Subject: ACPI: Correct wakeup set error and append a new column PCI ID
From: Yi Yang <yi.y.yang@xxxxxxxxx>
The user can't get any information when echo an invalid value to
/proc/acpi/wakeup although it is failed, but the user can set
/proc/acpi/wakeup successfully if echo an value whose prefix is a
valid value for /proc/acpi/wakeup no matter what the suffix is.
/proc/acpi/wakeup is also case-sensitive, case-insensitive is better.
This patch will fix the aforementioned issues, it will return the error
information if input is an invalid value, it also make /proc/acpi/wakeup
case-insensitive, i.e. it consider 'SLPB' and 'sLpb'are the same.
In addtion, this patch appends a new column 'PCI ID' to /proc/acpi/wakeup
, the user can use it to get the corresponding device name very
conveniently because PCI ID is a unique identifier and platform-independent.
Before applying this patch, the output is:
[root@localhost ~]# cat /proc/acpi/wakeup
Device S-state Status Sysfs node
C093 S5 disabled pci:0000:00:1e.0
C0E8 S3 disabled pci:0000:00:1d.0
C0EF S3 disabled pci:0000:00:1d.1
C0F0 S3 disabled pci:0000:00:1d.2
C0F1 S3 disabled pci:0000:00:1d.3
C0F2 S3 disabled pci:0000:00:1d.7
C0F9 S0 disabled pci:0000:00:1c.0
C21D S0 disabled pci:0000:08:00.0
C109 S5 disabled pci:0000:00:1c.1
C228 S5 disabled pci:0000:10:00.0
C10F S5 disabled pci:0000:00:1c.3
C229 S5 disabled
[root@localhost ~]# echo "xyzw" > /proc/acpi/wakeup
[root@localhost ~]# echo "C093xxxxxxxxx" > /proc/acpi/wakeup
[root@localhost ~]# cat /proc/acpi/wakeup
Device S-state Status Sysfs node
C093 S5 enabled pci:0000:00:1e.0
C0E8 S3 disabled pci:0000:00:1d.0
C0EF S3 disabled pci:0000:00:1d.1
C0F0 S3 disabled pci:0000:00:1d.2
C0F1 S3 disabled pci:0000:00:1d.3
C0F2 S3 disabled pci:0000:00:1d.7
C0F9 S0 disabled pci:0000:00:1c.0
C21D S0 disabled pci:0000:08:00.0
C109 S5 disabled pci:0000:00:1c.1
C228 S5 disabled pci:0000:10:00.0
C10F S5 disabled pci:0000:00:1c.3
C229 S5 disabled
[root@localhost ~]# echo "C093xxxxxxxxx" > /proc/acpi/wakeup
[root@localhost ~]# cat /proc/acpi/wakeup
Device S-state Status Sysfs node
C093 S5 disabled pci:0000:00:1e.0
C0E8 S3 disabled pci:0000:00:1d.0
C0EF S3 disabled pci:0000:00:1d.1
C0F0 S3 disabled pci:0000:00:1d.2
C0F1 S3 disabled pci:0000:00:1d.3
C0F2 S3 disabled pci:0000:00:1d.7
C0F9 S0 disabled pci:0000:00:1c.0
C21D S0 disabled pci:0000:08:00.0
C109 S5 disabled pci:0000:00:1c.1
C228 S5 disabled pci:0000:10:00.0
C10F S5 disabled pci:0000:00:1c.3
C229 S5 disabled
[root@localhost ~]# echo "c093" > /proc/acpi/wakeup
[root@localhost ~]# cat /proc/acpi/wakeup
Device S-state Status Sysfs node
C093 S5 disabled pci:0000:00:1e.0
C0E8 S3 disabled pci:0000:00:1d.0
C0EF S3 disabled pci:0000:00:1d.1
C0F0 S3 disabled pci:0000:00:1d.2
C0F1 S3 disabled pci:0000:00:1d.3
C0F2 S3 disabled pci:0000:00:1d.7
C0F9 S0 disabled pci:0000:00:1c.0
C21D S0 disabled pci:0000:08:00.0
C109 S5 disabled pci:0000:00:1c.1
C228 S5 disabled pci:0000:10:00.0
C10F S5 disabled pci:0000:00:1c.3
C229 S5 disabled
[root@localhost ~]#
After applying this patch, the output is:
[root@localhost ~]# cat /proc/acpi/wakeup
Device S-state Status Sysfs node PCI ID
C093 S5 disabled pci:0000:00:1e.0 0x2448
C0E8 S3 disabled pci:0000:00:1d.0 0x27c8
C0EF S3 disabled pci:0000:00:1d.1 0x27c9
C0F0 S3 disabled pci:0000:00:1d.2 0x27ca
C0F1 S3 disabled pci:0000:00:1d.3 0x27cb
C0F2 S3 disabled pci:0000:00:1d.7 0x27cc
C0F9 S0 disabled pci:0000:00:1c.0 0x27d0
C21D S0 disabled pci:0000:08:00.0 0x16fd
C109 S5 disabled pci:0000:00:1c.1 0x27d2
C228 S5 disabled pci:0000:10:00.0 0x4222
C10F S5 disabled pci:0000:00:1c.3 0x27d6
C229 S5 disabled
[root@localhost ~]# echo "xyzw" > /proc/acpi/wakeup
-bash: echo: write error: Invalid argument
[root@localhost ~]# echo "C093xxxxxxxxx" > /proc/acpi/wakeup
-bash: echo: write error: Invalid argument
[root@localhost ~]# cat /proc/acpi/wakeup
Device S-state Status Sysfs node PCI ID
C093 S5 disabled pci:0000:00:1e.0 0x2448
C0E8 S3 disabled pci:0000:00:1d.0 0x27c8
C0EF S3 disabled pci:0000:00:1d.1 0x27c9
C0F0 S3 disabled pci:0000:00:1d.2 0x27ca
C0F1 S3 disabled pci:0000:00:1d.3 0x27cb
C0F2 S3 disabled pci:0000:00:1d.7 0x27cc
C0F9 S0 disabled pci:0000:00:1c.0 0x27d0
C21D S0 disabled pci:0000:08:00.0 0x16fd
C109 S5 disabled pci:0000:00:1c.1 0x27d2
C228 S5 disabled pci:0000:10:00.0 0x4222
C10F S5 disabled pci:0000:00:1c.3 0x27d6
C229 S5 disabled
[root@localhost ~]# echo "c093" > /proc/acpi/wakeup
[root@localhost ~]# cat /proc/acpi/wakeup
Device S-state Status Sysfs node PCI ID
C093 S5 enabled pci:0000:00:1e.0 0x2448
C0E8 S3 disabled pci:0000:00:1d.0 0x27c8
C0EF S3 disabled pci:0000:00:1d.1 0x27c9
C0F0 S3 disabled pci:0000:00:1d.2 0x27ca
C0F1 S3 disabled pci:0000:00:1d.3 0x27cb
C0F2 S3 disabled pci:0000:00:1d.7 0x27cc
C0F9 S0 disabled pci:0000:00:1c.0 0x27d0
C21D S0 disabled pci:0000:08:00.0 0x16fd
C109 S5 disabled pci:0000:00:1c.1 0x27d2
C228 S5 disabled pci:0000:10:00.0 0x4222
C10F S5 disabled pci:0000:00:1c.3 0x27d6
C229 S5 disabled
[root@localhost ~]# echo "C093" > /proc/acpi/wakeup
[root@localhost ~]# cat /proc/acpi/wakeup
Device S-state Status Sysfs node PCI ID
C093 S5 disabled pci:0000:00:1e.0 0x2448
C0E8 S3 disabled pci:0000:00:1d.0 0x27c8
C0EF S3 disabled pci:0000:00:1d.1 0x27c9
C0F0 S3 disabled pci:0000:00:1d.2 0x27ca
C0F1 S3 disabled pci:0000:00:1d.3 0x27cb
C0F2 S3 disabled pci:0000:00:1d.7 0x27cc
C0F9 S0 disabled pci:0000:00:1c.0 0x27d0
C21D S0 disabled pci:0000:08:00.0 0x16fd
C109 S5 disabled pci:0000:00:1c.1 0x27d2
C228 S5 disabled pci:0000:10:00.0 0x4222
C10F S5 disabled pci:0000:00:1c.3 0x27d6
C229 S5 disabled
[root@localhost ~]#
Signed-off-by: Yi Yang <yi.y.yang@xxxxxxxxx>
---
proc.c | 28 ++++++++++++++++------------
1 file changed, 16 insertions(+), 12 deletions(-)
diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c
index f8df521..a19b6bd 100644
--- a/drivers/acpi/sleep/proc.c
+++ b/drivers/acpi/sleep/proc.c
@@ -3,6 +3,7 @@
#include <linux/suspend.h>
#include <linux/bcd.h>
#include <asm/uaccess.h>
+#include <linux/pci.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
@@ -343,7 +344,7 @@ acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
{
struct list_head *node, *next;
- seq_printf(seq, "Device\tS-state\t Status Sysfs node\n");
+ seq_printf(seq, "Device\tS-state\t Status Sysfs node\t\tPCI ID\n");
spin_lock(&acpi_device_lock);
list_for_each_safe(node, next, &acpi_wakeup_device_list) {
@@ -362,9 +363,9 @@ acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
dev->wakeup.flags.run_wake ? '*' : ' ',
dev->wakeup.state.enabled ? "enabled" : "disabled");
if (ldev)
- seq_printf(seq, "%s:%s",
+ seq_printf(seq, "%s:%-12s\t0x%04x",
ldev->bus ? ldev->bus->name : "no-bus",
- ldev->bus_id);
+ ldev->bus_id, to_pci_dev(ldev)->device);
seq_printf(seq, "\n");
put_device(ldev);
@@ -380,18 +381,18 @@ acpi_system_write_wakeup_device(struct file *file,
size_t count, loff_t * ppos)
{
struct list_head *node, *next;
- char strbuf[5];
- char str[5] = "";
+ char str[6] = "";
int len = count;
struct acpi_device *found_dev = NULL;
- if (len > 4)
- len = 4;
+ if (len > 5)
+ return -EINVAL;
- if (copy_from_user(strbuf, buffer, len))
+ if (copy_from_user(str, buffer, len))
return -EFAULT;
- strbuf[len] = '\0';
- sscanf(strbuf, "%s", str);
+ str[len] = '\0';
+ if (str[len-1] == '\n')
+ str[len-1] = '\0';
spin_lock(&acpi_device_lock);
list_for_each_safe(node, next, &acpi_wakeup_device_list) {
@@ -400,7 +401,7 @@ acpi_system_write_wakeup_device(struct file *file,
if (!dev->wakeup.flags.valid)
continue;
- if (!strncmp(dev->pnp.bus_id, str, 4)) {
+ if (!strnicmp(dev->pnp.bus_id, str, 4)) {
dev->wakeup.state.enabled =
dev->wakeup.state.enabled ? 0 : 1;
found_dev = dev;
@@ -429,7 +430,10 @@ acpi_system_write_wakeup_device(struct file *file,
}
}
spin_unlock(&acpi_device_lock);
- return count;
+ if (found_dev == NULL)
+ return -EINVAL;
+ else
+ return count;
}
static int
-
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