In case an i2c_msg, which is currently work-in-progress, has more bytes
to be written, we need to set STATUS_WRITE_IN_PROGRESS _and_ exit from
the msg_write_idx-search loop. Otherwise, we'll overtake the current
index without waiting for transmission completed.
Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi@xxxxxxxxx>
---
drivers/i2c/busses/i2c-designware.c | 17 +++++++++++------
1 files changed, 11 insertions(+), 6 deletions(-)
diff --git a/drivers/i2c/busses/i2c-designware.c b/drivers/i2c/busses/i2c-designware.c
index 26efd3a..6bfdc5f 100644
--- a/drivers/i2c/busses/i2c-designware.c
+++ b/drivers/i2c/busses/i2c-designware.c
@@ -386,17 +386,22 @@ i2c_dw_xfer_msg(struct dw_i2c_dev *dev)
dev->base + DW_IC_DATA_CMD);
tx_limit--; buf_len--;
}
+
+ dev->tx_buf_len = buf_len;
+
+ /* more bytes to be written? */
+ if (buf_len > 0) {
+ dev->status |= STATUS_WRITE_IN_PROGRESS;
+ break;
+ } else {
+ dev->status &= ~STATUS_WRITE_IN_PROGRESS;
+ }
}
intr_mask = DW_IC_INTR_STOP_DET | DW_IC_INTR_TX_ABRT;
- if (buf_len > 0) { /* more bytes to be written */
+ if (buf_len > 0)
intr_mask |= DW_IC_INTR_TX_EMPTY;
- dev->status |= STATUS_WRITE_IN_PROGRESS;
- } else
- dev->status &= ~STATUS_WRITE_IN_PROGRESS;
writel(intr_mask, dev->base + DW_IC_INTR_MASK);
-
- dev->tx_buf_len = buf_len;
}
static void
--
1.6.5
