V4L/DVB (7922): tuner-simple: fix tuner_warn() induced kernel oops in…

… simple_tuner_attach()

The tuner_warn() macro relies on the local variable "priv" to be a valid
pointer.  There was a case in simple_tuner_attach() where this cannot be the
case yet, so tuner_warn() would dereference a NULL "priv" pointer.  Changed
the tuner_warn() to a printk() with the originally intended output format.

Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/common/tuners/tuner-simple.c

@@ -1018,8 +1018,10 @@ struct dvb_frontend *simple_tuner_attach(struct dvb_frontend *fe,
 			fe->ops.i2c_gate_ctrl(fe, 1);
 
 		if (1 != i2c_transfer(i2c_adap, &msg, 1))
-			tuner_warn("unable to probe %s, proceeding anyway.",
-				   tuners[type].name);
+			printk(KERN_WARNING "tuner-simple %d-%04x: "
+			       "unable to probe %s, proceeding anyway.",
+			       i2c_adapter_id(i2c_adap), i2c_addr,
+			       tuners[type].name);
 
 		if (fe->ops.i2c_gate_ctrl)
 			fe->ops.i2c_gate_ctrl(fe, 0);