Commit 11ac8ef8 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: avoid null pointer exception in dcc_info 



If dcc_info is not set yet, we can get null pointer panic.

Reviewed-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent b460866d

fs/f2fs/f2fs.h

+10 −3
Original line number Diff line number Diff line
@@ -2161,10 +2161,17 @@ static inline bool is_idle(struct f2fs_sb_info *sbi, int type) 
		get_pages(sbi, F2FS_RD_META) || get_pages(sbi, F2FS_WB_DATA) ||

		get_pages(sbi, F2FS_WB_CP_DATA) ||

		get_pages(sbi, F2FS_DIO_READ) ||

		get_pages(sbi, F2FS_DIO_WRITE) ||

		atomic_read(&SM_I(sbi)->dcc_info->queued_discard) ||

		get_pages(sbi, F2FS_DIO_WRITE))

		return false;



	if (SM_I(sbi) && SM_I(sbi)->dcc_info &&

			atomic_read(&SM_I(sbi)->dcc_info->queued_discard))

		return false;



	if (SM_I(sbi) && SM_I(sbi)->fcc_info &&

			atomic_read(&SM_I(sbi)->fcc_info->queued_flush))

		return false;



	return f2fs_time_over(sbi, type);

}