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Input: evdev - fix bug in checking duplicate clock change request

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clk_type and clkid stores different predefined clock identification
values so they cannot be compared for checking duplicate clock change
request. Therefore, lets fix it to avoid unexpected results.

Signed-off-by: Aniroop Mathur <a.mathur@samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Aniroop Mathur 2015-10-30 04:15:37 -07:00 committed by Dmitry Torokhov
parent 5523662edd
commit bf5f18d708
1 changed files with 19 additions and 17 deletions
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36
drivers/input/evdev.c
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@ -56,7 +56,7 @@ struct evdev_client {
struct fasync_struct *fasync;
struct evdev *evdev;
struct list_head node;
int clk_type;
unsigned int clk_type;
bool revoked;
unsigned long *evmasks[EV_CNT];
unsigned int bufsize;
@ -191,38 +191,40 @@ static void evdev_queue_syn_dropped(struct evdev_client *client)
static int evdev_set_clk_type(struct evdev_client *client, unsigned int clkid)
{
unsigned long flags;
if (client->clk_type == clkid)
return 0;
unsigned int clk_type;
switch (clkid) {
case CLOCK_REALTIME:
client->clk_type = EV_CLK_REAL;
clk_type = EV_CLK_REAL;
break;
case CLOCK_MONOTONIC:
client->clk_type = EV_CLK_MONO;
clk_type = EV_CLK_MONO;
break;
case CLOCK_BOOTTIME:
client->clk_type = EV_CLK_BOOT;
clk_type = EV_CLK_BOOT;
break;
default:
return -EINVAL;
}
/*
* Flush pending events and queue SYN_DROPPED event,
* but only if the queue is not empty.
*/
spin_lock_irqsave(&client->buffer_lock, flags);
if (client->clk_type != clk_type) {
client->clk_type = clk_type;
if (client->head != client->tail) {
client->packet_head = client->head = client->tail;
__evdev_queue_syn_dropped(client);
/*
* Flush pending events and queue SYN_DROPPED event,
* but only if the queue is not empty.
*/
spin_lock_irqsave(&client->buffer_lock, flags);
if (client->head != client->tail) {
client->packet_head = client->head = client->tail;
__evdev_queue_syn_dropped(client);
}
spin_unlock_irqrestore(&client->buffer_lock, flags);
}
spin_unlock_irqrestore(&client->buffer_lock, flags);
return 0;
}