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| author | Frank Schaefer <fschaefer.oss@googlemail.com> | 2014-08-15 18:16:58 (GMT) |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2014-09-22 20:29:06 (GMT) |
| commit | 78e719a5f30b7017b575c08220f4480e3140c6f1 (patch) | |
| tree | 363b5f67d31507e2e17948d0a04ef9c533a911f7 /drivers/media/usb | |
| parent | 5611588b86492eded428cad0f698c39178f88d23 (diff) | |
| download | linux-78e719a5f30b7017b575c08220f4480e3140c6f1.tar.xz | |
[media] em28xx-input: i2c IR decoders: improve i2c_client handling
Instead of using a temporary stack allocated i2c_client in em28xx_i2c_ir_handle_key(),
allocate/free the i2c_client at module init/uninit and hook it into struct em28xx_IR
(if the device has an i2c IR decoder).
This reduces the frame size of function em28xx_i2c_ir_handle_key() and speeds
it up a bit.
Also make sure that all fields of struct i2c_client are initialized properly.
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/usb')
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-input.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-input.c b/drivers/media/usb/em28xx/em28xx-input.c index e978a2a..581f6da 100644 --- a/drivers/media/usb/em28xx/em28xx-input.c +++ b/drivers/media/usb/em28xx/em28xx-input.c @@ -71,8 +71,7 @@ struct em28xx_IR { unsigned int last_readcount; u64 rc_type; - /* i2c slave address of external device (if used) */ - u16 i2c_dev_addr; + struct i2c_client *i2c_client; int (*get_key_i2c)(struct i2c_client *ir, enum rc_type *protocol, u32 *scancode); int (*get_key)(struct em28xx_IR *, struct em28xx_ir_poll_result *); @@ -294,16 +293,11 @@ static int em2874_polling_getkey(struct em28xx_IR *ir, static int em28xx_i2c_ir_handle_key(struct em28xx_IR *ir) { - struct em28xx *dev = ir->dev; static u32 scancode; enum rc_type protocol; int rc; - struct i2c_client client; - - client.adapter = &ir->dev->i2c_adap[dev->def_i2c_bus]; - client.addr = ir->i2c_dev_addr; - rc = ir->get_key_i2c(&client, &protocol, &scancode); + rc = ir->get_key_i2c(ir->i2c_client, &protocol, &scancode); if (rc < 0) { dprintk("ir->get_key_i2c() failed: %d\n", rc); return rc; @@ -361,7 +355,7 @@ static void em28xx_ir_work(struct work_struct *work) { struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work); - if (ir->i2c_dev_addr) /* external i2c device */ + if (ir->i2c_client) /* external i2c device */ em28xx_i2c_ir_handle_key(ir); else /* internal device */ em28xx_ir_handle_key(ir); @@ -756,7 +750,13 @@ static int em28xx_ir_init(struct em28xx *dev) goto error; } - ir->i2c_dev_addr = i2c_rc_dev_addr; + ir->i2c_client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); + if (!ir->i2c_client) + goto error; + ir->i2c_client->adapter = &ir->dev->i2c_adap[dev->def_i2c_bus]; + ir->i2c_client->addr = i2c_rc_dev_addr; + ir->i2c_client->flags = 0; + /* NOTE: all other fields of i2c_client are unused */ } else { /* internal device */ switch (dev->chip_id) { case CHIP_ID_EM2860: @@ -815,6 +815,7 @@ static int em28xx_ir_init(struct em28xx *dev) return 0; error: + kfree(ir->i2c_client); dev->ir = NULL; rc_free_device(rc); kfree(ir); @@ -841,6 +842,8 @@ static int em28xx_ir_fini(struct em28xx *dev) if (ir->rc) rc_unregister_device(ir->rc); + kfree(ir->i2c_client); + /* done */ kfree(ir); dev->ir = NULL; |