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>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/i2c/algos/i2c-algo-bit.c b/drivers/i2c/algos/i2c-algo-bit.c
index 66bebfc81c22..c20530a98ca3 100644
--- 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;
         }