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Re: spi: spi-davinci: Fix direction in dma_map_single()
On 04/18/2013 03:31 PM, Christian Eggers wrote:
> Commit 048177ce3b3962852fd34a7e04938959271c7e70 (spi: spi-davinci:
>
> convert to DMA engine API) introduced a regression: dma_map_single()
>
> is called with direction DMA_FROM_DEVICE for rx and for tx.
>
> Signed-off-by: Christian Eggers
>
> Cc: sta...@vger.kernel.org
Cc: sta...@vger.kernel.org # v3.7.x+
will get this applied to the correct stable kernels.
I'm wearing the brown bag for this one so other than fixing the Cc: it
looks good.
Acked-by: Matt Porter
> --- drivers/spi/spi-davinci.c.orig 2013-04-18 20:54:02.728719412 +0200
>
> +++ drivers/spi/spi-davinci.c 2013-04-18 20:54:51.900623956 +0200
>
> @@ -608,7 +608,7 @@ static int davinci_spi_bufs(struct spi_d
>
> else
>
> buf = (void *)t->tx_buf;
>
> t->tx_dma = dma_map_single(&spi->dev, buf,
>
> - t->len, DMA_FROM_DEVICE);
>
> + t->len, DMA_TO_DEVICE);
>
> if (!t->tx_dma) {
>
> ret = -EFAULT;
>
> goto err_tx_map;
>
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spi: spi-davinci: Fix direction in dma_map_single()
Commit 048177ce3b3962852fd34a7e04938959271c7e70 (spi: spi-davinci:
convert to DMA engine API) introduced a regression: dma_map_single()
is called with direction DMA_FROM_DEVICE for rx and for tx.
Signed-off-by: Christian Eggers
Cc: sta...@vger.kernel.org
---
--- drivers/spi/spi-davinci.c.orig 2013-04-18 20:54:02.728719412 +0200
+++ drivers/spi/spi-davinci.c 2013-04-18 20:54:51.900623956 +0200
@@ -608,7 +608,7 @@ static int davinci_spi_bufs(struct spi_d
else
buf = (void *)t->tx_buf;
t->tx_dma = dma_map_single(&spi->dev, buf,
- t->len, DMA_FROM_DEVICE);
+ t->len, DMA_TO_DEVICE);
if (!t->tx_dma) {
ret = -EFAULT;
goto err_tx_map;
--
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spi: spi-davinci: Fix direction in dma_map_single()
Commit 048177ce3b3962852fd34a7e04938959271c7e70 (spi: spi-davinci:
convert to DMA engine API) introduced a regression: dma_map_single()
is called with direction DMA_FROM_DEVICE for rx and for tx.
Signed-off-by: Christian Eggers
Cc: sta...@vger.kernel.org
---
--- drivers/spi/spi-davinci.c.orig 2013-04-18 20:54:02.728719412 +0200
+++ drivers/spi/spi-davinci.c 2013-04-18 20:54:51.900623956 +0200
@@ -608,7 +608,7 @@ static int davinci_spi_bufs(struct spi_d
else
buf = (void *)t->tx_buf;
t->tx_dma = dma_map_single(&spi->dev, buf,
- t->len, DMA_FROM_DEVICE);
+ t->len, DMA_TO_DEVICE);
if (!t->tx_dma) {
ret = -EFAULT;
goto err_tx_map;
--
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Re: [PATCH] spi/s3c64xx: Fix non-dmaengine usage
On Thursday 18 April 2013, Mark Brown wrote: > The multiplatform conversion in commit 788437 (spi: s3c64xx: move to > generic dmaengine API) tested for the use of the Samsung-specific DMA > API with SAMSUNG_DMADEV when in fact S3C_DMA should be used. This > renderd DMA based transfers non-functional on platforms not using > dmaengine. > > Signed-off-by: Mark Brown Acked-by: Arnd Bergmann Sorry for the confusion on my part. I thought that S3C_DMA was referring to just the S3C specific functionality while SAMSUNG_DMADEV was the wrapper around it, while in truth SAMSUNG_DMADEV is the wrapper around just the dmaengine API. Arnd -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ spi-devel-general mailing list spi-devel-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/spi-devel-general
[PATCH] MAINTAINERS: Add git repository and update my address
Signed-off-by: Mark Brown --- MAINTAINERS |3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/MAINTAINERS b/MAINTAINERS index a3be666..0c9c104 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7431,9 +7431,10 @@ S: Maintained F: drivers/clk/spear/ SPI SUBSYSTEM -M: Mark Brown +M: Mark Brown M: Grant Likely L: spi-devel-general@lists.sourceforge.net +T: git git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git Q: http://patchwork.kernel.org/project/spi-devel-general/list/ S: Maintained F: Documentation/spi/ -- 1.7.10.4 -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ spi-devel-general mailing list spi-devel-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/spi-devel-general
[PATCH] spi/s3c64xx: Check for errors in dmaengine prepare_transfer()
Don't silently ignore errors, report them.
Signed-off-by: Mark Brown
---
drivers/spi/spi-s3c64xx.c | 26 +-
1 file changed, 25 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 6d6537d..5000586 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -421,6 +421,7 @@ static int s3c64xx_spi_prepare_transfer(struct spi_master
*spi)
dma_filter_fn filter = sdd->cntrlr_info->filter;
struct device *dev = &sdd->pdev->dev;
dma_cap_mask_t mask;
+ int ret;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
@@ -428,11 +429,34 @@ static int s3c64xx_spi_prepare_transfer(struct spi_master
*spi)
/* Acquire DMA channels */
sdd->rx_dma.ch = dma_request_slave_channel_compat(mask, filter,
(void*)sdd->rx_dma.dmach, dev, "rx");
+ if (!sdd->rx_dma.ch) {
+ dev_err(dev, "Failed to get RX DMA channel\n");
+ ret = -EBUSY;
+ goto out;
+ }
+
sdd->tx_dma.ch = dma_request_slave_channel_compat(mask, filter,
(void*)sdd->tx_dma.dmach, dev, "tx");
- pm_runtime_get_sync(&sdd->pdev->dev);
+ if (!sdd->tx_dma.ch) {
+ dev_err(dev, "Failed to get TX DMA channel\n");
+ ret = -EBUSY;
+ goto out_rx;
+ }
+
+ ret = pm_runtime_get_sync(&sdd->pdev->dev);
+ if (ret != 0) {
+ dev_err(dev, "Failed to enable device: %d\n", ret);
+ goto out_tx;
+ }
return 0;
+
+out_tx:
+ dma_release_channel(sdd->tx_dma.ch);
+out_rx:
+ dma_release_channel(sdd->rx_dma.ch);
+out:
+ return ret;
}
static int s3c64xx_spi_unprepare_transfer(struct spi_master *spi)
--
1.7.10.4
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[PATCH] spi/s3c64xx: Fix non-dmaengine usage
The multiplatform conversion in commit 788437 (spi: s3c64xx: move to
generic dmaengine API) tested for the use of the Samsung-specific DMA
API with SAMSUNG_DMADEV when in fact S3C_DMA should be used. This
renderd DMA based transfers non-functional on platforms not using
dmaengine.
Signed-off-by: Mark Brown
---
drivers/spi/spi-s3c64xx.c |6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 4ab992b..6d6537d 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -34,7 +34,7 @@
#include
-#ifdef CONFIG_SAMSUNG_DMADEV
+#ifdef CONFIG_S3C_DMA
#include
#endif
@@ -199,7 +199,7 @@ struct s3c64xx_spi_driver_data {
unsignedcur_speed;
struct s3c64xx_spi_dma_data rx_dma;
struct s3c64xx_spi_dma_data tx_dma;
-#ifdef CONFIG_SAMSUNG_DMADEV
+#ifdef CONFIG_S3C_DMA
struct samsung_dma_ops *ops;
#endif
struct s3c64xx_spi_port_config *port_conf;
@@ -283,7 +283,7 @@ static void s3c64xx_spi_dmacb(void *data)
spin_unlock_irqrestore(&sdd->lock, flags);
}
-#ifdef CONFIG_SAMSUNG_DMADEV
+#ifdef CONFIG_S3C_DMA
/* FIXME: remove this section once arch/arm/mach-s3c64xx uses dmaengine */
static struct s3c2410_dma_client s3c64xx_spi_dma_client = {
--
1.7.10.4
--
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Moins 15 pourcent sur la nouvelle collection Lee
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