Locking the root adapter for __i2c_transfer will deadlock if the
device sits behind a mux-locked I2C mux. Switch to the finer-grained
i2c_lock_segment. If the device does not sit behind a mux-locked mux,
the two locking variants are equivalent.
Signed-off-by: Peter Rosin <peda@xxxxxxxxxx>
---
drivers/input/touchscreen/rohm_bu21023.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/input/touchscreen/rohm_bu21023.c b/drivers/input/touchscreen/rohm_bu21023.c
index bda0500c9b57..22d79db07234 100644
--- a/drivers/input/touchscreen/rohm_bu21023.c
+++ b/drivers/input/touchscreen/rohm_bu21023.c
@@ -304,7 +304,7 @@ static int rohm_i2c_burst_read(struct i2c_client *client, u8 start, void *buf,
msg[1].len = len;
msg[1].buf = buf;
- i2c_lock_adapter(adap);
+ i2c_lock_segment(adap);
for (i = 0; i < 2; i++) {
if (__i2c_transfer(adap, &msg[i], 1) < 0) {
@@ -313,7 +313,7 @@ static int rohm_i2c_burst_read(struct i2c_client *client, u8 start, void *buf,
}
}
- i2c_unlock_adapter(adap);
+ i2c_unlock_segment(adap);
return ret;
}
--
2.11.0
--
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