udf: Use IS_ERR when loading metadata mirror file entry
Currently when udf_get_pblock_meta25() fails to map a block using the primary metadata file, it will attempt to load the mirror file entry by calling udf_find_metadata_inode_efe(). That function will return a ERR_PTR if it fails, but the return value is only checked against NULL. Test the return value using IS_ERR() and change it to NULL if needed. Signed-off-by: Alden Tondettar <alden.tondettar@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
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@ -326,6 +326,8 @@ uint32_t udf_get_pblock_meta25(struct super_block *sb, uint32_t block,
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if (!(mdata->s_flags & MF_MIRROR_FE_LOADED)) {
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mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb,
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mdata->s_mirror_file_loc, map->s_partition_num);
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if (IS_ERR(mdata->s_mirror_fe))
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mdata->s_mirror_fe = NULL;
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mdata->s_flags |= MF_MIRROR_FE_LOADED;
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}
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