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ubi: Fix race condition between ubi device creation and udev 

Install the UBI device object before we arm sysfs.
Otherwise udev tries to read sysfs attributes before UBI is ready and
udev rules will not match.

Cc: <stable@vger.kernel.org>
Signed-off-by: Iosif Harutyunov <iharutyunov@sonicwall.com>
[rw: massaged commit message]
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Iosif Harutyunov 2016-07-22 23:22:42 +00:00 committed by Richard Weinberger
parent 380bc8b710
commit 714fb87e8b
1 changed files with 4 additions and 1 deletions
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5
drivers/mtd/ubi/build.c
View File

@ -992,6 +992,9 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
goto out_detach;
}
/* Make device "available" before it becomes accessible via sysfs */
ubi_devices[ubi_num] = ubi;
err = uif_init(ubi, &ref);
if (err)
goto out_detach;
@ -1036,7 +1039,6 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
wake_up_process(ubi->bgt_thread);
spin_unlock(&ubi->wl_lock);
ubi_devices[ubi_num] = ubi;
ubi_notify_all(ubi, UBI_VOLUME_ADDED, NULL);
return ubi_num;
@ -1047,6 +1049,7 @@ out_uif:
ubi_assert(ref);
uif_close(ubi);
out_detach:
ubi_devices[ubi_num] = NULL;
ubi_wl_close(ubi);
ubi_free_internal_volumes(ubi);
vfree(ubi->vtbl);