Commit c8382c8e authored by Manu Abraham's avatar Manu Abraham Committed by Mauro Carvalho Chehab
Browse files

V4L/DVB: stv090x: Add some notes about the internal tuner I/O control 



Signed-off-by: default avatarManu Abraham <manu@linuxtv.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 5817ea0c

drivers/media/dvb/frontends/stv090x.c

+9 −0
Original line number Diff line number Diff line
@@ -758,6 +758,15 @@ static int stv090x_i2c_gate_ctrl(struct stv090x_state *state, int enable) 
{

	u32 reg;



	/*

	 * NOTE! A lock is used as a FSM to control the state in which

	 * access is serialized between two tuners on the same demod.

	 * This has nothing to do with a lock to protect a critical section

	 * which may in some other cases be confused with protecting I/O

	 * access to the demodulator gate.

	 * In case of any error, the lock is unlocked and exit within the

	 * relevant operations themselves.

	 */

	if (enable)

		mutex_lock(&state->internal->tuner_lock);