Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI updates from James Bottomley:
 "First round of SCSI updates for the 4.6+ merge window.

  This batch includes the usual quota of driver updates (bnx2fc, mp3sas,
  hpsa, ncr5380, lpfc, hisi_sas, snic, aacraid, megaraid_sas).  There's
  also a multiqueue update for scsi_debug, assorted bug fixes and a few
  other minor updates (refactor of scsi_sg_pools into generic code, alua
  and VPD updates, and struct timeval conversions)"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (138 commits)
  mpt3sas: Used "synchronize_irq()"API to synchronize timed-out IO & TMs
  mpt3sas: Set maximum transfer length per IO to 4MB for VDs
  mpt3sas: Updating mpt3sas driver version to 13.100.00.00
  mpt3sas: Fix initial Reference tag field for 4K PI drives.
  mpt3sas: Handle active cable exception event
  mpt3sas: Update MPI header to 2.00.42
  Revert "lpfc: Delete unnecessary checks before the function call mempool_destroy"
  eata_pio: missing break statement
  hpsa: Fix type ZBC conditional checks
  scsi_lib: Decode T10 vendor IDs
  scsi_dh_alua: do not fail for unknown VPD identification
  scsi_debug: use locally assigned naa
  scsi_debug: uuid for lu name
  scsi_debug: vpd and mode page work
  scsi_debug: add multiple queue support
  bfa: fix bfa_fcb_itnim_alloc() error handling
  megaraid_sas: Downgrade two success messages to info
  cxlflash: Fix to resolve dead-lock during EEH recovery
  scsi_debug: rework resp_report_luns
  scsi_debug: use pdt constants
  ...

1 files changed, 35 insertions, 4 deletions

diff --git a/drivers/scsi/aacraid/commsup.c b/drivers/scsi/aacraid/commsup.c
index 511bbc575062..0aeecec1f5ea 100644
--- a/drivers/scsi/aacraid/commsup.c
+++ b/drivers/scsi/aacraid/commsup.c
@@ -637,10 +637,10 @@ int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
 					}
 					return -EFAULT;
 				}
-				/* We used to udelay() here but that absorbed
-				 * a CPU when a timeout occured. Not very
-				 * useful. */
-				cpu_relax();
+				/*
+				 * Allow other processes / CPUS to use core
+				 */
+				schedule();
 			}
 		} else if (down_interruptible(&fibptr->event_wait)) {
 			/* Do nothing ... satisfy
@@ -901,6 +901,31 @@ void aac_printf(struct aac_dev *dev, u32 val)
 	memset(cp, 0, 256);
 }
 
+static inline int aac_aif_data(struct aac_aifcmd *aifcmd, uint32_t index)
+{
+	return le32_to_cpu(((__le32 *)aifcmd->data)[index]);
+}
+
+
+static void aac_handle_aif_bu(struct aac_dev *dev, struct aac_aifcmd *aifcmd)
+{
+	switch (aac_aif_data(aifcmd, 1)) {
+	case AifBuCacheDataLoss:
+		if (aac_aif_data(aifcmd, 2))
+			dev_info(&dev->pdev->dev, "Backup unit had cache data loss - [%d]\n",
+			aac_aif_data(aifcmd, 2));
+		else
+			dev_info(&dev->pdev->dev, "Backup Unit had cache data loss\n");
+		break;
+	case AifBuCacheDataRecover:
+		if (aac_aif_data(aifcmd, 2))
+			dev_info(&dev->pdev->dev, "DDR cache data recovered successfully - [%d]\n",
+			aac_aif_data(aifcmd, 2));
+		else
+			dev_info(&dev->pdev->dev, "DDR cache data recovered successfully\n");
+		break;
+	}
+}
 
 /**
  *	aac_handle_aif		-	Handle a message from the firmware
@@ -1154,6 +1179,8 @@ static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 				  ADD : DELETE;
 				break;
 			}
+			case AifBuManagerEvent:
+				aac_handle_aif_bu(dev, aifcmd);
 			break;
 		}
 
@@ -1996,6 +2023,10 @@ int aac_command_thread(void *data)
 		if (difference <= 0)
 			difference = 1;
 		set_current_state(TASK_INTERRUPTIBLE);
+
+		if (kthread_should_stop())
+			break;
+
 		schedule_timeout(difference);
 
 		if (kthread_should_stop())