From e1612de9e4cdf375c3cf1c72434ab8abdcb3927e Mon Sep 17 00:00:00 2001 From: Haren Myneni Date: Wed, 11 Jul 2012 15:18:44 +1000 Subject: powerpc: Disable /dev/port interface on systems without an ISA bridge Some power systems do not have legacy ISA devices. So, /dev/port is not a valid interface on these systems. User level tools such as kbdrate is trying to access the device using this interface which is causing the system crash. This patch will fix this issue by not creating this interface on these powerpc systems. Signed-off-by: Haren Myneni Signed-off-by: Benjamin Herrenschmidt --- drivers/char/mem.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) (limited to 'drivers/char') diff --git a/drivers/char/mem.c b/drivers/char/mem.c index 67c3371723cc..e5eedfa24c91 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -27,14 +27,16 @@ #include #include #include +#include #include -#include #ifdef CONFIG_IA64 # include #endif +#define DEVPORT_MINOR 4 + static inline unsigned long size_inside_page(unsigned long start, unsigned long size) { @@ -894,6 +896,13 @@ static int __init chr_dev_init(void) for (minor = 1; minor < ARRAY_SIZE(devlist); minor++) { if (!devlist[minor].name) continue; + + /* + * Create /dev/port? + */ + if ((minor == DEVPORT_MINOR) && !arch_has_dev_port()) + continue; + device_create(mem_class, NULL, MKDEV(MEM_MAJOR, minor), NULL, devlist[minor].name); } -- cgit v1.2.2