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i2c: busses: rk3x: Sync with i2c->msg with idle state

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Ensure that the I2C->msg is synchronized with the idle state,
and the I2C->msg may still be used in the stop phase, need to
wait until the I2C transfer is completed, and then set I2C->msg
to be null.

Signed-off-by: David Wu <david.wu@rock-chips.com>
Change-Id: I8a8e8c1e72f28cf4c95fe4efb559177056f483d1
This commit is contained in:
David Wu
2023-12-22 11:36:49 +08:00
committed by Tao Huang
parent 6272868cd8
commit 2b42b3527e
1 changed files with 2 additions and 2 deletions
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4
drivers/i2c/busses/i2c-rk3x.c
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@@ -387,7 +387,6 @@ static void rk3x_i2c_stop(struct rk3x_i2c *i2c, int error)
unsigned int ctrl;
i2c->processed = 0;
i2c->msg = NULL;
i2c->error = error;
if (i2c->is_last_msg) {
@@ -404,6 +403,7 @@ static void rk3x_i2c_stop(struct rk3x_i2c *i2c, int error)
/* Signal rk3x_i2c_xfer to start the next message. */
i2c->busy = false;
i2c->state = STATE_IDLE;
i2c->msg = NULL;
/*
* The HW is actually not capable of REPEATED START. But we can
@@ -572,7 +572,6 @@ static void rk3x_i2c_handle_stop(struct rk3x_i2c *i2c, unsigned int ipd)
}
i2c->processed = 0;
i2c->msg = NULL;
}
/* ack interrupt */
@@ -587,6 +586,7 @@ static void rk3x_i2c_handle_stop(struct rk3x_i2c *i2c, unsigned int ipd)
i2c->busy = false;
i2c->state = STATE_IDLE;
i2c->msg = NULL;
/* signal rk3x_i2c_xfer that we are finished */
rk3x_i2c_wake_up(i2c);