From f3cd0131b5ca3c886c8e745628fcf61cae4c4b06 Mon Sep 17 00:00:00 2001 From: Shiji Yang Date: Fri, 21 Jun 2024 13:56:23 +0000 Subject: [PATCH] kernel: mtd: ubi: avoid attaching "linux,ubi" mtd again "linux,ubi" compatible MTD device can be automatically attached early since commit fc153aa8d94f. Therefore, there is no need to attach MTD devices named "ubi" or "data" again. Signed-off-by: Shiji Yang --- ...o-attach-mtd-device-named-ubi-or-data-on-boot.patch | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/target/linux/generic/pending-6.6/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch b/target/linux/generic/pending-6.6/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch index 6405865c459e7e..defde3f4269c21 100644 --- a/target/linux/generic/pending-6.6/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch +++ b/target/linux/generic/pending-6.6/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch @@ -8,7 +8,7 @@ Signed-off-by: Daniel Golle --- a/drivers/mtd/ubi/build.c +++ b/drivers/mtd/ubi/build.c -@@ -1258,6 +1258,74 @@ static struct mtd_notifier ubi_mtd_notif +@@ -1258,6 +1258,80 @@ static struct mtd_notifier ubi_mtd_notif .remove = ubi_notify_remove, }; @@ -21,6 +21,7 @@ Signed-off-by: Daniel Golle +{ + int err; + struct mtd_info *mtd; ++ struct device_node *np; + loff_t offset = 0; + size_t len; + char magic[4]; @@ -33,6 +34,11 @@ Signed-off-by: Daniel Golle + if (IS_ERR(mtd)) + return; + ++ /* skip "linux,ubi" mtd as it has already been attached */ ++ np = mtd_get_of_node(mtd); ++ if (of_device_is_compatible(np, "linux,ubi")) ++ goto cleanup; ++ + /* get the first not bad block */ + if (mtd_can_have_bb(mtd)) + while (mtd_block_isbad(mtd, offset)) { @@ -83,7 +89,7 @@ Signed-off-by: Daniel Golle static int __init ubi_init_attach(void) { int err, i, k; -@@ -1308,6 +1376,12 @@ static int __init ubi_init_attach(void) +@@ -1308,6 +1382,12 @@ static int __init ubi_init_attach(void) } }