l2_fh_del(&ctx->fh);
> v4l2_fh_exit(&ctx->fh);
> + clear_bit(ctx->idx, &dev->instance_mask);
> +err_coda_max:
> kfree(ctx);
> return ret;
> }
> @@ -1582,16 +1590,16 @@ static int coda_release(struct file *file)
> v4l2_dbg(1, coda_debug, &dev->v4l2_dev, "Releasing instance %p\n",
> ctx);
>
> + clk_disable_unprepare(dev->clk_ahb);
> + clk_disable_unprepare(dev->clk_per);
> coda_lock(ctx);
> list_del(&ctx->list);
> coda_unlock(ctx);
>
> dma_free_coherent(&dev->plat_dev->dev, CODA_PARA_BUF_SIZE,
> ctx->parabuf.vaddr, ctx->parabuf.paddr);
> - v4l2_m2m_ctx_release(ctx->m2m_ctx);
> v4l2_ctrl_handler_free(&ctx->ctrls);
> - clk_disable_unprepare(dev->clk_per);
> - clk_disable_unprepare(dev->clk_ahb);
> + v4l2_m2m_ctx_release(ctx->m2m_ctx);
the clocks must not be disabled until after v4l2_m2m_ctx_release
returns: this function might wait for the currently running job to
finish.
> v4l2_fh_del(&ctx->fh);
> v4l2_fh_exit(&ctx->fh);
> clear_bit(ctx->idx, &dev->instance_mask);
regards
Philipp
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