The patch number 14429 was added via Manu Abraham <[email protected]>
to http://linuxtv.org/hg/v4l-dvb master development tree.
Kernel patches in this development tree may be modified to be backward
compatible with older kernels. Compatibility modifications will be
removed before inclusion into the mainstream Kernel
If anyone has any objections, please let us know by sending a message to:
Linux Media Mailing List <[email protected]>
------
From: Manu Abraham <[email protected]>
stv090x: Add some notes about the internal tuner I/O control
Signed-off-by: Manu Abraham <[email protected]>
---
linux/drivers/media/dvb/frontends/stv090x.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff -r 27a8b3a8415f -r 6d166305382b linux/drivers/media/dvb/frontends/stv090x.c
--- a/linux/drivers/media/dvb/frontends/stv090x.c Sat Feb 13 23:48:07
2010 +0400
+++ b/linux/drivers/media/dvb/frontends/stv090x.c Sun Feb 14 00:06:14
2010 +0400
@@ -1489,6 +1489,15 @@
{
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);
---
Patch is available at:
http://linuxtv.org/hg/v4l-dvb/rev/6d166305382b0641e355960525b3fde4a9c5a652
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