[PATCH v2 1/2] i3c: master: fixes i3c bus driver probe failure if no i3c device attached

Frank Li
2023-08-30T14:17:56Z

In i3c_master_bus_init()
{ ...
ret = i3c_master_rstdaa_locked(master, I3C_BROADCAST_ADDR);
if (ret && ret != I3C_ERROR_M2)
^^^ // it is enum i3c_error_code
...
}

In dw-i3c-master.c implementation:
dw_i3c_ccc_set()
{ ...
ret = xfer->ret;
if (xfer->cmds[0].error == RESPONSE_ERROR_IBA_NACK)
ccc->err = I3C_ERROR_M2;

dw_i3c_master_free_xfer(xfer);

return ret;
}

Return enum i3c_error_code when error happen in i3c_master_rstdaa_locked().

Cc: stable@vger.kernel.org
Fixes: 3a379bbcea0a ("i3c: Add core I3C infrastructure")
Signed-off-by: Frank Li <Frank.Li@nxp.com>
---

Notes:
Change from v1 to v2:
- cc stable

drivers/i3c/master.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index 08aeb69a78003..00a82f3ab9ac0 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -783,6 +783,9 @@ static int i3c_master_rstdaa_locked(struct i3c_master_controller *master,
ret = i3c_master_send_ccc_cmd_locked(master, &cmd);
i3c_ccc_cmd_dest_cleanup(&dest);

+ if (ret)
+ ret = cmd.err;
+
return ret;
}

--
2.34.1