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Groups > linux.kernel > #1401376
| From | Jiada Wang <jiada_wang@mentor.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 03/10] dma: imx-sdma: clear BD_RROR flag before pass it to sdma script |
| Date | 2016-05-16 10:50 +0200 |
| Message-ID | <rzmnU-4GN-9@gated-at.bofh.it> (permalink) |
| References | <rzmed-4Dx-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Previously in cyclic dma mode when sdma transfer fails for one buffer, it will mask BD_RROR flag for that buffer descriptor (BD). This flag won't be cleared unless a new cyclic dma transfer is prepared, so if sdma script next time iterates to the same BD, even this time the transfer is successful, but as BD_RROR flag is set, client side will still think the transfer failed. This patch clears BD_RROR flag before pass it to sdma script. Signed-off-by: Jiada Wang <jiada_wang@mentor.com> --- drivers/dma/imx-sdma.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index 887e4e5..1489de0 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -671,6 +671,7 @@ static void sdma_handle_channel_loop(struct sdma_channel *sdmac) if (bd->mode.status & BD_RROR) sdmac->status = DMA_ERROR; + bd->mode.status &= ~BD_RROR; bd->mode.status |= BD_DONE; sdmac->buf_tail++; sdmac->buf_tail %= sdmac->num_bd; -- 2.4.5
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[PATCH v1 00/10] *** imx-sdma: misc fix *** Jiada Wang <jiada_wang@mentor.com> - 2016-05-16 10:40 +0200 [PATCH 06/10] dma: imx-sdma: add terminate_all support Jiada Wang <jiada_wang@mentor.com> - 2016-05-16 10:40 +0200 [PATCH 02/10] dma: imx-sdma: don't update BD in isr routine Jiada Wang <jiada_wang@mentor.com> - 2016-05-16 10:40 +0200 [PATCH 08/10] dma: imx-sdma: abort updating channel when it has been terminated Jiada Wang <jiada_wang@mentor.com> - 2016-05-16 10:40 +0200 [PATCH 10/10] dma: imx-sdma: clear channel0 interrupt bit in irq routine Jiada Wang <jiada_wang@mentor.com> - 2016-05-16 10:40 +0200 [PATCH 07/10] dma: imx-sdma: Add synchronization support Jiada Wang <jiada_wang@mentor.com> - 2016-05-16 10:40 +0200 [PATCH 01/10] dma: imx-sdma: use chn_real_count to report residue for UART Jiada Wang <jiada_wang@mentor.com> - 2016-05-16 10:50 +0200 [PATCH 05/10] dma: imx-sdma: add flag to indicate SDMA channel state Jiada Wang <jiada_wang@mentor.com> - 2016-05-16 10:50 +0200 [PATCH 03/10] dma: imx-sdma: clear BD_RROR flag before pass it to sdma script Jiada Wang <jiada_wang@mentor.com> - 2016-05-16 10:50 +0200 Re: [PATCH v1 00/10] *** imx-sdma: misc fix *** Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> - 2016-05-16 13:10 +0200
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