Issue

• RHEL 6.0 server panics with the following message:

WARNING: at drivers/ata/libata-core.c:5189 ata_qc_issue+0x32a/0x340() 

• RHEL 5.5 server panics with following error message:

kernel: BUG: warning at drivers/ata/libata-core.c:4933/ata_qc_issue()
kernel: 
kernel: Call Trace:
kernel:  [<ffffffff880ca7bc>] :libata:ata_qc_issue+0x102/0x58e
kernel:  [<ffffffff880755a6>] :scsi_mod:scsi_done+0x0/0x18
kernel:  [<ffffffff880d119a>] :libata:ata_scsi_pass_thru+0x0/0x254
kernel:  [<ffffffff880cf0df>] :libata:ata_scsi_translate+0x140/0x16d
kernel:  [<ffffffff880755a6>] :scsi_mod:scsi_done+0x0/0x18
kernel:  [<ffffffff88101f0b>] :libsas:sas_queuecommand+0x86/0x288
kernel:  [<ffffffff8001cb9f>] __mod_timer+0x100/0x10f
kernel:  [<ffffffff88075c61>] :scsi_mod:scsi_dispatch_cmd+0x26e/0x2ff
kernel:  [<ffffffff8807b174>] :scsi_mod:scsi_request_fn+0x2c1/0x390
kernel:  [<ffffffff80143dc4>] elv_insert+0xac/0x1c0
kernel:  [<ffffffff801459c4>] blk_execute_rq_nowait+0x7e/0x9a
kernel:  [<ffffffff80145a70>] blk_execute_rq+0x90/0xc0
kernel:  [<ffffffff80149443>] sg_io+0x258/0x356
kernel:  [<ffffffff801499c8>] scsi_cmd_ioctl+0x1d2/0x3b5
kernel:  [<ffffffff8027e15f>] unix_dgram_sendmsg+0x44e/0x4e0
kernel:  [<ffffffff8000d3e9>] dput+0x2c/0x114
kernel:  [<ffffffff880a90a0>] :sd_mod:sd_ioctl+0x93/0xc2
kernel:  [<ffffffff801474e1>] blkdev_driver_ioctl+0x5d/0x72
kernel:  [<ffffffff80147b32>] blkdev_ioctl+0x63c/0x697
kernel:  [<ffffffff8002e511>] __wake_up+0x38/0x4f
kernel:  [<ffffffff800e589e>] block_ioctl+0x1b/0x1f
kernel:  [<ffffffff80042489>] do_ioctl+0x21/0x6b
kernel:  [<ffffffff800304d6>] vfs_ioctl+0x457/0x4b9
kernel:  [<ffffffff800b878c>] audit_syscall_entry+0x180/0x1b3
kernel:  [<ffffffff8004cbb7>] sys_ioctl+0x59/0x78
kernel:  [<ffffffff8005e28d>] tracesys+0xd5/0xe0