Kernel panic within Smart Array hpsa driver when calling scsi_unmap_dma() routine

Issue

• kernel crashed and produced a core with hpsa driver in backtrace.

crash>   bt
PID: 11520  TASK: ffff8801e1882040  CPU: 0   COMMAND: "pmdtm"
 #0 [ffff880028203ac0] machine_kexec at ffffffff81038f3b
 #1 [ffff880028203b20] crash_kexec at ffffffff810c5af2
 #2 [ffff880028203bf0] oops_end at ffffffff8152ca50
 #3 [ffff880028203c20] die at ffffffff81010e0b
 #4 [ffff880028203c50] do_general_protection at ffffffff8152c552
 #5 [ffff880028203c80] general_protection at ffffffff8152bd25
    [exception RIP: scsi_dma_unmap+29]
    RIP: ffffffff8138b76d  RSP: ffff880028203d38  RFLAGS: 00010006
    RAX: 0020000000008000  RBX: ffff88070bab3cc0  RCX: 00000000ffffea00
    RDX: 0000000000000400  RSI: ffffea000289e6e8  RDI: ffff88070bab3cc0
    RBP: ffff880028203d38   R8: ffff8801065dc000   R9: 00007f3ad57f46b0
    R10: 0000000000000001  R11: 0000000000000000  R12: ffff880037ac00c0
    R13: ffff880037b00a00  R14: ffff881011b40000  R15: 0000000000000004
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0000
 #6 [ffff880028203d40] complete_scsi_command at ffffffffa0090bf4 [hpsa]
 #7 [ffff880028203e80] do_hpsa_intr_msi at ffffffffa00955e8 [hpsa]
 #8 [ffff880028203ed0] handle_IRQ_event at ffffffff810e6c60
 #9 [ffff880028203f20] handle_edge_irq at ffffffff810e95be
#10 [ffff880028203f60] handle_irq at ffffffff8100faf9
#11 [ffff880028203f80] do_IRQ at ffffffff8153251c
---  ---
#12 [ffff8801065ddf58] ret_from_intr at ffffffff8100b9d3
    RIP: 00007f3abf7a4e78  RSP: 00007f3ad57f46b0  RFLAGS: 00000202
    RAX: 0000000000000012  RBX: 00007f3ad57f48f0  RCX: 0000000000000002
    RDX: 0000000000000004  RSI: 00007f3ac40bf1d0  RDI: 00007f3ac40bf370
    RBP: ffffffff8100b9ce   R8: 00007f3ac4009308   R9: 0000000000000064
    R10: 0000000000000001  R11: 0000000000000000  R12: 0000000000000008
    R13: 0000000000002010  R14: 00007f3ac406e8f6  R15: 0000000000000000
    ORIG_RAX: ffffffffffffff46  CS: 0033  SS: 002b