summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorChristoph Hellwig <hch@lst.de>2018-10-09 16:57:20 +0200
committerDavid S. Miller <davem@davemloft.net>2018-10-10 22:38:50 -0700
commit1d9d8be91788416d17862ec5a30fff33281ddef6 (patch)
treee4a8df6c0f0097564009d27f8d684b79f4dee589
parent0e21b2258a0f8ab5537387b3f1a43b672ce62670 (diff)
downloadtalos-obmc-linux-1d9d8be91788416d17862ec5a30fff33281ddef6.tar.gz
talos-obmc-linux-1d9d8be91788416d17862ec5a30fff33281ddef6.zip
fore200e: check for dma mapping failures
The driver was lacking any handling for failures from the DMA mapping routines. With an iommu or swiotlb this can be fatal. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/atm/fore200e.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/atm/fore200e.c b/drivers/atm/fore200e.c
index 7eda1a8c3d8c..2b5dc8fe1d85 100644
--- a/drivers/atm/fore200e.c
+++ b/drivers/atm/fore200e.c
@@ -195,6 +195,10 @@ fore200e_chunk_alloc(struct fore200e* fore200e, struct chunk* chunk, int size, i
chunk->dma_addr = dma_map_single(fore200e->dev, chunk->align_addr,
size, direction);
+ if (dma_mapping_error(fore200e->dev, chunk->dma_addr)) {
+ kfree(chunk->alloc_addr);
+ return -ENOMEM;
+ }
return 0;
}
@@ -576,6 +580,8 @@ fore200e_pca_prom_read(struct fore200e* fore200e, struct prom_data* prom)
prom_dma = dma_map_single(fore200e->dev, prom, sizeof(struct prom_data),
DMA_FROM_DEVICE);
+ if (dma_mapping_error(fore200e->dev, prom_dma))
+ return -ENOMEM;
fore200e->bus->write(prom_dma, &entry->cp_entry->cmd.prom_block.prom_haddr);
@@ -1597,6 +1603,11 @@ fore200e_send(struct atm_vcc *vcc, struct sk_buff *skb)
tpd = entry->tpd;
tpd->tsd[ 0 ].buffer = dma_map_single(fore200e->dev, data, tx_len,
DMA_TO_DEVICE);
+ if (dma_mapping_error(fore200e->dev, tpd->tsd[0].buffer)) {
+ if (tx_copy)
+ kfree(data);
+ return -ENOMEM;
+ }
tpd->tsd[ 0 ].length = tx_len;
FORE200E_NEXT_ENTRY(txq->head, QUEUE_SIZE_TX);
@@ -1671,6 +1682,8 @@ fore200e_getstats(struct fore200e* fore200e)
stats_dma_addr = dma_map_single(fore200e->dev, fore200e->stats,
sizeof(struct stats), DMA_FROM_DEVICE);
+ if (dma_mapping_error(fore200e->dev, stats_dma_addr))
+ return -ENOMEM;
FORE200E_NEXT_ENTRY(cmdq->head, QUEUE_SIZE_CMD);
OpenPOWER on IntegriCloud