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kernel: mtd: ubi: avoid attaching "linux,ubi" mtd again

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"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 <yangshiji66@qq.com>
This commit is contained in:
Shiji Yang 2024-06-21 13:56:23 +00:00 committed by Daniel Golle
parent 7c32295b00
commit 007437c225
1 changed files with 8 additions and 2 deletions
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10
target/linux/generic/pending-6.6/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch
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@ -8,7 +8,7 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
--- 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 <daniel@makrotopia.org>
+{
+ 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 <daniel@makrotopia.org>
+ 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 <daniel@makrotopia.org>
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)
}
}