via: Do not attempt I/O on inactive I2C adapters

If an adapter has been configured for GPIO (or off), we should not try to
use it as an I2C port.

Cc: ScottFang@viatech.com.cn
Cc: JosephChan@via.com.tw
Cc: Harald Welte <laforge@gnumonks.org>
Acked-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/video/via/via_i2c.h b/drivers/video/via/via_i2c.h
index b2332cce9d18..1d18e7d57b7f 100644
--- a/drivers/video/via/via_i2c.h
+++ b/drivers/video/via/via_i2c.h
@@ -26,6 +26,7 @@
 
 struct via_i2c_stuff {
         u16 i2c_port;                   /* GPIO or I2C port */
+        u16 is_active;                  /* Being used as I2C? */
         struct i2c_adapter adapter;
         struct i2c_algo_bit_data algo;
 };