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-rw-r--r--drivers/i2c/i2c-slave-testunit.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/i2c/i2c-slave-testunit.c b/drivers/i2c/i2c-slave-testunit.c
index a49642bbae4b..ca43e98cae1b 100644
--- a/drivers/i2c/i2c-slave-testunit.c
+++ b/drivers/i2c/i2c-slave-testunit.c
@@ -118,9 +118,12 @@ static int i2c_slave_testunit_slave_cb(struct i2c_client *client,
queue_delayed_work(system_long_wq, &tu->worker,
msecs_to_jiffies(10 * tu->regs[TU_REG_DELAY]));
}
- fallthrough;
+ break;
case I2C_SLAVE_WRITE_REQUESTED:
+ if (test_bit(TU_FLAG_IN_PROCESS, &tu->flags))
+ return -EBUSY;
+
memset(tu->regs, 0, TU_NUM_REGS);
tu->reg_idx = 0;
break;