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Subject[PATCH] sunxi-rsb: Include OF based modalias in device uevent
Date
Include the OF-based modalias in the uevent sent when registering devices
on the sunxi RSB bus, so that user space has a chance to autoload the
kernel module for the device.

Fixes a regression caused by commit 3f241bfa60bd ("arm64: allwinner: a64:
pine64: Use dcdc1 regulator for mmc0"). When the axp20x-rsb module for
the AXP803 PMIC is built as a module, it is not loaded and the system
ends up with an disfunctional MMC controller.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
---
drivers/bus/sunxi-rsb.c | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/drivers/bus/sunxi-rsb.c b/drivers/bus/sunxi-rsb.c
index 328ca93781cf..37cb57244cbe 100644
--- a/drivers/bus/sunxi-rsb.c
+++ b/drivers/bus/sunxi-rsb.c
@@ -173,11 +173,24 @@ static int sunxi_rsb_device_remove(struct device *dev)
return drv->remove(to_sunxi_rsb_device(dev));
}

+static int sunxi_rsb_device_uevent(struct device *dev,
+ struct kobj_uevent_env *env)
+{
+ int ret;
+
+ ret = of_device_uevent_modalias(dev, env);
+ if (ret != -ENODEV)
+ return ret;
+
+ return 0;
+}
+
static struct bus_type sunxi_rsb_bus = {
.name = RSB_CTRL_NAME,
.match = sunxi_rsb_device_match,
.probe = sunxi_rsb_device_probe,
.remove = sunxi_rsb_device_remove,
+ .uevent = sunxi_rsb_device_uevent,
};

static void sunxi_rsb_dev_release(struct device *dev)
--
2.15.0
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