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[POWERPC] Avoid NULL pointer in gpio1_interrupt 

gpio1_interrupt() may dereference a NULL pointer if ioremap() fails.
But, maybe no gpio interrupt happens in the first place?

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Olaf Hering 2006-09-26 22:28:36 +02:00 committed by Paul Mackerras
parent a8ed4f7ec3
commit 61e37ca22b
1 changed files with 6 additions and 1 deletions
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7
drivers/macintosh/via-pmu.c
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@ -336,8 +336,10 @@ int __init find_via_pmu(void)
if (gaddr != OF_BAD_ADDR)
gpio_reg = ioremap(gaddr, 0x10);
}
if (gpio_reg == NULL)
if (gpio_reg == NULL) {
printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
goto fail_gpio;
}
} else
pmu_kind = PMU_UNKNOWN;
@ -365,6 +367,9 @@ int __init find_via_pmu(void)
return 1;
fail:
of_node_put(vias);
iounmap(gpio_reg);
gpio_reg = NULL;
fail_gpio:
vias = NULL;
return 0;
}