mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-08-31 08:15:07 -04:00
Code Issues Packages Projects Releases Wiki Activity

net: airoha: npu: fix missing streaming DMA mask

Browse Source 
The driver calls dma_set_coherent_mask() but never dma_set_mask(),
leaving the streaming DMA mask at the bus default. On the non-coherent
EN7581 platform (Cortex-A53), this causes the NPU mailbox to hang
after approximately 41 calls when using streaming DMA mappings.

Replace dma_set_coherent_mask() with dma_set_mask_and_coherent() to
set both the streaming and coherent DMA masks, matching standard
driver practice.

Fixes: 6f884eb87a ("net: airoha: Fix DMA direction for NPU mailbox buffer")
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20260814110017.2795022-1-pawlik.dan@gmail.com/
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20260809152813.585797-1-pawlik.dan@gmail.com/
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20260805070851.2885888-1-pawlik.dan@gmail.com/
Signed-off-by: Daniel Pawlik <pawlik.dan@gmail.com>
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20260820085941.380401-1-pawlik.dan@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Daniel Pawlik
2026-08-20 10:59:40 +02:00
committed by Jakub Kicinski
parent 81eb1867e0
commit 6fe7e31a45
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ethernet/airoha/airoha_npu.c
View File

@@ -768,7 +768,7 @@ static int airoha_npu_probe(struct platform_device *pdev)
npu->irqs[i] = irq;
}
err = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
if (err)
return err;