From: Anand Jain Date: Thu, 23 Jun 2016 12:54:07 +0000 (+0800) Subject: btrfs: make sure device is synced before return X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e2bf6e89b4c71ea08223f13a700cfd0b576f7e7a;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git btrfs: make sure device is synced before return An inconsistent behavior due to stale reads from the disk was reported mail-archive.com/linux-btrfs@vger.kernel.org/msg54188.html This patch will make sure devices are synced before return in the unmount thread. Signed-off-by: Anand Jain Signed-off-by: David Sterba --- diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index e54b3fe92e90..51bd3ee8e64f 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -870,6 +870,11 @@ static void btrfs_close_one_device(struct btrfs_device *device) if (device->missing) fs_devices->missing_devices--; + if (device->bdev && device->writeable) { + sync_blockdev(device->bdev); + invalidate_bdev(device->bdev); + } + new_device = btrfs_alloc_device(NULL, &device->devid, device->uuid); BUG_ON(IS_ERR(new_device)); /* -ENOMEM */