V4L/DVB (3173): [PATCH] Decrease number of pointer derefs in flexcop-fe-tuner.c

- Here's a small patch to decrease the number of pointer derefs in
drivers/media/dvb/b2c2/flexcop-fe-tuner.c
Benefits of the patch:
- Fewer pointer dereferences should make the code slightly faster.
- Size of generated code is smaller
- Improved readability

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>

diff --git a/drivers/media/dvb/b2c2/flexcop-fe-tuner.c b/drivers/media/dvb/b2c2/flexcop-fe-tuner.c
index 21a9045..fa70581 100644 (file)
--- a/drivers/media/dvb/b2c2/flexcop-fe-tuner.c
+++ b/drivers/media/dvb/b2c2/flexcop-fe-tuner.c
@@ -485,12 +485,16 @@ static struct stv0297_config alps_tdee4_stv0297_config = {
 /* try to figure out the frontend, each card/box can have on of the following list */
 int flexcop_frontend_init(struct flexcop_device *fc)
 {
+       struct dvb_frontend_ops *ops;
+
        /* try the sky v2.6 (stv0299/Samsung tbmu24112(sl1935)) */
        if ((fc->fe = stv0299_attach(&samsung_tbmu24112_config, &fc->i2c_adap)) != NULL) {
-               fc->fe->ops->set_voltage = flexcop_set_voltage;
+               ops = fc->fe->ops;
+
+               ops->set_voltage = flexcop_set_voltage;
 
-               fc->fe_sleep             = fc->fe->ops->sleep;
-               fc->fe->ops->sleep       = flexcop_sleep;
+               fc->fe_sleep             = ops->sleep;
+               ops->sleep               = flexcop_sleep;
 
                fc->dev_type          = FC_SKY;
                info("found the stv0299 at i2c address: 0x%02x",samsung_tbmu24112_config.demod_address);
@@ -522,15 +526,17 @@ int flexcop_frontend_init(struct flexcop_device *fc)
        } else
        /* try the sky v2.3 (vp310/Samsung tbdu18132(tsa5059)) */
        if ((fc->fe = vp310_attach(&skystar23_samsung_tbdu18132_config, &fc->i2c_adap)) != NULL) {
-               fc->fe->ops->diseqc_send_master_cmd = flexcop_diseqc_send_master_cmd;
-               fc->fe->ops->diseqc_send_burst      = flexcop_diseqc_send_burst;
-               fc->fe->ops->set_tone               = flexcop_set_tone;
-               fc->fe->ops->set_voltage            = flexcop_set_voltage;
+               ops = fc->fe->ops;
+
+               ops->diseqc_send_master_cmd = flexcop_diseqc_send_master_cmd;
+               ops->diseqc_send_burst      = flexcop_diseqc_send_burst;
+               ops->set_tone               = flexcop_set_tone;
+               ops->set_voltage            = flexcop_set_voltage;
 
-               fc->fe_sleep                        = fc->fe->ops->sleep;
-               fc->fe->ops->sleep                  = flexcop_sleep;
+               fc->fe_sleep                = ops->sleep;
+               ops->sleep                  = flexcop_sleep;
 
-               fc->dev_type                        = FC_SKY_OLD;
+               fc->dev_type                = FC_SKY_OLD;
                info("found the vp310 (aka mt312) at i2c address: 0x%02x",skystar23_samsung_tbdu18132_config.demod_address);
        }
 
@@ -540,8 +546,9 @@ int flexcop_frontend_init(struct flexcop_device *fc)
        } else {
                if (dvb_register_frontend(&fc->dvb_adapter, fc->fe)) {
                        err("frontend registration failed!");
-                       if (fc->fe->ops->release != NULL)
-                               fc->fe->ops->release(fc->fe);
+                       ops = fc->fe->ops;
+                       if (ops->release != NULL)
+                               ops->release(fc->fe);
                        fc->fe = NULL;
                        return -EINVAL;
                }