2020-02-09 16:42:12

by Dmitry Osipenko

Subject: [PATCH v8 11/19] dmaengine: tegra-apb: Remove duplicated pending_sg_req checks

There are few place in the code which check whether pending_sg_req list is
empty despite of the check already being done. Let's remove the duplicated
checks to keep code clean.

Signed-off-by: Dmitry Osipenko <[email protected]>
---
drivers/dma/tegra20-apb-dma.c | 12 ------------
1 file changed, 12 deletions(-)

diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
index 22b88ccff05d..049e98ae1240 100644
--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c
@@ -504,9 +504,6 @@ static void tdc_start_head_req(struct tegra_dma_channel *tdc)
{
struct tegra_dma_sg_req *sg_req;

- if (list_empty(&tdc->pending_sg_req))
- return;
-
sg_req = list_first_entry(&tdc->pending_sg_req, typeof(*sg_req), node);
tegra_dma_start(tdc, sg_req);
sg_req->configured = true;
@@ -518,9 +515,6 @@ static void tdc_configure_next_head_desc(struct tegra_dma_channel *tdc)
{
struct tegra_dma_sg_req *hsgreq, *hnsgreq;

- if (list_empty(&tdc->pending_sg_req))
- return;
-
hsgreq = list_first_entry(&tdc->pending_sg_req, typeof(*hsgreq), node);
if (!list_is_last(&hsgreq->node, &tdc->pending_sg_req)) {
hnsgreq = list_first_entry(&hsgreq->node, typeof(*hnsgreq),
@@ -567,12 +561,6 @@ static bool handle_continuous_head_request(struct tegra_dma_channel *tdc,
{
struct tegra_dma_sg_req *hsgreq;

- if (list_empty(&tdc->pending_sg_req)) {
- dev_err(tdc2dev(tdc), "DMA is running without req\n");
- tegra_dma_stop(tdc);
- return false;
- }
-
/*
* Check that head req on list should be in flight.
* If it is not in flight then abort transfer as
--
2.24.0

2020-02-14 14:13:39

by Jon Hunter

Subject: Re: [PATCH v8 11/19] dmaengine: tegra-apb: Remove duplicated pending_sg_req checks

On 09/02/2020 16:33, Dmitry Osipenko wrote:
> There are few place in the code which check whether pending_sg_req list is
> empty despite of the check already being done. Let's remove the duplicated
> checks to keep code clean.
>
> Signed-off-by: Dmitry Osipenko <[email protected]>
> ---
> drivers/dma/tegra20-apb-dma.c | 12 ------------
> 1 file changed, 12 deletions(-)
>
> diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
> index 22b88ccff05d..049e98ae1240 100644
> --- a/drivers/dma/tegra20-apb-dma.c
> +++ b/drivers/dma/tegra20-apb-dma.c
> @@ -504,9 +504,6 @@ static void tdc_start_head_req(struct tegra_dma_channel *tdc)
> {
> struct tegra_dma_sg_req *sg_req;
>
> - if (list_empty(&tdc->pending_sg_req))
> - return;
> -
> sg_req = list_first_entry(&tdc->pending_sg_req, typeof(*sg_req), node);
> tegra_dma_start(tdc, sg_req);
> sg_req->configured = true;
> @@ -518,9 +515,6 @@ static void tdc_configure_next_head_desc(struct tegra_dma_channel *tdc)
> {
> struct tegra_dma_sg_req *hsgreq, *hnsgreq;
>
> - if (list_empty(&tdc->pending_sg_req))
> - return;
> -
> hsgreq = list_first_entry(&tdc->pending_sg_req, typeof(*hsgreq), node);
> if (!list_is_last(&hsgreq->node, &tdc->pending_sg_req)) {
> hnsgreq = list_first_entry(&hsgreq->node, typeof(*hnsgreq),
> @@ -567,12 +561,6 @@ static bool handle_continuous_head_request(struct tegra_dma_channel *tdc,
> {
> struct tegra_dma_sg_req *hsgreq;
>
> - if (list_empty(&tdc->pending_sg_req)) {
> - dev_err(tdc2dev(tdc), "DMA is running without req\n");
> - tegra_dma_stop(tdc);
> - return false;
> - }
> -
> /*
> * Check that head req on list should be in flight.
> * If it is not in flight then abort transfer as
>

Acked-by: Jon Hunter <[email protected]>

Thanks
Jon

--
nvpublic