3.2.80-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
commit 3af0d554c1ce11e9d0953381ff566271f9ab81a9 upstream.
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@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
drivers/net/ethernet/micrel/ks8842.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
--- a/drivers/net/ethernet/micrel/ks8842.c
+++ b/drivers/net/ethernet/micrel/ks8842.c
@@ -562,8 +562,8 @@ static int __ks8842_start_new_rx_dma(str
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;
}
@@ -574,8 +574,10 @@ static int __ks8842_start_new_rx_dma(str
sg, 1, DMA_FROM_DEVICE,
DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP);
- if (!ctl->adesc)
+ if (!ctl->adesc) {
+ err = -ENOMEM;
goto out;
+ }
ctl->adesc->callback_param = netdev;
ctl->adesc->callback = ks8842_dma_rx_cb;
@@ -586,7 +588,7 @@ static int __ks8842_start_new_rx_dma(str
goto out;
}
- return err;
+ return 0;
out:
if (sg_dma_address(sg))
dma_unmap_single(adapter->dev, sg_dma_address(sg),
--
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