via-ircc: don't return zero if via_ircc_open() failed

If via_ircc_open() fails, data structures of the driver left uninitialized,
but probe (via_init_one()) returns zero. That can lead to null pointer dereference
in via_remove_one(), since it does not check drvdata for NULL.

The patch implements proper error code propagation.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/net/irda/via-ircc.c b/drivers/net/irda/via-ircc.c
index 51f2bc376101..2dcc60fb37f1 100644
--- a/drivers/net/irda/via-ircc.c
+++ b/drivers/net/irda/via-ircc.c
@@ -210,8 +210,7 @@ static int via_init_one(struct pci_dev *pcidev, const struct pci_device_id *id)
                         pci_write_config_byte(pcidev,0x42,(bTmp | 0xf0));
                         pci_write_config_byte(pcidev,0x5a,0xc0);
                         WriteLPCReg(0x28, 0x70 );
-                        if (via_ircc_open(pcidev, &info, 0x3076) == 0)
-                                rc=0;
+                        rc = via_ircc_open(pcidev, &info, 0x3076);
                 } else
                         rc = -ENODEV; //IR not turn on   
         } else { //Not VT1211
@@ -249,8 +248,7 @@ static int via_init_one(struct pci_dev *pcidev, const struct pci_device_id *id)
                         info.irq=FirIRQ;
                         info.dma=FirDRQ1;
                         info.dma2=FirDRQ0;
-                        if (via_ircc_open(pcidev, &info, 0x3096) == 0)
-                                rc=0;
+                        rc = via_ircc_open(pcidev, &info, 0x3096);
                 } else
                         rc = -ENODEV; //IR not turn on !!!!!
         }//Not VT1211