I/O error and "ext4_find_entry: reading directory #2360839 offset 0" error during shutdown/reboot from megaraid_sas behavior change in RHEL 6.7

Issue

• I/O error during shutdown/reboot from megaraid_sas behavior change in RHEL 6.7
  • I/O error with kernel crash sometimes.

[  118.977438] sd 4:2:0:0: [sda]  Result: hostbyte=DID_NO_CONNECT driverbyte=DRI
VER_OK
[  118.978041] sd 4:2:0:0: [sda] CDB: Read(10): 28 00 19 46 46 c0 00 00 28 00
[  118.979370] end_request: I/O error, dev sda, sector 424036032
[  118.979717] sd 4:2:0:0: [sda]  Result: hostbyte=DID_NO_CONNECT driverbyte=DRI
VER_OK
[  118.980320] sd 4:2:0:0: [sda] CDB: Read(10): 28 00 19 46 46 e0 00 00 08 00
[  118.981647] end_request: I/O error, dev sda, sector 424036064
[  118.981963] init[1]: segfault at 7f3dd22ebe57 ip 00007f3dd22ebe57 sp 00007fff
b2467b28 error 14 in init[7fb094f1e000+23000]
[  118.982699] Kernel panic - not syncing: Attempted to kill init!
[  118.982998] Pid: 1, comm: init Not tainted 2.6.32-573.1.1.el6.x86_64 #1
[  118.983310] Call Trace:
[  118.983632]  [<ffffffff81537a84>] ? panic+0xa7/0x16f
[  118.983933]  [<ffffffff813364d6>] ? get_current_tty+0x66/0x70
[  118.984245]  [<ffffffff8107cd17>] ? do_exit+0x867/0x870
[  118.984553]  [<ffffffff8108ec3d>] ? __sigqueue_free+0x3d/0x50
[  118.984868]  [<ffffffff8107cd78>] ? do_group_exit+0x58/0xd0
[  118.985177]  [<ffffffff81092a26>] ? get_signal_to_deliver+0x1f6/0x460
[  118.985486]  [<ffffffff8100a285>] ? do_signal+0x75/0x870
[  118.985804]  [<ffffffff81199299>] ? free_bprm+0x59/0x60
[  118.986111]  [<ffffffff8100ab10>] ? do_notify_resume+0x90/0xc0
[  118.986419]  [<ffffffff8100bb5c>] ? retint_signal+0x48/0x8c

• I/O Error error without crash

 end_request: I/O error, dev sda, sector 1615900192
 end_request: I/O error, dev sda, sector 93367144
 EXT4-fs error (device dm-2): ext4_find_entry: reading directory #2360839 offset 0