Re: [v1] mmc: host: dw_mmc-pci:- Handle return NULL error from pcim_iomap_table

[arvind Yadav]

Ignore this change. Sorry for noise.

Thanks
-Arvind

On Thursday 22 December 2016 05:36 PM, Arvind Yadav wrote:

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 <arvind.yadav...@gmail.com>
---
  drivers/mmc/host/dw_mmc-pci.c |    2 ++
  1 file changed, 2 insertions(+)

diff --git a/drivers/mmc/host/dw_mmc-pci.c b/drivers/mmc/host/dw_mmc-pci.c
index ab82796..f42d302 100644
--- a/drivers/mmc/host/dw_mmc-pci.c
+++ b/drivers/mmc/host/dw_mmc-pci.c
@@ -61,6 +61,8 @@ static int dw_mci_pci_probe(struct pci_dev *pdev,
                return ret;

host->regs = pcim_iomap_table(pdev)[PCI_BAR_NO];

+       if (!host->regs)
+               return -ENOMEM;

pci_set_master(pdev);