3.16-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alexandru M Stan <ams...@chromium.org>
commit cf27020d2f253bac6457d6833b97141030f0122a upstream.
i2cdetect -q was broken (everything was a false positive, and no transfers were
actually being sent over i2c). The way it works is by sending a 0 length write
request and checking for NACK. This patch fixes the 0 length writes and actually
sends them.
Reported-by: Doug Anderson <diand...@chromium.org>
Signed-off-by: Alexandru M Stan <ams...@chromium.org>
Tested-by: Doug Anderson <diand...@chromium.org>
Tested-by: Max Schwarz <max.schw...@online.de>
Signed-off-by: Wolfram Sang <w...@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/i2c/busses/i2c-rk3x.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/i2c/busses/i2c-rk3x.c
+++ b/drivers/i2c/busses/i2c-rk3x.c
@@ -238,7 +238,7 @@ static void rk3x_i2c_fill_transmit_buf(s
for (i = 0; i < 8; ++i) {
val = 0;
for (j = 0; j < 4; ++j) {
- if (i2c->processed == i2c->msg->len)
+ if ((i2c->processed == i2c->msg->len) && (cnt != 0))
break;
if (i2c->processed == 0 && cnt == 0)
--
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