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kernel: fix deferred mtdblock registration

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Check if gendisk is already up instead of trying to figure out parent
mtd device (which didn't work well).

Reported-by: DENG Qingfang <dqfext@gmail.com>
Reported-by: Koen Vandeputte <koen.vandeputte@citymesh.com>
Fixes: 2809d00007 ("kernel: support FIT partition parser on mtdblock devices")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This commit is contained in:
Daniel Golle 2021-04-12 21:40:35 +01:00
parent 9aa66b8ce7
commit e9c8c834de
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GPG key ID: 5A8F39C31C3217CA
1 changed files with 7 additions and 12 deletions
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19
target/linux/generic/hack-5.10/402-mtd-blktrans-call-add-disks-after-mtd-device.patch
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@ -39,24 +39,19 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
return 0; return 0;
error4: error4:
kfree(new->tag_set); kfree(new->tag_set);
@@ -475,6 +468,32 @@ error1: @@ -475,6 +468,27 @@ error1:
return ret; return ret;
} }
+void register_mtd_blktrans_devs(struct mtd_info *mtd) +void register_mtd_blktrans_devs(void)
+{ +{
+ struct mtd_blktrans_ops *tr; + struct mtd_blktrans_ops *tr;
+ struct mtd_blktrans_dev *dev, *next; + struct mtd_blktrans_dev *dev, *next;
+ struct mtd_info *top_mtd;
+ int ret; + int ret;
+ +
+ list_for_each_entry(tr, &blktrans_majors, list) { + list_for_each_entry(tr, &blktrans_majors, list) {
+ list_for_each_entry_safe(dev, next, &tr->devs, list) { + list_for_each_entry_safe(dev, next, &tr->devs, list) {
+ top_mtd = dev->mtd; + if (dev->disk->flags & GENHD_FL_UP)
+ while (top_mtd->parent)
+ top_mtd = top_mtd->parent;
+
+ if (mtd->index != top_mtd->index)
+ continue; + continue;
+ +
+ device_add_disk(&dev->mtd->dev, dev->disk, NULL); + device_add_disk(&dev->mtd->dev, dev->disk, NULL);
@ -86,18 +81,18 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
register_reboot_notifier(&mtd->reboot_notifier); register_reboot_notifier(&mtd->reboot_notifier);
} }
+ register_mtd_blktrans_devs(mtd); + register_mtd_blktrans_devs();
+ +
out: out:
if (ret && device_is_registered(&mtd->dev)) if (ret && device_is_registered(&mtd->dev))
del_mtd_device(mtd); del_mtd_device(mtd);
--- a/include/linux/mtd/blktrans.h --- a/include/linux/mtd/blktrans.h
+++ b/include/linux/mtd/blktrans.h +++ b/include/linux/mtd/blktrans.h
@@ -76,6 +76,7 @@ extern int deregister_mtd_blktrans(struc @@ -76,6 +76,6 @@ extern int deregister_mtd_blktrans(struc
extern int add_mtd_blktrans_dev(struct mtd_blktrans_dev *dev); extern int add_mtd_blktrans_dev(struct mtd_blktrans_dev *dev);
extern int del_mtd_blktrans_dev(struct mtd_blktrans_dev *dev); extern int del_mtd_blktrans_dev(struct mtd_blktrans_dev *dev);
extern int mtd_blktrans_cease_background(struct mtd_blktrans_dev *dev); extern int mtd_blktrans_cease_background(struct mtd_blktrans_dev *dev);
+extern void register_mtd_blktrans_devs(struct mtd_info *mtd); -
+extern void register_mtd_blktrans_devs(void);
#endif /* __MTD_TRANS_H__ */ #endif /* __MTD_TRANS_H__ */