From: Antoine Tenart <antoine.tenart@bootlin.com>
To: davem@davemloft.net, yelena@marvell.com
Cc: Antoine Tenart <antoine.tenart@bootlin.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
thomas.petazzoni@bootlin.com, maxime.chevallier@bootlin.com,
gregory.clement@bootlin.com, miquel.raynal@bootlin.com,
nadavh@marvell.com, stefanc@marvell.com, ymarkman@marvell.com,
mw@semihalf.com
Subject: [PATCH net] net: mvneta: fix the Rx desc buffer DMA unmapping
Date: Wed, 19 Sep 2018 15:29:06 +0200 [thread overview]
Message-ID: <20180919132906.26868-1-antoine.tenart@bootlin.com> (raw)
With CONFIG_DMA_API_DEBUG enabled we now get a warning when using the
mvneta driver:
mvneta d0030000.ethernet: DMA-API: device driver frees DMA memory with
wrong function [device address=0x000000001165b000] [size=4096 bytes]
[mapped as page] [unmapped as single]
This is because when using the s/w buffer management, the Rx descriptor
buffer is mapped with dma_map_page but unmapped with dma_unmap_single.
This patch fixes this by using the right unmapping function.
Fixes: 562e2f467e71 ("net: mvneta: Improve the buffer allocation method for SWBM")
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
---
drivers/net/ethernet/marvell/mvneta.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index bc80a678abc3..2db9708f2e24 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -2008,8 +2008,8 @@ static int mvneta_rx_swbm(struct napi_struct *napi,
skb_add_rx_frag(rxq->skb, frag_num, page,
frag_offset, frag_size,
PAGE_SIZE);
- dma_unmap_single(dev->dev.parent, phys_addr,
- PAGE_SIZE, DMA_FROM_DEVICE);
+ dma_unmap_page(dev->dev.parent, phys_addr,
+ PAGE_SIZE, DMA_FROM_DEVICE);
rxq->left_size -= frag_size;
}
} else {
--
2.17.1
next reply other threads:[~2018-09-19 13:35 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-19 13:29 Antoine Tenart [this message]
2018-09-20 4:25 ` [PATCH net] net: mvneta: fix the Rx desc buffer DMA unmapping David Miller
2018-09-20 10:14 ` [EXT] " Yelena Krivosheev
2018-09-20 11:20 ` Antoine Tenart
2018-09-20 14:59 ` Gregory CLEMENT
2018-09-22 7:07 ` Yelena Krivosheev
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