From 90bf3aab42937f760e5b645ab63df46d26b5e620 Mon Sep 17 00:00:00 2001
From: Mauro Carvalho Chehab <mchehab@redhat.com>
Date: Mon, 9 Jan 2012 22:28:13 -0200
Subject: [PATCH] [media] cx231xx-input: stop polling if the device got
removed.
If the device got removed, stops polling it. Also, un-registers
it at input/evdev, as it won't work anymore. We can't free the
IR structure yet, as the ir_remove method will be called later.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---
drivers/media/video/cx231xx/cx231xx-input.c | 6 +++++-
drivers/media/video/ir-kbd-i2c.c | 17 +++++++++++++----
2 files changed, 18 insertions(+), 5 deletions(-)
diff --git a/drivers/media/video/cx231xx/cx231xx-input.c b/drivers/media/video/cx231xx/cx231xx-input.c
index 45e14cac4622..8a75a908e709 100644
--- a/drivers/media/video/cx231xx/cx231xx-input.c
+++ b/drivers/media/video/cx231xx/cx231xx-input.c
@@ -27,12 +27,16 @@
static int get_key_isdbt(struct IR_i2c *ir, u32 *ir_key,
u32 *ir_raw)
{
+ int rc;
u8 cmd, scancode;
dev_dbg(&ir->rc->input_dev->dev, "%s\n", __func__);
/* poll IR chip */
- if (1 != i2c_master_recv(ir->c, &cmd, 1))
+ rc = i2c_master_recv(ir->c, &cmd, 1);
+ if (rc < 0)
+ return rc;
+ if (rc != 1)
return -EIO;
/* it seems that 0xFE indicates that a button is still hold
diff --git a/drivers/media/video/ir-kbd-i2c.c b/drivers/media/video/ir-kbd-i2c.c
index 3ab875d036e1..37d0c2012519 100644
--- a/drivers/media/video/ir-kbd-i2c.c
+++ b/drivers/media/video/ir-kbd-i2c.c
@@ -244,7 +244,7 @@ static int get_key_avermedia_cardbus(struct IR_i2c *ir,
/* ----------------------------------------------------------------------- */
-static void ir_key_poll(struct IR_i2c *ir)
+static int ir_key_poll(struct IR_i2c *ir)
{
static u32 ir_key, ir_raw;
int rc;
@@ -253,20 +253,28 @@ static void ir_key_poll(struct IR_i2c *ir)
rc = ir->get_key(ir, &ir_key, &ir_raw);
if (rc < 0) {
dprintk(2,"error\n");
- return;
+ return rc;
}
if (rc) {
dprintk(1, "%s: keycode = 0x%04x\n", __func__, ir_key);
rc_keydown(ir->rc, ir_key, 0);
}
+ return 0;
}
static void ir_work(struct work_struct *work)
{
+ int rc;
struct IR_i2c *ir = container_of(work, struct IR_i2c, work.work);
- ir_key_poll(ir);
+ rc = ir_key_poll(ir);
+ if (rc == -ENODEV) {
+ rc_unregister_device(ir->rc);
+ ir->rc = NULL;
+ return;
+ }
+
schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling_interval));
}
@@ -446,7 +454,8 @@ static int ir_remove(struct i2c_client *client)
cancel_delayed_work_sync(&ir->work);
/* unregister device */
- rc_unregister_device(ir->rc);
+ if (ir->rc)
+ rc_unregister_device(ir->rc);
/* free memory */
kfree(ir);