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Subject[PATCH 21/23] dvb-frontends: Replace memcpy with struct assignment
Date
This kind of memcpy() is error-prone. Its replacement with a struct
assignment is prefered because it's type-safe and much easier to read.

Found by coccinelle. Hand patched and reviewed.
Tested by compilation only.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
identifier struct_name;
struct struct_name to;
struct struct_name from;
expression E;
@@
-memcpy(&(to), &(from), E);
+to = from;
// </smpl>

Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com>
---
drivers/media/dvb-frontends/cx24116.c | 2 +-
drivers/media/dvb-frontends/drxd_hard.c | 5 ++---
drivers/media/dvb-frontends/stv0299.c | 2 +-
3 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/media/dvb-frontends/cx24116.c b/drivers/media/dvb-frontends/cx24116.c
index b488791..2916d7c 100644
--- a/drivers/media/dvb-frontends/cx24116.c
+++ b/drivers/media/dvb-frontends/cx24116.c
@@ -819,7 +819,7 @@ static int cx24116_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
static void cx24116_clone_params(struct dvb_frontend *fe)
{
struct cx24116_state *state = fe->demodulator_priv;
- memcpy(&state->dcur, &state->dnxt, sizeof(state->dcur));
+ state->dcur = state->dnxt;
}

/* Wait for LNB */
diff --git a/drivers/media/dvb-frontends/drxd_hard.c b/drivers/media/dvb-frontends/drxd_hard.c
index 6d98537..dca1752 100644
--- a/drivers/media/dvb-frontends/drxd_hard.c
+++ b/drivers/media/dvb-frontends/drxd_hard.c
@@ -2963,7 +2963,7 @@ struct dvb_frontend *drxd_attach(const struct drxd_config *config,
return NULL;
memset(state, 0, sizeof(*state));

- memcpy(&state->ops, &drxd_ops, sizeof(struct dvb_frontend_ops));
+ state->ops = drxd_ops;
state->dev = dev;
state->config = *config;
state->i2c = i2c;
@@ -2974,8 +2974,7 @@ struct dvb_frontend *drxd_attach(const struct drxd_config *config,
if (Read16(state, 0, 0, 0) < 0)
goto error;

- memcpy(&state->frontend.ops, &drxd_ops,
- sizeof(struct dvb_frontend_ops));
+ state->frontend.ops = drxd_ops;
state->frontend.demodulator_priv = state;
ConfigureMPEGOutput(state, 0);
return &state->frontend;
diff --git a/drivers/media/dvb-frontends/stv0299.c b/drivers/media/dvb-frontends/stv0299.c
index 92a6075..b57ecf4 100644
--- a/drivers/media/dvb-frontends/stv0299.c
+++ b/drivers/media/dvb-frontends/stv0299.c
@@ -420,7 +420,7 @@ static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long

do_gettimeofday (&nexttime);
if (debug_legacy_dish_switch)
- memcpy (&tv[0], &nexttime, sizeof (struct timeval));
+ tv[0] = nexttime;
stv0299_writeregI (state, 0x0c, reg0x0c | 0x50); /* set LNB to 18V */

dvb_frontend_sleep_until(&nexttime, 32000);
--
1.7.4.4


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