3.13.11-ckt24 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>
commit e766f338a74200b8104b1165776b19f56e252834 upstream.
Newly introduced quirks infrastructure doesn't work for the devices behind
MUXes because MUX's master_xfer() calls parent's master_xfer() directly
without checking the quirks. Instead of duplicating check code in MUX just
call __i2c_transfer() instead. This has a side effect on tracing (messages
will appear on both MUX bus and parent bus), but maybe that's not bad at
the end.
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>
Tested-by: Łukasz Gemborowski <lukasz.gemborowski@xxxxxxxxx>
Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxxxxx>
Fixes: b7f625840267b1 ("i2c: add quirk checks to core")
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
drivers/i2c/i2c-mux.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i2c/i2c-mux.c b/drivers/i2c/i2c-mux.c
index 2d0847b..4bcefdb 100644
--- a/drivers/i2c/i2c-mux.c
+++ b/drivers/i2c/i2c-mux.c
@@ -50,7 +50,7 @@ static int i2c_mux_master_xfer(struct i2c_adapter *adap,
ret = priv->select(parent, priv->mux_priv, priv->chan_id);
if (ret >= 0)
- ret = parent->algo->master_xfer(parent, msgs, num);
+ ret = __i2c_transfer(parent, msgs, num);
if (priv->deselect)
priv->deselect(parent, priv->mux_priv, priv->chan_id);
--
1.9.1
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