usb: typec: intel_pmc_mux: Defer probe if SCU IPC isn't present

[ Upstream commit df9a825f330e76c72d1985bc9bdc4b8981e3d15f ]

If pmc_usb_probe is called before SCU IPC is registered, pmc_usb_probe
will fail.

Return -EPROBE_DEFER when pmc_usb_probe doesn't get SCU IPC device, so
the probe function can be called again after SCU IPC is initialized.

Signed-off-by: Tomasz Michalec <tmichalec@google.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20250610154058.1859812-1-tmichalec@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c
index 87e2c913060706736ae48a0bb628a0b188b6be14..a6936fc59d1e0d65e1e6041023a233d13f4cff34 100644 (file)
--- a/drivers/usb/typec/mux/intel_pmc_mux.c
+++ b/drivers/usb/typec/mux/intel_pmc_mux.c
@@ -667,7 +667,7 @@ static int pmc_usb_probe(struct platform_device *pdev)
 
        pmc->ipc = devm_intel_scu_ipc_dev_get(&pdev->dev);
        if (!pmc->ipc)
-               return -ENODEV;
+               return -EPROBE_DEFER;
 
        pmc->dev = &pdev->dev;