Here, If pcim_iomap_table will fail. It will return NULL. Kernel can run into a NULL-pointer dereference. This error check will avoid NULL pointer dereference.
Signed-off-by: Arvind Yadav <[email protected]> --- drivers/i2c/busses/i2c-designware-pcidrv.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c index d6423cf..6a1907d 100644 --- a/drivers/i2c/busses/i2c-designware-pcidrv.c +++ b/drivers/i2c/busses/i2c-designware-pcidrv.c @@ -235,6 +235,10 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev, dev->controller = controller; dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz; dev->base = pcim_iomap_table(pdev)[0]; + if (!dev->base) { + dev_err(&pdev->dev, "I/O map table allocation failed\n"); + return -ENOMEM; + } dev->dev = &pdev->dev; dev->irq = pdev->irq; -- 1.7.9.5
