net: irda: avoid null pointer dereference

Only dereference variable self after checking it is not NULL.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/irda/nsc-ircc.c b/drivers/net/irda/nsc-ircc.c
index 9ef13d8ed813f243511c9a11993dc73f7989b075..aaecc3baaf309ed54683d9b5e93511400d5acff3 100644 (file)
--- a/drivers/net/irda/nsc-ircc.c
+++ b/drivers/net/irda/nsc-ircc.c
@@ -1253,7 +1253,7 @@ static void nsc_ircc_change_dongle_speed(int iobase, int speed, int dongle_id)
  */
 static __u8 nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 speed)
 {
-       struct net_device *dev = self->netdev;
+       struct net_device *dev;
        __u8 mcr = MCR_SIR;
        int iobase; 
        __u8 bank;
@@ -1263,6 +1263,7 @@ static __u8 nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 speed)
 
        IRDA_ASSERT(self != NULL, return 0;);
 
+       dev = self->netdev;
        iobase = self->io.fir_base;
 
        /* Update accounting for new speed */