scsi: upstream arcmsr-1.20.00.15

Subject: [PATCH] scsi: upstream arcmsr-1.20.00.15-71224
From: Nick Cheng <[email protected]>
Description:
*** add arcmsr_enable_eoi_mode()and readl(reg->iop2drv_doorbell_reg) in arcmsr_handle_hbb_isr() on adapter Type B in case of the doorbell interrupt clearance is cached
*** add conditional declaration for arcmsr_pci_error_detected() and arcmsr_pci_slot_reset
*** check if the sg list member number exceeds arcmsr default limit in arcmsr_build_ccb()
*** change the returned value type of arcmsr_build_ccb()from "void" to "int"
returns FAILED in arcmsr_queue_command()
*** modify arcmsr_drain_donequeue() to ignore unknown command and let kernel process command timeout. This could handle IO request violating maximum segments, i.e. Linux XFS over DM-CRYPT. Thanks to Milan Broz's comments <[email protected]>
*** fix the release of dma memory for type B in arcmsr_free_ccb_pool() *** fix the arcmsr_polling_hbb_ccbdone()