i2c-algo-bit: Be verbose on bus testing failure

If bus testing fails due to the bus being seen as busy, it might be
helpful for developers to know which line is unexpectedly low.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>

diff --git a/drivers/i2c/algos/i2c-algo-bit.c b/drivers/i2c/algos/i2c-algo-bit.c
index 66bebfc81c2244adc04c6d5674d1ee6b4029f279..c20530a98ca32d0aed7a833d315438344a1f43f9 100644 (file)
--- a/drivers/i2c/algos/i2c-algo-bit.c
+++ b/drivers/i2c/algos/i2c-algo-bit.c
@@ -250,7 +250,9 @@ static int test_bus(struct i2c_adapter *i2c_adap)
        sda = getsda(adap);
        scl = (adap->getscl == NULL) ? 1 : getscl(adap);
        if (!scl || !sda) {
-               printk(KERN_WARNING "%s: bus seems to be busy\n", name);
+               printk(KERN_WARNING
+                      "%s: bus seems to be busy (scl=%d, sda=%d)\n",
+                      name, scl, sda);
                goto bailout;
        }