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authorJean Delvare <khali@linux-fr.org>2010-05-27 19:58:37 +0200
committerJean Delvare <khali@linux-fr.org>2010-05-27 19:58:37 +0200
commit70dd6beac02f43a5099fcf5fddf68cfee0cbf479 (patch)
tree53d70a87157eafdf62612922a137fcc365439688 /drivers/acpi
parent31f46717997a83bdf6db0dd04810c0a329eb3148 (diff)
downloadlinux-70dd6beac02f43a5099fcf5fddf68cfee0cbf479.tar.bz2
hwmon: (asus_atk0110) Don't load if ACPI resources aren't enforced
When the user passes the kernel parameter acpi_enforce_resources=lax, the ACPI resources are no longer protected, so a native driver can make use of them. In that case, we do not want the asus_atk0110 to be loaded. Unfortunately, this driver loads automatically due to its MODULE_DEVICE_TABLE, so the user ends up with two drivers loaded for the same device - this is bad. So I suggest that we prevent the asus_atk0110 driver from loading if acpi_enforce_resources=lax. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Luca Tettamanti <kronos.it@gmail.com> Cc: Len Brown <lenb@kernel.org>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/osl.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 4bc1c4178f50..78418ce4fc78 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -1207,6 +1207,15 @@ int acpi_check_mem_region(resource_size_t start, resource_size_t n,
EXPORT_SYMBOL(acpi_check_mem_region);
/*
+ * Let drivers know whether the resource checks are effective
+ */
+int acpi_resources_are_enforced(void)
+{
+ return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
+}
+EXPORT_SYMBOL(acpi_resources_are_enforced);
+
+/*
* Acquire a spinlock.
*
* handle is a pointer to the spinlock_t.