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HID: lg4ff: Remove sysfs iface before deallocating memory

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This patch fixes a possible race condition caused by the sysfs
interface being removed after the memory used by the interface
was already kfree'd.

Signed-off-by: Michal Malý <madcatsxter@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Michal Malý 2012-03-31 11:35:05 +02:00 committed by Jiri Kosina
parent 8577dbf9d6
commit 6a2e176b2d
2 changed files with 4 additions and 4 deletions
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2
drivers/hid/hid-lg.h
View File

@ -1,8 +1,6 @@
#ifndef __HID_LG_H
#define __HID_LG_H
#include <linux/spinlock.h>
struct lg_drv_data {
unsigned long quirks;
void *device_props; /* Device specific properties */

6
drivers/hid/hid-lg4ff.c
View File

@ -466,6 +466,9 @@ int lg4ff_deinit(struct hid_device *hid)
bool found = 0;
struct lg4ff_device_entry *entry;
struct list_head *h, *g;
device_remove_file(&hid->dev, &dev_attr_range);
list_for_each_safe(h, g, &device_list.list) {
entry = list_entry(h, struct lg4ff_device_entry, list);
if (strcmp(entry->device_id, (&hid->dev)->kobj.name) == 0) {
@ -478,11 +481,10 @@ int lg4ff_deinit(struct hid_device *hid)
}
if (!found) {
dbg_hid("Device entry not found!\n");
hid_err(hid, "Device entry not found!\n");
return -1;
}
device_remove_file(&hid->dev, &dev_attr_range);
dbg_hid("Device successfully unregistered\n");
return 0;
}