Hi, 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. Please note that this patch depends on "hid-lg: Allow for custom device-specific properties to be stored in private drv data" because it also fixes a tiny glitch - a leftover #include in the hid-lg.h I have another lg4ff patch pending that makes use of the new possibility to store device-specific data which is currently being review by Simon. The patch as it is right now will depend on this patch. Signed-off-by: Michal Malý <madcatsxter@xxxxxxxxx> --- drivers/hid/hid-lg.h | 2 -- drivers/hid/hid-lg4ff.c | 6 ++++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/hid/hid-lg.h b/drivers/hid/hid-lg.h index 500457b..d64cf8d 100644 --- a/drivers/hid/hid-lg.h +++ b/drivers/hid/hid-lg.h @@ -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 */ diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c index 6ecc9e2..1145292 100644 --- a/drivers/hid/hid-lg4ff.c +++ b/drivers/hid/hid-lg4ff.c @@ -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; } -- 1.7.9.5
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