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ibmvnic: Fix DMA mapping mistakes 

Fix some mistakes caught by the DMA debugger. The first change
fixes a unnecessary unmap that should have been removed in an
earlier update. The next hunk fixes another bad unmap by zeroing
the bit checked to determine that an unmap is needed. The final
change fixes some buffers that are unmapped with the wrong
direction specified.

Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Falcon 2018-04-06 18:37:02 -05:00 committed by David S. Miller
parent e41f054847
commit 37e40fa8f6
1 changed files with 6 additions and 8 deletions
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14
drivers/net/ethernet/ibm/ibmvnic.c
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@ -320,9 +320,6 @@ static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
dev_info(dev, "replenish pools failure\n");
pool->free_map[pool->next_free] = index;
pool->rx_buff[index].skb = NULL;
if (!dma_mapping_error(dev, dma_addr))
dma_unmap_single(dev, dma_addr, pool->buff_size,
DMA_FROM_DEVICE);
dev_kfree_skb_any(skb);
adapter->replenish_add_buff_failure++;
@ -2574,7 +2571,7 @@ static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
union sub_crq *next;
int index;
int i, j;
u8 first;
u8 *first;
restart_loop:
while (pending_scrq(adapter, scrq)) {
@ -2605,11 +2602,12 @@ static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
txbuff->data_dma[j] = 0;
}
/* if sub_crq was sent indirectly */
first = txbuff->indir_arr[0].generic.first;
if (first == IBMVNIC_CRQ_CMD) {
first = &txbuff->indir_arr[0].generic.first;
if (*first == IBMVNIC_CRQ_CMD) {
dma_unmap_single(dev, txbuff->indir_dma,
sizeof(txbuff->indir_arr),
DMA_TO_DEVICE);
*first = 0;
}
if (txbuff->last_frag) {
@ -3882,9 +3880,9 @@ static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
int i;
dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
DMA_BIDIRECTIONAL);
DMA_TO_DEVICE);
dma_unmap_single(dev, adapter->login_rsp_buf_token,
adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
/* If the number of queues requested can't be allocated by the
* server, the login response will return with code 1. We will need