Quoting Ville Syrjala (2017-11-23 19:41:55)
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> We're supposed to examine msgs[i] and msgs[i+1] to see if they
> form a pair suitable for an indexed transfer. But in reality
> we're examining msgs[0] and msgs[1]. Fix this.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Cc: Daniel Kurtz <djkurtz@xxxxxxxxxxxx>
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
> Cc: Sean Paul <seanpaul@xxxxxxxxxxxx>
> Fixes: 56f9eac05489 ("drm/i915/intel_i2c: use INDEX cycles for i2c read transactions")
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_i2c.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c
> index eb5827110d8f..165375cbef2f 100644
> --- a/drivers/gpu/drm/i915/intel_i2c.c
> +++ b/drivers/gpu/drm/i915/intel_i2c.c
> @@ -484,7 +484,7 @@ do_gmbus_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs, int num)
>
> for (; i < num; i += inc) {
> inc = 1;
> - if (gmbus_is_index_read(msgs, i, num)) {
> + if (gmbus_is_index_read(&msgs[i], i, num)) {
i is passed to gmbus_is_index_read() and used as an index into msgs. So
this should be accounted for right?
-Chris