FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2024-12-18 06:50:08 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

hwmon: (lm78) Fix I/O resource conflict with PNP

Browse Source 
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 make the request
(and thus the detection) fail.

This is the exact same fix that was applied to driver w83781d in
March 2008 to address the same problem:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2961cb22ef02850d90e7a12c28a14d74e327df8d

Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Jean Delvare 2008-10-17 17:51:15 +02:00 committed by Jean Delvare
parent f908037a01
commit 47c15532dd
1 changed files with 15 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/hwmon/lm78.c
View File

@ -655,7 +655,7 @@ static int __devinit lm78_isa_probe(struct platform_device *pdev)
/* Reserve the ISA region */
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!request_region(res->start, LM78_EXTENT, "lm78")) {
if (!request_region(res->start + LM78_ADDR_REG_OFFSET, 2, "lm78")) {
err = -EBUSY;
goto exit;
}
@ -699,7 +699,7 @@ static int __devinit lm78_isa_probe(struct platform_device *pdev)
device_remove_file(&pdev->dev, &dev_attr_name);
kfree(data);
exit_release_region:
release_region(res->start, LM78_EXTENT);
release_region(res->start + LM78_ADDR_REG_OFFSET, 2);
exit:
return err;
}
@ -711,7 +711,7 @@ static int __devexit lm78_isa_remove(struct platform_device *pdev)
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&pdev->dev.kobj, &lm78_group);
device_remove_file(&pdev->dev, &dev_attr_name);
release_region(data->client.addr, LM78_EXTENT);
release_region(data->client.addr + LM78_ADDR_REG_OFFSET, 2);
kfree(data);
return 0;
@ -837,8 +837,17 @@ static int __init lm78_isa_found(unsigned short address)
{
int val, save, found = 0;
if (!request_region(address, LM78_EXTENT, "lm78"))
/* 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, "lm78")) {
pr_debug("lm78: Failed to request low part of region\n");
return 0;
}
if (!request_region(address + 4, 4, "lm78")) {
pr_debug("lm78: 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 LM78-like
@ -901,7 +910,8 @@ static int __init lm78_isa_found(unsigned short address)
val & 0x80 ? "LM79" : "LM78", (int)address);
release:
release_region(address, LM78_EXTENT);
release_region(address + 4, 4);
release_region(address, 4);
return found;
}