Use kzalloc for frontend states to have struct dvb_frontend properly

From: Matthias Schwarzott <zzam@gentoo.org>

This patch changes most frontend drivers to allocate their state structure via
kzalloc and not kmalloc. This is done to properly initialize the
embedded "struct dvb_frontend frontend" field, that they all have.

The visible effect of this struct being uninitalized is, that the member "id"
that is used to set the name of kernel thread is totally random.

Some board drivers (for example cx88-dvb) set this "id" via
videobuf_dvb_alloc_frontend but most do not.

So I at least get random id values for saa7134, flexcop and ttpci based cards.
It looks like this in dmesg:
DVB: registering adapter 1 frontend -10551321 (ST STV0299 DVB-S)

The related kernel thread then also gets a strange name
like "kdvb-ad-1-fe--1".

Priority: normal

Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
CC: Michael Krufky <mkrufky@linuxtv.org>
CC: Steven Toth <stoth@linuxtv.org>
CC: Timothy Lee <timothy.lee@siriushk.com>
CC: Igor M. Liplianin <liplianin@me.by>
Acked-by: Andreas Oberritter <obi@linuxtv.org>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/linux/drivers/media/dvb/frontends/stv0288.c b/linux/drivers/media/dvb/frontends/stv0288.c
index ff1194de3..2930a5d67 100644
--- a/linux/drivers/media/dvb/frontends/stv0288.c
+++ b/linux/drivers/media/dvb/frontends/stv0288.c
@@ -570,7 +570,7 @@ struct dvb_frontend *stv0288_attach(const struct stv0288_config *config,
 	int id;
 
 	/* allocate memory for the internal state */
-	state = kmalloc(sizeof(struct stv0288_state), GFP_KERNEL);
+	state = kzalloc(sizeof(struct stv0288_state), GFP_KERNEL);
 	if (state == NULL)
 		goto error;