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megaraid_sas: complete outstanding IOCTLs before killing adapter 

Driver calls megasas_complete_cmd() to call wake_up() for each MFI frame
that was issued through the ioctl() interface prior to the kill adapter.
This ensures userspace ioctl() system calls issued just before a kill
adapter don't get stuck in wait state and IOCTLs are returned to
the application.

Cc: <stable@vger.kernel.org>
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: Chaitra Basappa <chaitra.basappa@avagotech.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sumit.Saxena@avagotech.com 2015-01-05 20:06:18 +05:30 committed by Christoph Hellwig
parent c2ced1719a
commit c8dd61eff2
2 changed files with 54 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

55
drivers/scsi/megaraid/megaraid_sas_base.c
View File

@ -1692,22 +1692,66 @@ static int megasas_slave_alloc(struct scsi_device *sdev)
return 0;
}
/*
* megasas_complete_outstanding_ioctls - Complete outstanding ioctls after a
* kill adapter
* @instance: Adapter soft state
*
*/
void megasas_complete_outstanding_ioctls(struct megasas_instance *instance)
{
int i;
struct megasas_cmd *cmd_mfi;
struct megasas_cmd_fusion *cmd_fusion;
struct fusion_context *fusion = instance->ctrl_context;
/* Find all outstanding ioctls */
if (fusion) {
for (i = 0; i < instance->max_fw_cmds; i++) {
cmd_fusion = fusion->cmd_list[i];
if (cmd_fusion->sync_cmd_idx != (u32)ULONG_MAX) {
cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
if (cmd_mfi->sync_cmd &&
cmd_mfi->frame->hdr.cmd != MFI_CMD_ABORT)
megasas_complete_cmd(instance,
cmd_mfi, DID_OK);
}
}
} else {
for (i = 0; i < instance->max_fw_cmds; i++) {
cmd_mfi = instance->cmd_list[i];
if (cmd_mfi->sync_cmd && cmd_mfi->frame->hdr.cmd !=
MFI_CMD_ABORT)
megasas_complete_cmd(instance, cmd_mfi, DID_OK);
}
}
}
void megaraid_sas_kill_hba(struct megasas_instance *instance)
{
/* Set critical error to block I/O & ioctls in case caller didn't */
instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
/* Wait 1 second to ensure IO or ioctls in build have posted */
msleep(1000);
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
writel(MFI_STOP_ADP, &instance->reg_set->doorbell);
writel(MFI_STOP_ADP,
&instance->reg_set->doorbell);
/* Flush */
readl(&instance->reg_set->doorbell);
if (instance->mpio && instance->requestorId)
memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
} else {
writel(MFI_STOP_ADP, &instance->reg_set->inbound_doorbell);
writel(MFI_STOP_ADP,
&instance->reg_set->inbound_doorbell);
}
/* Complete outstanding ioctls when adapter is killed */
megasas_complete_outstanding_ioctls(instance);
}
/**
@ -3031,10 +3075,9 @@ megasas_issue_pending_cmds_again(struct megasas_instance *instance)
"was tried multiple times during reset."
"Shutting down the HBA\n",
cmd, cmd->scmd, cmd->sync_cmd);
instance->instancet->disable_intr(instance);
atomic_set(&instance->fw_reset_no_pci_access, 1);
megaraid_sas_kill_hba(instance);
instance->adprecovery =
MEGASAS_HW_CRITICAL_ERROR;
return;
}
}
@ -3168,8 +3211,8 @@ process_fw_state_change_wq(struct work_struct *work)
if (megasas_transition_to_ready(instance, 1)) {
printk(KERN_NOTICE "megaraid_sas:adapter not ready\n");
atomic_set(&instance->fw_reset_no_pci_access, 1);
megaraid_sas_kill_hba(instance);
instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
return ;
}

4
drivers/scsi/megaraid/megaraid_sas_fusion.c
View File

@ -2631,7 +2631,6 @@ int megasas_reset_fusion(struct Scsi_Host *shost, int iotimeout)
instance->host->host_no);
megaraid_sas_kill_hba(instance);
instance->skip_heartbeat_timer_del = 1;
instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
retval = FAILED;
goto out;
}
@ -2827,8 +2826,6 @@ int megasas_reset_fusion(struct Scsi_Host *shost, int iotimeout)
dev_info(&instance->pdev->dev,
"Failed from %s %d\n",
__func__, __LINE__);
instance->adprecovery =
MEGASAS_HW_CRITICAL_ERROR;
megaraid_sas_kill_hba(instance);
retval = FAILED;
}
@ -2877,7 +2874,6 @@ int megasas_reset_fusion(struct Scsi_Host *shost, int iotimeout)
"adapter scsi%d.\n", instance->host->host_no);
megaraid_sas_kill_hba(instance);
instance->skip_heartbeat_timer_del = 1;
instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
retval = FAILED;
} else {
/* For VF: Restart HB timer if we didn't OCR */