ext4: fix error handling in ext4_ind_get_blocks()
When an error happened in ext4_splice_branch we failed to notice that in ext4_ind_get_blocks and mapped the buffer anyway. Fix the problem by checking for error properly. Signed-off-by: NJan Kara <jack@suse.cz> Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu> Cc: stable@kernel.org
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