[PATCH net-next v2] drivers: net: xgene: Fix dma_unmap_single() size
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COOLING10d
LANDED
From: Thomas Fourier <hidden>
Date: 2026-10-15 12:46:36
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lkml
Subsystem:
applied micro (apm) x-gene soc ethernet driver, networking drivers, the rest · Maintainers:
Iyappan Subramanian, Keyur Chudgar, Quan Nguyen, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Status: Landed in mainline as 03977f8f1a63 on 2026-10-20.
In xgene_enet_refill_bufpool(), the skb->data is dma-mapped with length
len which is set to XGENE_ENET_STD_MTU which equals 1536. However, in
xgene_enet_delete_bufpool(), the same buffer is unmapped with length
XGENE_ENET_MAX_MTU which is 9600. This may erroneously unmap other
DMA buffers or cause other issues.
Change unmap length to XGENE_ENET_STD_MTU.
Fixes: a9380b0f7be8 ("drivers: net: xgene: Add support for Jumbo frame")
Signed-off-by: Thomas Fourier <redacted>
---
v1->v2:
- Fix function name in commit description
- Change Fixes tag
drivers/net/ethernet/apm/xgene/xgene_enet_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
index 507db46daf2b..2ddcbf27014e 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c@@ -185,7 +185,7 @@ static void xgene_enet_delete_bufpool(struct xgene_enet_desc_ring *buf_pool) raw_desc = &buf_pool->raw_desc16[i]; dma_addr = GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)); - dma_unmap_single(dev, dma_addr, XGENE_ENET_MAX_MTU, + dma_unmap_single(dev, dma_addr, XGENE_ENET_STD_MTU, DMA_FROM_DEVICE); } }
--
2.53.0