| Message ID | 20240627111445.29751-6-wsa+renesas@sang-engineering.com |
|---|---|
| State | New |
| Headers | show |
| Series | i2c: testunit: regression fixes | expand |
Hi Wolfram, On Thu, Jun 27, 2024 at 01:14:48PM GMT, Wolfram Sang wrote: > When clearing registers on new write requests was added, the protection > for currently running commands was missed leading to concurrent access > to the testunit registers. Check the flag beforehand. > > Fixes: b39ab96aa894 ("i2c: testunit: add support for block process calls") > Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Andi Shyti <andi.shyti@kernel.org> Thanks, Andi
On Thu, Jun 27, 2024 at 01:14:48PM +0200, Wolfram Sang wrote: > When clearing registers on new write requests was added, the protection > for currently running commands was missed leading to concurrent access > to the testunit registers. Check the flag beforehand. > > Fixes: b39ab96aa894 ("i2c: testunit: add support for block process calls") > Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Applied to for-current, thanks!
diff --git a/drivers/i2c/i2c-slave-testunit.c b/drivers/i2c/i2c-slave-testunit.c index a5dcbc3c2c14..ca43e98cae1b 100644 --- a/drivers/i2c/i2c-slave-testunit.c +++ b/drivers/i2c/i2c-slave-testunit.c @@ -121,6 +121,9 @@ static int i2c_slave_testunit_slave_cb(struct i2c_client *client, 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;
When clearing registers on new write requests was added, the protection for currently running commands was missed leading to concurrent access to the testunit registers. Check the flag beforehand. Fixes: b39ab96aa894 ("i2c: testunit: add support for block process calls") Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> --- drivers/i2c/i2c-slave-testunit.c | 3 +++ 1 file changed, 3 insertions(+)