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HID: Remove the semaphore driver_lock

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The semaphore 'driver_lock' is used as a simple mutex, and also unnecessary as
suggested by Arnd. Hence removing it, as the concurrency between the probe and
remove is already handled in the driver core.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Binoy Jayan <binoy.jayan@linaro.org>
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Binoy Jayan
2017-06-14 12:59:51 +05:30
committed by Jiri Kosina
parent a9d0683e0b
commit 6f68f0ac72
2 changed files with 5 additions and 13 deletions
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3
include/linux/hid.h
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@@ -526,7 +526,6 @@ struct hid_device { /* device report descriptor */
struct hid_report_enum report_enum[HID_REPORT_TYPES];
struct work_struct led_work; /* delayed LED worker */
struct semaphore driver_lock; /* protects the current driver, except during input */
struct semaphore driver_input_lock; /* protects the current driver */
struct device dev; /* device */
struct hid_driver *driver;
@@ -551,7 +550,7 @@ struct hid_device { /* device report descriptor */
unsigned int status; /* see STAT flags above */
unsigned claimed; /* Claimed by hidinput, hiddev? */
unsigned quirks; /* Various quirks the device can pull on us */
bool io_started; /* Protected by driver_lock. If IO has started */
bool io_started; /* If IO has started */
struct list_head inputs; /* The list of inputs */
void *hiddev; /* The hiddev structure */