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| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2024-07-11 15:08:19 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-07-18 14:21:26 +0300 |
| commit | bc6632549c015467fc471c337015015fa03368a7 (patch) | |
| tree | be6561e1e5d82e62f28f92478baba202be6dfd16 | |
| parent | 4d2d0491b3b126b11d9b0a7973dfc734f02af470 (diff) | |
| download | linux-bc6632549c015467fc471c337015015fa03368a7.tar.xz | |
i2c: testunit: avoid re-issued work after read message
[ Upstream commit 119736c7af442ab398dbb806865988c98ef60d46 ]
The to-be-fixed commit rightfully prevented that the registers will be
cleared. However, the index must be cleared. Otherwise a read message
will re-issue the last work. Fix it and add a comment describing the
situation.
Fixes: c422b6a63024 ("i2c: testunit: don't erase registers after STOP")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/i2c/i2c-slave-testunit.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-slave-testunit.c b/drivers/i2c/i2c-slave-testunit.c index ca43e98cae1b..23a11e4e9256 100644 --- a/drivers/i2c/i2c-slave-testunit.c +++ b/drivers/i2c/i2c-slave-testunit.c @@ -118,6 +118,13 @@ 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])); } + + /* + * Reset reg_idx to avoid that work gets queued again in case of + * STOP after a following read message. But do not clear TU regs + * here because we still need them in the workqueue! + */ + tu->reg_idx = 0; break; case I2C_SLAVE_WRITE_REQUESTED: |