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| author | Jia-Ju Bai <baijiaju1990@gmail.com> | 2022-03-05 11:58:16 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-16 16:15:57 +0300 |
| commit | 33c74f8085961308249c2d27097bb6d393305cbc (patch) | |
| tree | 98e5eebdc2bc8432ccb6f8f22086c81d25eae7f0 /drivers/isdn | |
| parent | cca9d5035bd055a8824ae9e8e1e144eb22ae4b0b (diff) | |
| download | linux-33c74f8085961308249c2d27097bb6d393305cbc.tar.xz | |
isdn: hfcpci: check the return value of dma_set_mask() in setup_hw()
[ Upstream commit d0aeb0d4a3f7d2a0df7e9545892bbeede8f2ac7e ]
The function dma_set_mask() in setup_hw() can fail, so its return value
should be checked.
Fixes: 1700fe1a10dc ("Add mISDN HFC PCI driver")
Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/isdn')
| -rw-r--r-- | drivers/isdn/hardware/mISDN/hfcpci.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/isdn/hardware/mISDN/hfcpci.c b/drivers/isdn/hardware/mISDN/hfcpci.c index bd087cca1c1d..af17459c1a5c 100644 --- a/drivers/isdn/hardware/mISDN/hfcpci.c +++ b/drivers/isdn/hardware/mISDN/hfcpci.c @@ -2005,7 +2005,11 @@ setup_hw(struct hfc_pci *hc) } /* Allocate memory for FIFOS */ /* the memory needs to be on a 32k boundary within the first 4G */ - dma_set_mask(&hc->pdev->dev, 0xFFFF8000); + if (dma_set_mask(&hc->pdev->dev, 0xFFFF8000)) { + printk(KERN_WARNING + "HFC-PCI: No usable DMA configuration!\n"); + return -EIO; + } buffer = dma_alloc_coherent(&hc->pdev->dev, 0x8000, &hc->hw.dmahandle, GFP_KERNEL); /* We silently assume the address is okay if nonzero */ |