On Tue, Mar 05, 2013 at 02:55:31PM +0530, Padmavathi Venna wrote:
> This patch register the dma controller with generic dma helpers only
> in DT case. This also adds some extra error handling in the driver.
>
> Signed-off-by: Padmavathi Venna <padma.v@xxxxxxxxxxx>
> Reported-by: Sachin Kamat <sachin.kamat@xxxxxxxxxx>
> ---
>
> Based on Vinod Koul next branch.
>
> Changes since V1:
> - return silently when of_dma_controller_register fails, as
> suggested by Arnd.
>
> drivers/dma/pl330.c | 38 +++++++++++++++++++++++++++-----------
> 1 files changed, 27 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
> index 7181531..5dbc594 100644
> --- a/drivers/dma/pl330.c
> +++ b/drivers/dma/pl330.c
> @@ -2882,7 +2882,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
> {
> struct dma_pl330_platdata *pdat;
> struct dma_pl330_dmac *pdmac;
> - struct dma_pl330_chan *pch;
> + struct dma_pl330_chan *pch, *_p;
> struct pl330_info *pi;
> struct dma_device *pd;
> struct resource *res;
> @@ -2984,7 +2984,16 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
> ret = dma_async_device_register(pd);
> if (ret) {
> dev_err(&adev->dev, "unable to register DMAC\n");
> - goto probe_err2;
> + goto probe_err3;
> + }
> +
> + if (adev->dev.of_node) {
> + ret = of_dma_controller_register(adev->dev.of_node,
> + of_dma_pl330_xlate, pdmac);
> + if (ret) {
> + dev_err(&adev->dev,
> + "unable to register DMA to the generic DT DMA helpers\n");
Indent?
> + }
> }
>
> dev_info(&adev->dev,
> @@ -2995,16 +3004,21 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
> pi->pcfg.data_bus_width / 8, pi->pcfg.num_chan,
> pi->pcfg.num_peri, pi->pcfg.num_events);
>
> - ret = of_dma_controller_register(adev->dev.of_node,
> - of_dma_pl330_xlate, pdmac);
> - if (ret) {
> - dev_err(&adev->dev,
> - "unable to register DMA to the generic DT DMA helpers\n");
> - goto probe_err2;
> - }
> -
> return 0;
> +probe_err3:
> + amba_set_drvdata(adev, NULL);
>
> + /* Idle the DMAC */
> + list_for_each_entry_safe(pch, _p, &pdmac->ddma.channels,
> + chan.device_node) {
> +
> + /* Remove the channel */
> + list_del(&pch->chan.device_node);
> +
> + /* Flush the channel */
> + pl330_control(&pch->chan, DMA_TERMINATE_ALL, 0);
> + pl330_free_chan_resources(&pch->chan);
free_chan for error handling in probe?
> + }
> probe_err2:
> pl330_del(pi);
> probe_err1:
> @@ -3023,8 +3037,10 @@ static int pl330_remove(struct amba_device *adev)
> if (!pdmac)
> return 0;
>
> - of_dma_controller_free(adev->dev.of_node);
> + if (adev->dev.of_node)
> + of_dma_controller_free(adev->dev.of_node);
>
> + dma_async_device_unregister(&pdmac->ddma);
> amba_set_drvdata(adev, NULL);
>
> /* Idle the DMAC */
> --
> 1.7.4.4
>
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