staging: slicoss: Add error check for pci_map_single

Currently, DMA mapping failure is not detected, causing the hardware
to attempt a DMA from an invalid address.

This patch adds the corresponding error check for pci_map_single i.e.
pci_dma_mapping_error.

Problem found using the following Coccinelle semantic patch:
// <smpl>
@@
expression e1;
identifier x;
@@
 x=
(
*dma_map_single(...)
|
*dma_map_page(...)
)
... when != dma_mapping_error(e1,x)
@@
expression e1;
identifier x;
@@

 x =
(
*pci_map_single(...)
|
*pci_map_page(...)
)
 ... when != pci_dma_mapping_error(e1,x)
// </smpl>

Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Amitoj Kaur Chawla 2016-03-12 15:01:04 +05:30 коммит произвёл Greg Kroah-Hartman
Родитель afb105549d
Коммит 514dd88df7
1 изменённых файлов: 5 добавлений и 0 удалений

Просмотреть файл

@ -1855,6 +1855,11 @@ static void slic_xmit_build_request(struct adapter *adapter,
ihcmd->u.slic_buffers.totlen = skb->len;
phys_addr = pci_map_single(adapter->pcidev, skb->data, skb->len,
PCI_DMA_TODEVICE);
if (pci_dma_mapping_error(adapter->pcidev, phys_addr)) {
kfree_skb(skb);
dev_err(&adapter->pcidev->dev, "DMA mapping error\n");
return;
}
ihcmd->u.slic_buffers.bufs[0].paddrl = SLIC_GET_ADDR_LOW(phys_addr);
ihcmd->u.slic_buffers.bufs[0].paddrh = SLIC_GET_ADDR_HIGH(phys_addr);
ihcmd->u.slic_buffers.bufs[0].length = skb->len;