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authorJean Delvare <khali@linux-fr.org>2008-03-09 13:34:28 +0100
committerMark M. Hoffman <mhoffman@lightlink.com>2008-03-27 08:40:41 -0400
commit2961cb22ef02850d90e7a12c28a14d74e327df8d (patch)
treebffcd9538506c0b031c082d2b0ebc8a1c608b7fc /drivers/hwmon/w83781d.c
parent05dda977f2574c3341abef9b74c27d2b362e1e3a (diff)
downloadlinux-2961cb22ef02850d90e7a12c28a14d74e327df8d.tar.bz2
hwmon: (w83781d) Fix I/O resource conflict with PNP
Only request I/O ports 0x295-0x296 instead of the full I/O address range. This solves a conflict with PNP resources on a few motherboards. Also request the I/O ports in two parts (4 low ports, 4 high ports) during device detection, otherwise the PNP resource makes the request (and thus the detection) fail. This fixes lm-sensors ticket #2306: http://www.lm-sensors.org/ticket/2306 Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
Diffstat (limited to 'drivers/hwmon/w83781d.c')
-rw-r--r--drivers/hwmon/w83781d.c21
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c
index 5c85670e2d16..f942ecdd47c8 100644
--- a/drivers/hwmon/w83781d.c
+++ b/drivers/hwmon/w83781d.c
@@ -1367,7 +1367,8 @@ w83781d_isa_probe(struct platform_device *pdev)
/* Reserve the ISA region */
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
- if (!request_region(res->start, W83781D_EXTENT, "w83781d")) {
+ if (!request_region(res->start + W83781D_ADDR_REG_OFFSET, 2,
+ "w83781d")) {
err = -EBUSY;
goto exit;
}
@@ -1415,7 +1416,7 @@ w83781d_isa_probe(struct platform_device *pdev)
device_remove_file(&pdev->dev, &dev_attr_name);
kfree(data);
exit_release_region:
- release_region(res->start, W83781D_EXTENT);
+ release_region(res->start + W83781D_ADDR_REG_OFFSET, 2);
exit:
return err;
}
@@ -1429,7 +1430,7 @@ w83781d_isa_remove(struct platform_device *pdev)
sysfs_remove_group(&pdev->dev.kobj, &w83781d_group);
sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt);
device_remove_file(&pdev->dev, &dev_attr_name);
- release_region(data->client.addr, W83781D_EXTENT);
+ release_region(data->client.addr + W83781D_ADDR_REG_OFFSET, 2);
kfree(data);
return 0;
@@ -1797,8 +1798,17 @@ w83781d_isa_found(unsigned short address)
{
int val, save, found = 0;
- if (!request_region(address, W83781D_EXTENT, "w83781d"))
+ /* We have to request the region in two parts because some
+ boards declare base+4 to base+7 as a PNP device */
+ if (!request_region(address, 4, "w83781d")) {
+ pr_debug("w83781d: Failed to request low part of region\n");
return 0;
+ }
+ if (!request_region(address + 4, 4, "w83781d")) {
+ pr_debug("w83781d: Failed to request high part of region\n");
+ release_region(address, 4);
+ return 0;
+ }
#define REALLY_SLOW_IO
/* We need the timeouts for at least some W83781D-like
@@ -1871,7 +1881,8 @@ w83781d_isa_found(unsigned short address)
val == 0x30 ? "W83782D" : "W83781D", (int)address);
release:
- release_region(address, W83781D_EXTENT);
+ release_region(address + 4, 4);
+ release_region(address, 4);
return found;
}