[v1] misc: cb710: core:- Handle return NULL error from pcim_iomap_table

[Arvind Yadav]

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/misc/cb710/core.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/misc/cb710/core.c b/drivers/misc/cb710/core.c
index fb397e7..7b60019 100644
--- a/drivers/misc/cb710/core.c
+++ b/drivers/misc/cb710/core.c
@@ -248,6 +248,8 @@ static int cb710_probe(struct pci_dev *pdev,
        spin_lock_init(&chip->irq_lock);
        chip->pdev = pdev;
        chip->iobase = pcim_iomap_table(pdev)[0];
+       if (!chip->iobase)
+               return -ENOMEM;
 
        pci_set_drvdata(pdev, chip);
 
-- 
1.7.9.5