提交 96ebbe8d 编写于 作者: S Stanislaw Gruszka 提交者: John W. Linville

iwlegacy: check for dma mapping errors

Handle pci_map_page() errors. This fixes "DMA-API: device driver failed
to check map error" warning.
Reported-by: NZdenek Kabelac <zkabelac@redhat.com>
Signed-off-by: NStanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
上级 58b27101
......@@ -1001,12 +1001,12 @@ il3945_rx_allocate(struct il_priv *il, gfp_t priority)
struct list_head *element;
struct il_rx_buf *rxb;
struct page *page;
dma_addr_t page_dma;
unsigned long flags;
gfp_t gfp_mask = priority;
while (1) {
spin_lock_irqsave(&rxq->lock, flags);
if (list_empty(&rxq->rx_used)) {
spin_unlock_irqrestore(&rxq->lock, flags);
return;
......@@ -1035,26 +1035,34 @@ il3945_rx_allocate(struct il_priv *il, gfp_t priority)
break;
}
/* Get physical address of RB/SKB */
page_dma =
pci_map_page(il->pci_dev, page, 0,
PAGE_SIZE << il->hw_params.rx_page_order,
PCI_DMA_FROMDEVICE);
if (unlikely(pci_dma_mapping_error(il->pci_dev, page_dma))) {
__free_pages(page, il->hw_params.rx_page_order);
break;
}
spin_lock_irqsave(&rxq->lock, flags);
if (list_empty(&rxq->rx_used)) {
spin_unlock_irqrestore(&rxq->lock, flags);
pci_unmap_page(il->pci_dev, page_dma,
PAGE_SIZE << il->hw_params.rx_page_order,
PCI_DMA_FROMDEVICE);
__free_pages(page, il->hw_params.rx_page_order);
return;
}
element = rxq->rx_used.next;
rxb = list_entry(element, struct il_rx_buf, list);
list_del(element);
spin_unlock_irqrestore(&rxq->lock, flags);
rxb->page = page;
/* Get physical address of RB/SKB */
rxb->page_dma =
pci_map_page(il->pci_dev, page, 0,
PAGE_SIZE << il->hw_params.rx_page_order,
PCI_DMA_FROMDEVICE);
spin_lock_irqsave(&rxq->lock, flags);
rxb->page_dma = page_dma;
list_add_tail(&rxb->list, &rxq->rx_free);
rxq->free_count++;
il->alloc_rxb_page++;
......@@ -1284,8 +1292,15 @@ il3945_rx_handle(struct il_priv *il)
pci_map_page(il->pci_dev, rxb->page, 0,
PAGE_SIZE << il->hw_params.
rx_page_order, PCI_DMA_FROMDEVICE);
list_add_tail(&rxb->list, &rxq->rx_free);
rxq->free_count++;
if (unlikely(pci_dma_mapping_error(il->pci_dev,
rxb->page_dma))) {
__il_free_pages(il, rxb->page);
rxb->page = NULL;
list_add_tail(&rxb->list, &rxq->rx_used);
} else {
list_add_tail(&rxb->list, &rxq->rx_free);
rxq->free_count++;
}
} else
list_add_tail(&rxb->list, &rxq->rx_used);
......
......@@ -319,6 +319,7 @@ il4965_rx_allocate(struct il_priv *il, gfp_t priority)
struct list_head *element;
struct il_rx_buf *rxb;
struct page *page;
dma_addr_t page_dma;
unsigned long flags;
gfp_t gfp_mask = priority;
......@@ -356,33 +357,35 @@ il4965_rx_allocate(struct il_priv *il, gfp_t priority)
return;
}
/* Get physical address of the RB */
page_dma =
pci_map_page(il->pci_dev, page, 0,
PAGE_SIZE << il->hw_params.rx_page_order,
PCI_DMA_FROMDEVICE);
if (unlikely(pci_dma_mapping_error(il->pci_dev, page_dma))) {
__free_pages(page, il->hw_params.rx_page_order);
break;
}
spin_lock_irqsave(&rxq->lock, flags);
if (list_empty(&rxq->rx_used)) {
spin_unlock_irqrestore(&rxq->lock, flags);
pci_unmap_page(il->pci_dev, page_dma,
PAGE_SIZE << il->hw_params.rx_page_order,
PCI_DMA_FROMDEVICE);
__free_pages(page, il->hw_params.rx_page_order);
return;
}
element = rxq->rx_used.next;
rxb = list_entry(element, struct il_rx_buf, list);
list_del(element);
spin_unlock_irqrestore(&rxq->lock, flags);
BUG_ON(rxb->page);
rxb->page = page;
/* Get physical address of the RB */
rxb->page_dma =
pci_map_page(il->pci_dev, page, 0,
PAGE_SIZE << il->hw_params.rx_page_order,
PCI_DMA_FROMDEVICE);
/* dma address must be no more than 36 bits */
BUG_ON(rxb->page_dma & ~DMA_BIT_MASK(36));
/* and also 256 byte aligned! */
BUG_ON(rxb->page_dma & DMA_BIT_MASK(8));
spin_lock_irqsave(&rxq->lock, flags);
rxb->page = page;
rxb->page_dma = page_dma;
list_add_tail(&rxb->list, &rxq->rx_free);
rxq->free_count++;
il->alloc_rxb_page++;
......@@ -4292,8 +4295,16 @@ il4965_rx_handle(struct il_priv *il)
pci_map_page(il->pci_dev, rxb->page, 0,
PAGE_SIZE << il->hw_params.
rx_page_order, PCI_DMA_FROMDEVICE);
list_add_tail(&rxb->list, &rxq->rx_free);
rxq->free_count++;
if (unlikely(pci_dma_mapping_error(il->pci_dev,
rxb->page_dma))) {
__il_free_pages(il, rxb->page);
rxb->page = NULL;
list_add_tail(&rxb->list, &rxq->rx_used);
} else {
list_add_tail(&rxb->list, &rxq->rx_free);
rxq->free_count++;
}
} else
list_add_tail(&rxb->list, &rxq->rx_used);
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册