Re: [PATCH 2/5] Provide acpi_check_{mem_}region.

Andrew Morton
2008-02-08T07:41:01Z

On Wed, 24 Oct 2007 16:32:59 +0200 Thomas Renninger <trenn@suse.de> wrote:

> Provide acpi_check_{mem_}region.
>
> Drivers can additionally check against possible ACPI interference by also
> invoking this shortly before they call request_region.
> If -EBUSY is returned, the driver must not load.
> Use acpi_enforce_resources=strict/lax/no options to:
> - strict: let conflicting drivers fail to load with an error message
> - lax: let conflicting driver work normal with a warning message
> - no: no functional change at all
>
>

OK, so Len has merged these into the acpi test tree. My understanding is
that once this work hits mainline, we can then merge
check-for-acpi-resource-conflicts-in-hwmon-drivers.patch.

My normal approach would be to send
check-for-acpi-resource-conflicts-in-hwmon-drivers.patch to Mark for
inclusion in git-hwmon one Len has merged the prerequisites into mainline.

Problem is, if Len merges late in the 2.6.26 merge window, Mark might not
have time to gets these changes into mainline before 2.6.27. Which is all
getting a bit dumb considering I first merged everything in October.
Fortunately things aren't mormally _this_ inefficient when one follows the
rules - this was an unusual patchset.

But still, I think we could afford to speed things up a bit more than that.
We could ask Len to consider merging this work into 2.6.25 and then if
Mark can ack check-for-acpi-resource-conflicts-in-hwmon-drivers.patch
(below) for an akpm-merge, we're good to go. But I do recall that people
were a bit uncertain about it all back in October.

Please share your thoughts with us.

From: Jean Delvare <jdelvare@suse.de>

Check for ACPI resource conflicts in hwmon drivers. I've included
all Super-I/O and PCI drivers.

I've voluntarily left out:
* Laptop specific and vendor-specific drivers: if they conflicted
on any system, this would pretty much mean that they conflict on all
systems, and we would know by now.
* Legacy ISA drivers (lm78 and w83781d): they only support chips found
on old designs were ACPI either wasn't supported or didn't deal with
thermal management.
* Drivers accessing the I/O resources indirectly (e.g. through SMBus):
the check will be added where it belongs, i.e. in the bus drivers.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Thomas Renninger <trenn@suse.de>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

drivers/hwmon/dme1737.c | 5 +++++
drivers/hwmon/f71805f.c | 5 +++++
drivers/hwmon/f71882fg.c | 5 +++++
drivers/hwmon/it87.c | 5 +++++
drivers/hwmon/pc87360.c | 6 ++++++
drivers/hwmon/pc87427.c | 5 +++++
drivers/hwmon/sis5595.c | 5 +++++
drivers/hwmon/smsc47b397.c | 5 +++++
drivers/hwmon/smsc47m1.c | 5 +++++
drivers/hwmon/via686a.c | 5 +++++
drivers/hwmon/vt1211.c | 5 +++++
drivers/hwmon/vt8231.c | 5 +++++
drivers/hwmon/w83627ehf.c | 6 ++++++
drivers/hwmon/w83627hf.c | 5 +++++
14 files changed, 72 insertions(+)

diff -puN drivers/hwmon/dme1737.c~check-for-acpi-resource-conflicts-in-hwmon-drivers drivers/hwmon/dme1737.c
--- a/drivers/hwmon/dme1737.c~check-for-acpi-resource-conflicts-in-hwmon-drivers
+++ a/drivers/hwmon/dme1737.c
@@ -34,6 +34,7 @@
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
+#include <linux/acpi.h>
#include <asm/io.h>

/* ISA device, if found */
@@ -2238,6 +2239,10 @@ static int __init dme1737_isa_device_add
};
int err;

+ err = acpi_check_resource_conflict(&res);
+ if (err)
+ goto exit;
+
if (!(pdev = platform_device_alloc("dme1737", addr))) {
printk(KERN_ERR "dme1737: Failed to allocate device.\n");
err = -ENOMEM;
diff -puN drivers/hwmon/f71805f.c~check-for-acpi-resource-conflicts-in-hwmon-drivers drivers/hwmon/f71805f.c
--- a/drivers/hwmon/f71805f.c~check-for-acpi-resource-conflicts-in-hwmon-drivers
+++ a/drivers/hwmon/f71805f.c
@@ -39,6 +39,7 @@
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/ioport.h>
+#include <linux/acpi.h>
#include <asm/io.h>

static unsigned short force_id;
@@ -1455,6 +1456,10 @@ static int __init f71805f_device_add(uns
}

res.name = pdev->name;
+ err = acpi_check_resource_conflict(&res);
+ if (err)
+ goto exit_device_put;
+
err = platform_device_add_resources(pdev, &res, 1);
if (err) {
printk(KERN_ERR DRVNAME ": Device resource addition failed "
diff -puN drivers/hwmon/f71882fg.c~check-for-acpi-resource-conflicts-in-hwmon-drivers drivers/hwmon/f71882fg.c
--- a/drivers/hwmon/f71882fg.c~check-for-acpi-resource-conflicts-in-hwmon-drivers
+++ a/drivers/hwmon/f71882fg.c
@@ -27,6 +27,7 @@
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
+#include <linux/acpi.h>
#include <asm/io.h>

#define DRVNAME "f71882fg"
@@ -898,6 +899,10 @@ static int __init f71882fg_device_add(un
return -ENOMEM;

res.name = f71882fg_pdev->name;
+ err = acpi_check_resource_conflict(&res);
+ if (err)
+ return err;
+
err = platform_device_add_resources(f71882fg_pdev, &res, 1);
if (err) {
printk(KERN_ERR DRVNAME ": Device resource addition failed\n");
diff -puN drivers/hwmon/it87.c~check-for-acpi-resource-conflicts-in-hwmon-drivers drivers/hwmon/it87.c
--- a/drivers/hwmon/it87.c~check-for-acpi-resource-conflicts-in-hwmon-drivers
+++ a/drivers/hwmon/it87.c
@@ -46,6 +46,7 @@
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
+#include <linux/acpi.h>
#include <asm/io.h>

#define DRVNAME "it87"
@@ -1487,6 +1488,10 @@ static int __init it87_device_add(unsign
};
int err;

+ err = acpi_check_resource_conflict(&res);
+ if (err)
+ goto exit;
+
pdev = platform_device_alloc(DRVNAME, address);
if (!pdev) {
err = -ENOMEM;
diff -puN drivers/hwmon/pc87360.c~check-for-acpi-resource-conflicts-in-hwmon-drivers drivers/hwmon/pc87360.c
--- a/drivers/hwmon/pc87360.c~check-for-acpi-resource-conflicts-in-hwmon-drivers
+++ a/drivers/hwmon/pc87360.c
@@ -43,6 +43,7 @@
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
+#include <linux/acpi.h>
#include <asm/io.h>

static u8 devid;
@@ -1425,6 +1426,11 @@ static int __init pc87360_device_add(uns
continue;
res.start = extra_isa[i];
res.end = extra_isa[i] + PC87360_EXTENT - 1;
+
+ err = acpi_check_resource_conflict(&res);
+ if (err)
+ goto exit_device_put;
+
err = platform_device_add_resources(pdev, &res, 1);
if (err) {
printk(KERN_ERR "pc87360: Device resource[%d] "
diff -puN drivers/hwmon/pc87427.c~check-for-acpi-resource-conflicts-in-hwmon-drivers drivers/hwmon/pc87427.c
--- a/drivers/hwmon/pc87427.c~check-for-acpi-resource-conflicts-in-hwmon-drivers
+++ a/drivers/hwmon/pc87427.c
@@ -32,6 +32,7 @@
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/ioport.h>
+#include <linux/acpi.h>
#include <asm/io.h>

static unsigned short force_id;
@@ -524,6 +525,10 @@ static int __init pc87427_device_add(uns
};
int err;

+ err = acpi_check_resource_conflict(&res);
+ if (err)
+ goto exit;
+
pdev = platform_device_alloc(DRVNAME, address);
if (!pdev) {
err = -ENOMEM;
diff -puN drivers/hwmon/sis5595.c~check-for-acpi-resource-conflicts-in-hwmon-drivers drivers/hwmon/sis5595.c
--- a/drivers/hwmon/sis5595.c~check-for-acpi-resource-conflicts-in-hwmon-drivers
+++ a/drivers/hwmon/sis5595.c
@@ -62,6 +62,7 @@
#include <linux/jiffies.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
+#include <linux/acpi.h>
#include <asm/io.h>

@@ -727,6 +728,10 @@ static int __devinit sis5595_device_add(
};
int err;

+ err = acpi_check_resource_conflict(&res);
+ if (err)
+ goto exit;
+
pdev = platform_device_alloc("sis5595", address);
if (!pdev) {
err = -ENOMEM;
diff -puN drivers/hwmon/smsc47b397.c~check-for-acpi-resource-conflicts-in-hwmon-drivers drivers/hwmon/smsc47b397.c
--- a/drivers/hwmon/smsc47b397.c~check-for-acpi-resource-conflicts-in-hwmon-drivers
+++ a/drivers/hwmon/smsc47b397.c
@@ -36,6 +36,7 @@
#include <linux/err.h>
#include <linux/init.h>
#include <linux/mutex.h>
+#include <linux/acpi.h>
#include <asm/io.h>

static unsigned short force_id;
@@ -303,6 +304,10 @@ static int __init smsc47b397_device_add(
};
int err;

+ err = acpi_check_resource_conflict(&res);
+ if (err)
+ goto exit;
+
pdev = platform_device_alloc(DRVNAME, address);
if (!pdev) {
err = -ENOMEM;
diff -puN drivers/hwmon/smsc47m1.c~check-for-acpi-resource-conflicts-in-hwmon-drivers drivers/hwmon/smsc47m1.c
--- a/drivers/hwmon/smsc47m1.c~check-for-acpi-resource-conflicts-in-hwmon-drivers
+++ a/drivers/hwmon/smsc47m1.c
@@ -37,6 +37,7 @@
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
+#include <linux/acpi.h>
#include <asm/io.h>

static unsigned short force_id;
@@ -686,6 +687,10 @@ static int __init smsc47m1_device_add(un
};
int err;

+ err = acpi_check_resource_conflict(&res);
+ if (err)
+ goto exit;
+
pdev = platform_device_alloc(DRVNAME, address);
if (!pdev) {
err = -ENOMEM;
diff -puN drivers/hwmon/via686a.c~check-for-acpi-resource-conflicts-in-hwmon-drivers drivers/hwmon/via686a.c
--- a/drivers/hwmon/via686a.c~check-for-acpi-resource-conflicts-in-hwmon-drivers
+++ a/drivers/hwmon/via686a.c
@@ -41,6 +41,7 @@
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
+#include <linux/acpi.h>
#include <asm/io.h>

@@ -755,6 +756,10 @@ static int __devinit via686a_device_add(
};
int err;

+ err = acpi_check_resource_conflict(&res);
+ if (err)
+ goto exit;
+
pdev = platform_device_alloc("via686a", address);
if (!pdev) {
err = -ENOMEM;
diff -puN drivers/hwmon/vt1211.c~check-for-acpi-resource-conflicts-in-hwmon-drivers drivers/hwmon/vt1211.c
--- a/drivers/hwmon/vt1211.c~check-for-acpi-resource-conflicts-in-hwmon-drivers
+++ a/drivers/hwmon/vt1211.c
@@ -32,6 +32,7 @@
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/ioport.h>
+#include <linux/acpi.h>
#include <asm/io.h>

static int uch_config = -1;
@@ -1259,6 +1260,10 @@ static int __init vt1211_device_add(unsi
}

res.name = pdev->name;
+ err = acpi_check_resource_conflict(&res);
+ if (err)
+ goto EXIT;
+
err = platform_device_add_resources(pdev, &res, 1);
if (err) {
printk(KERN_ERR DRVNAME ": Device resource addition failed "
diff -puN drivers/hwmon/vt8231.c~check-for-acpi-resource-conflicts-in-hwmon-drivers drivers/hwmon/vt8231.c
--- a/drivers/hwmon/vt8231.c~check-for-acpi-resource-conflicts-in-hwmon-drivers
+++ a/drivers/hwmon/vt8231.c
@@ -35,6 +35,7 @@
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
+#include <linux/acpi.h>
#include <asm/io.h>

static int force_addr;
@@ -858,6 +859,10 @@ static int __devinit vt8231_device_add(u
};
int err;

+ err = acpi_check_resource_conflict(&res);
+ if (err)
+ goto exit;
+
pdev = platform_device_alloc("vt8231", address);
if (!pdev) {
err = -ENOMEM;
diff -puN drivers/hwmon/w83627ehf.c~check-for-acpi-resource-conflicts-in-hwmon-drivers drivers/hwmon/w83627ehf.c
--- a/drivers/hwmon/w83627ehf.c~check-for-acpi-resource-conflicts-in-hwmon-drivers
+++ a/drivers/hwmon/w83627ehf.c
@@ -48,6 +48,7 @@
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
+#include <linux/acpi.h>
#include <asm/io.h>
#include "lm75.h"

@@ -1544,6 +1545,11 @@ static int __init sensors_w83627ehf_init
res.start = address + IOREGION_OFFSET;
res.end = address + IOREGION_OFFSET + IOREGION_LENGTH - 1;
res.flags = IORESOURCE_IO;
+
+ err = acpi_check_resource_conflict(&res);
+ if (err)
+ goto exit;
+
err = platform_device_add_resources(pdev, &res, 1);
if (err) {
printk(KERN_ERR DRVNAME ": Device resource addition failed "
diff -puN drivers/hwmon/w83627hf.c~check-for-acpi-resource-conflicts-in-hwmon-drivers drivers/hwmon/w83627hf.c
--- a/drivers/hwmon/w83627hf.c~check-for-acpi-resource-conflicts-in-hwmon-drivers
+++ a/drivers/hwmon/w83627hf.c
@@ -50,6 +50,7 @@
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/ioport.h>
+#include <linux/acpi.h>
#include <asm/io.h>
#include "lm75.h"

@@ -1746,6 +1747,10 @@ static int __init w83627hf_device_add(un
};
int err;

+ err = acpi_check_resource_conflict(&res);
+ if (err)
+ goto exit;
+
pdev = platform_device_alloc(DRVNAME, address);
if (!pdev) {
err = -ENOMEM;
_