[PATCH Eoan] UBUNTU: SAUCE: powerpc/vio: drop bus_type from parent device

Thadeu Lima de Souza Cascardo cascardo at canonical.com
Fri Sep 27 14:41:53 UTC 2019

BugLink: https://bugs.launchpad.net/bugs/1845572

Commit df44b479654f62b478c18ee4d8bc4e9f897a9844 ("kobject: return error code if
writing /sys/.../uevent fails") started returning failure when writing to

This causes an early udevadm trigger to fail. On some installer versions of
Ubuntu, this will cause init to exit, thus panicing the system very early
during boot.

Removing the bus_type from the parent device will remove some of the extra
empty files from /sys/devices/vio/, but will keep the rest of the layout for
vio devices, keeping them under /sys/devices/vio/.

It has been tested that uevents for vio devices don't change after this fix,
they still contain MODALIAS.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo at canonical.com>

This has been submitted upstream just now.

 arch/powerpc/platforms/pseries/vio.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/vio.c b/arch/powerpc/platforms/pseries/vio.c
index 6601b9d404dc..d570d5494f30 100644
--- a/arch/powerpc/platforms/pseries/vio.c
+++ b/arch/powerpc/platforms/pseries/vio.c
@@ -36,7 +36,6 @@ static struct vio_dev vio_bus_device  = { /* fake "parent" device */
 	.name = "vio",
 	.type = "",
 	.dev.init_name = "vio",
-	.dev.bus = &vio_bus_type,

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