[PATCH 1/2] mtd: ubi: wire-up parent MTD device

Daniel Golle
2022-12-22T19:33:28Z

Wire up the device parent pointer of UBI devices to their lower MTD
device, typically an MTD partition or whole-chip device.

The most noticeable change is that in sysfs, previously ubi devices
would be could in /sys/devices/virtual/ubi while after this change they
would be correctly attached to their parent MTD device, e.g.

/sys/devices/platform/1100d000.spi/spi_master/spi1/spi1.0/mtd/mtd2/ubi0.

Locating UBI devices using /sys/class/ubi/ of course still works as
well.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
drivers/mtd/ubi/build.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 5e90a4423b699..0904eb40c95fa 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -915,6 +915,7 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
ubi->dev.release = dev_release;
ubi->dev.class = &ubi_class;
ubi->dev.groups = ubi_dev_groups;
+ ubi->dev.parent = &mtd->dev;

ubi->mtd = mtd;
ubi->ubi_num = ubi_num;
--
2.39.0