From: Jeff Layton Date: Thu, 6 Jul 2017 11:02:21 +0000 (-0400) Subject: fs: check for writeback errors after syncing out buffers in generic_file_fsync X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=dac257f7419c732be3e491bbbb568a82df60208a;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git fs: check for writeback errors after syncing out buffers in generic_file_fsync ext2 currently does a test+clear of the AS_EIO flag, which is is problematic for some coming changes. What we really need to do instead is call filemap_check_errors in __generic_file_fsync after syncing out the buffers. That will be sufficient for this case, and help other callers detect these errors properly as well. With that, we don't need to twiddle it in ext2. Suggested-by: Jan Kara Signed-off-by: Jeff Layton Reviewed-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Matthew Wilcox --- diff --git a/fs/ext2/file.c b/fs/ext2/file.c index b21891a6bfca..d34d32bdc944 100644 --- a/fs/ext2/file.c +++ b/fs/ext2/file.c @@ -174,15 +174,12 @@ int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync) { int ret; struct super_block *sb = file->f_mapping->host->i_sb; - struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping; ret = generic_file_fsync(file, start, end, datasync); - if (ret == -EIO || test_and_clear_bit(AS_EIO, &mapping->flags)) { + if (ret == -EIO) /* We don't really know where the IO error happened... */ ext2_error(sb, __func__, "detected IO error when writing metadata buffers"); - ret = -EIO; - } return ret; } diff --git a/fs/libfs.c b/fs/libfs.c index a04395334bb1..1b76f29799bf 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -991,7 +991,9 @@ int __generic_file_fsync(struct file *file, loff_t start, loff_t end, out: inode_unlock(inode); - return ret; + /* must call this unconditionally as it clears AS_* error flags */ + err = filemap_check_errors(inode->i_mapping); + return ret ? ret : err; } EXPORT_SYMBOL(__generic_file_fsync);