ext4: make ext4_split_extent() handle error correctly
ext4: make ext4_split_extent() handle error correctly

Signed-off-by: Yongqiang Yang <cc47c8d45a0a3c6300393e2d0c4f6e661d0cfdb0@gmail.com>
Signed-off-by: "Theodore Ts'o" <4ed386e0495d3e109932df055831d9ec2f824927@mit.edu>
Reviewed-by: Mingming Cao <89e10773c335857ac236dfae53fd89ae361ca3d4@us.ibm.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs