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authorMaciej W. Rozycki <macro@linux-mips.org>2008-02-07 00:15:08 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 08:42:24 -0800
commit0ba137e23e8d8f5cb15778b44be281c5687afc49 (patch)
tree0ee61cee68b30e114b121967ac523e288417a56d
parentdbab81281d3227af3d8a04aa748c5f41befa5d43 (diff)
dz: don't panic() when request_irq() fails
Well, panic() is a little bit undue if request_irq() fails; there is probably no need to justify it any further. Handle the case gracefully, by unregistering the driver. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/serial/dz.c20
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/serial/dz.c b/drivers/serial/dz.c
index e1a2e413eb7d..fb6f27302935 100644
--- a/drivers/serial/dz.c
+++ b/drivers/serial/dz.c
@@ -794,18 +794,28 @@ static int __init dz_init(void)
dz_reset(&dz_ports[0]);
#endif
- if (request_irq(dz_ports[0].port.irq, dz_interrupt,
- IRQF_DISABLED, "DZ", &dz_ports[0]))
- panic("Unable to register DZ interrupt");
-
ret = uart_register_driver(&dz_reg);
if (ret != 0)
- return ret;
+ goto out;
+
+ ret = request_irq(dz_ports[0].port.irq, dz_interrupt, IRQF_DISABLED,
+ "DZ", &dz_ports[0]);
+ if (ret != 0) {
+ printk(KERN_ERR "dz: Cannot get IRQ %d!\n",
+ dz_ports[0].port.irq);
+ goto out_unregister;
+ }
for (i = 0; i < DZ_NB_PORT; i++)
uart_add_one_port(&dz_reg, &dz_ports[i].port);
return ret;
+
+out_unregister:
+ uart_unregister_driver(&dz_reg);
+
+out:
+ return ret;
}
module_init(dz_init);