1 files changed, 88 insertions, 4 deletions

diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index 7956a10f9488..e9c6a6047a00 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -63,6 +63,8 @@
 #ifdef CONFIG_MTRR
 #include <asm/mtrr.h>
 #endif
+#include <linux/kthread.h>
+#include <scsi/scsi_host.h>
 
 #include "mptbase.h"
 #include "lsi/mpi_log_fc.h"
@@ -323,6 +325,32 @@ mpt_is_discovery_complete(MPT_ADAPTER *ioc)
         return rc;
 }
 
+
+/**
+ *  mpt_remove_dead_ioc_func - kthread context to remove dead ioc
+ * @arg: input argument, used to derive ioc
+ *
+ * Return 0 if controller is removed from pci subsystem.
+ * Return -1 for other case.
+ */
+static int mpt_remove_dead_ioc_func(void *arg)
+{
+        MPT_ADAPTER *ioc = (MPT_ADAPTER *)arg;
+        struct pci_dev *pdev;
+
+        if ((ioc == NULL))
+                return -1;
+
+        pdev = ioc->pcidev;
+        if ((pdev == NULL))
+                return -1;
+
+        pci_remove_bus_device(pdev);
+        return 0;
+}
+
+
+
 /**
  *      mpt_fault_reset_work - work performed on workq after ioc fault
  *      @work: input argument, used to derive ioc
@@ -336,12 +364,45 @@ mpt_fault_reset_work(struct work_struct *work)
         u32              ioc_raw_state;
         int              rc;
         unsigned long    flags;
+        MPT_SCSI_HOST   *hd;
+        struct task_struct *p;
 
         if (ioc->ioc_reset_in_progress || !ioc->active)
                 goto out;
 
+
         ioc_raw_state = mpt_GetIocState(ioc, 0);
-        if ((ioc_raw_state & MPI_IOC_STATE_MASK) == MPI_IOC_STATE_FAULT) {
+        if ((ioc_raw_state & MPI_IOC_STATE_MASK) == MPI_IOC_STATE_MASK) {
+                printk(MYIOC_s_INFO_FMT "%s: IOC is non-operational !!!!\n",
+                    ioc->name, __func__);
+
+                /*
+                 * Call mptscsih_flush_pending_cmds callback so that we
+                 * flush all pending commands back to OS.
+                 * This call is required to aovid deadlock at block layer.
+                 * Dead IOC will fail to do diag reset,and this call is safe
+                 * since dead ioc will never return any command back from HW.
+                 */
+                hd = shost_priv(ioc->sh);
+                ioc->schedule_dead_ioc_flush_running_cmds(hd);
+
+                /*Remove the Dead Host */
+                p = kthread_run(mpt_remove_dead_ioc_func, ioc,
+                                "mpt_dead_ioc_%d", ioc->id);
+                if (IS_ERR(p))  {
+                        printk(MYIOC_s_ERR_FMT
+                                "%s: Running mpt_dead_ioc thread failed !\n",
+                                ioc->name, __func__);
+                } else {
+                        printk(MYIOC_s_WARN_FMT
+                                "%s: Running mpt_dead_ioc thread success !\n",
+                                ioc->name, __func__);
+                }
+                return; /* don't rearm timer */
+        }
+
+        if ((ioc_raw_state & MPI_IOC_STATE_MASK)
+                        == MPI_IOC_STATE_FAULT) {
                 printk(MYIOC_s_WARN_FMT "IOC is in FAULT state (%04xh)!!!\n",
                        ioc->name, ioc_raw_state & MPI_DOORBELL_DATA_MASK);
                 printk(MYIOC_s_WARN_FMT "Issuing HardReset from %s!!\n",
@@ -6413,8 +6474,19 @@ mpt_config(MPT_ADAPTER *ioc, CONFIGPARMS *pCfg)
                         pReq->Action, ioc->mptbase_cmds.status, timeleft));
                 if (ioc->mptbase_cmds.status & MPT_MGMT_STATUS_DID_IOCRESET)
                         goto out;
-                if (!timeleft)
+                if (!timeleft) {
+                        spin_lock_irqsave(&ioc->taskmgmt_lock, flags);
+                        if (ioc->ioc_reset_in_progress) {
+                                spin_unlock_irqrestore(&ioc->taskmgmt_lock,
+                                        flags);
+                                printk(MYIOC_s_INFO_FMT "%s: host reset in"
+                                        " progress mpt_config timed out.!!\n",
+                                        __func__, ioc->name);
+                                return -EFAULT;
+                        }
+                        spin_unlock_irqrestore(&ioc->taskmgmt_lock, flags);
                         issue_hard_reset = 1;
+                }
                 goto out;
         }
 
@@ -7128,7 +7200,18 @@ mpt_HardResetHandler(MPT_ADAPTER *ioc, int sleepFlag)
         spin_lock_irqsave(&ioc->taskmgmt_lock, flags);
         if (ioc->ioc_reset_in_progress) {
                 spin_unlock_irqrestore(&ioc->taskmgmt_lock, flags);
-                return 0;
+                ioc->wait_on_reset_completion = 1;
+                do {
+                        ssleep(1);
+                } while (ioc->ioc_reset_in_progress == 1);
+                ioc->wait_on_reset_completion = 0;
+                return ioc->reset_status;
+        }
+        if (ioc->wait_on_reset_completion) {
+                spin_unlock_irqrestore(&ioc->taskmgmt_lock, flags);
+                rc = 0;
+                time_count = jiffies;
+                goto exit;
         }
         ioc->ioc_reset_in_progress = 1;
         if (ioc->alt_ioc)
@@ -7165,6 +7248,7 @@ mpt_HardResetHandler(MPT_ADAPTER *ioc, int sleepFlag)
         ioc->ioc_reset_in_progress = 0;
         ioc->taskmgmt_quiesce_io = 0;
         ioc->taskmgmt_in_progress = 0;
+        ioc->reset_status = rc;
         if (ioc->alt_ioc) {
                 ioc->alt_ioc->ioc_reset_in_progress = 0;
                 ioc->alt_ioc->taskmgmt_quiesce_io = 0;
@@ -7180,7 +7264,7 @@ mpt_HardResetHandler(MPT_ADAPTER *ioc, int sleepFlag)
                                         ioc->alt_ioc, MPT_IOC_POST_RESET);
                 }
         }
-
+exit:
         dtmprintk(ioc,
             printk(MYIOC_s_DEBUG_FMT
                 "HardResetHandler: completed (%d seconds): %s\n", ioc->name,