| Message ID | 1415879762-12177-1-git-send-email-stefan@agner.ch (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
On 2014-11-13 12:56, Stefan Agner wrote: > If the current transfer control descriptor (TCD) was not yet started, > the address will be the same as the initial address. Hence test if the > current address is less than or equal to the start address of each TCD. > > Signed-off-by: Stefan Agner <stefan@agner.ch> > --- > This bug was discovered during development on a AC97 capable SAI driver, > I don't think that this is currently a issue since only a few drivers > use DMA on Vybrid so far and don't use the remaining bytes information. > > drivers/dma/fsl-edma.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/dma/fsl-edma.c b/drivers/dma/fsl-edma.c > index 3c5711d..58c6fc7 100644 > --- a/drivers/dma/fsl-edma.c > +++ b/drivers/dma/fsl-edma.c > @@ -386,7 +386,7 @@ static size_t fsl_edma_desc_residue(struct > fsl_edma_chan *fsl_chan, > &(edesc->tcd[i].vtcd->daddr)); > > len -= size; > - if (cur_addr > dma_addr && cur_addr < dma_addr + size) { > + if (cur_addr >= dma_addr && cur_addr < dma_addr + size) { > len += dma_addr + size - cur_addr; > break; > } Hi Vinod, Afaik, this has not been applied yet, any reasons why? -- Stefan -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Thu, Nov 13, 2014 at 12:56:02PM +0100, Stefan Agner wrote: > If the current transfer control descriptor (TCD) was not yet started, > the address will be the same as the initial address. Hence test if the > current address is less than or equal to the start address of each TCD. Applied, thanks
diff --git a/drivers/dma/fsl-edma.c b/drivers/dma/fsl-edma.c index 3c5711d..58c6fc7 100644 --- a/drivers/dma/fsl-edma.c +++ b/drivers/dma/fsl-edma.c @@ -386,7 +386,7 @@ static size_t fsl_edma_desc_residue(struct fsl_edma_chan *fsl_chan, &(edesc->tcd[i].vtcd->daddr)); len -= size; - if (cur_addr > dma_addr && cur_addr < dma_addr + size) { + if (cur_addr >= dma_addr && cur_addr < dma_addr + size) { len += dma_addr + size - cur_addr; break; }
If the current transfer control descriptor (TCD) was not yet started, the address will be the same as the initial address. Hence test if the current address is less than or equal to the start address of each TCD. Signed-off-by: Stefan Agner <stefan@agner.ch> --- This bug was discovered during development on a AC97 capable SAI driver, I don't think that this is currently a issue since only a few drivers use DMA on Vybrid so far and don't use the remaining bytes information. drivers/dma/fsl-edma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)