From: Dan Carpenter <dan.carpenter@oracle.com>
To: "David S. Miller" <davem@davemloft.net>,
"Richard Röjfors" <richard.rojfors@pelagicore.com>
Cc: netdev@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] ethernet: micrel: fix some error codes
Date: Wed, 16 Mar 2016 07:45:10 +0000 [thread overview]
Message-ID: <20160316074510.GF12860@mwanda> (raw)
There were two issues here:
1) dma_mapping_error() return true/false but we want to return -ENOMEM
2) If dmaengine_prep_slave_sg() failed then "err" wasn't set but
presumably that should be -ENOMEM as well.
I changed the success path to "return 0;" instead of "return ret;" for
clarity.
Fixes: 94fe8c683cea ('ks8842: Support DMA when accessed via timberdale')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/drivers/net/ethernet/micrel/ks8842.c b/drivers/net/ethernet/micrel/ks8842.c
index 09d2e16..cb0102d 100644
--- a/drivers/net/ethernet/micrel/ks8842.c
+++ b/drivers/net/ethernet/micrel/ks8842.c
@@ -561,8 +561,8 @@ static int __ks8842_start_new_rx_dma(struct net_device *netdev)
sg_init_table(sg, 1);
sg_dma_address(sg) = dma_map_single(adapter->dev,
ctl->skb->data, DMA_BUFFER_SIZE, DMA_FROM_DEVICE);
- err = dma_mapping_error(adapter->dev, sg_dma_address(sg));
- if (unlikely(err)) {
+ if (dma_mapping_error(adapter->dev, sg_dma_address(sg))) {
+ err = -ENOMEM;
sg_dma_address(sg) = 0;
goto out;
}
@@ -572,8 +572,10 @@ static int __ks8842_start_new_rx_dma(struct net_device *netdev)
ctl->adesc = dmaengine_prep_slave_sg(ctl->chan,
sg, 1, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT);
- if (!ctl->adesc)
+ if (!ctl->adesc) {
+ err = -ENOMEM;
goto out;
+ }
ctl->adesc->callback_param = netdev;
ctl->adesc->callback = ks8842_dma_rx_cb;
@@ -584,7 +586,7 @@ static int __ks8842_start_new_rx_dma(struct net_device *netdev)
goto out;
}
- return err;
+ return 0;
out:
if (sg_dma_address(sg))
dma_unmap_single(adapter->dev, sg_dma_address(sg),
next reply other threads:[~2016-03-16 7:45 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-16 7:45 Dan Carpenter [this message]
2016-03-18 23:40 ` [patch] ethernet: micrel: fix some error codes David Miller
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