* [PATCH] dmaengine: ti: k3-udma: Add missing dma_sync call for rx flush descriptor
@ 2020-05-12 13:45 Peter Ujfalusi
2020-05-15 5:54 ` Vinod Koul
0 siblings, 1 reply; 2+ messages in thread
From: Peter Ujfalusi @ 2020-05-12 13:45 UTC (permalink / raw)
To: vkoul; +Cc: dmaengine, dan.j.williams
The TR mode rx flush descriptor did not had a dma_sync_single_for_device()
call to make sure that the DMA see the correct information.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
drivers/dma/ti/k3-udma.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 20b1f94de86c..5afd0fde4706 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -3472,6 +3472,9 @@ static int udma_setup_rx_flush(struct udma_dev *ud)
tr_req->icnt0 = rx_flush->buffer_size;
tr_req->icnt1 = 1;
+ dma_sync_single_for_device(dev, hwdesc->cppi5_desc_paddr,
+ hwdesc->cppi5_desc_size, DMA_TO_DEVICE);
+
/* Set up descriptor to be used for packet mode */
hwdesc = &rx_flush->hwdescs[1];
hwdesc->cppi5_desc_size = ALIGN(sizeof(struct cppi5_host_desc_t) +
--
Peter
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
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2020-05-12 13:45 [PATCH] dmaengine: ti: k3-udma: Add missing dma_sync call for rx flush descriptor Peter Ujfalusi
2020-05-15 5:54 ` Vinod Koul
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