linux-kernel - [PATCH 1/6] scsi: megaraid_sas - donot process cmds if hw_crit

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Date:	Wed, 14 Feb 2007 12:34:46 -0800
From:	Sumant Patro <sumantp@...l.com>
To:	James.Bottomley@...elEye.com, akpm@...l.org
Cc:	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	neela.kolli@....com, bo.yang@....com, sumant.patro@....com
Subject: [PATCH 1/6] scsi: megaraid_sas - donot process cmds if
	hw_crit_error is set


Checks if hw_crit_error is set.
If it is set, we donot process commands.
Checks added in megasas_queue_command and command completion routines.

Signed-off-by: Sumant Patro <sumant.patro@....com>
---

 drivers/scsi/megaraid/megaraid_sas.c |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletion(-)

diff -uprN linux-feb13-orig/drivers/scsi/megaraid/megaraid_sas.c linux-feb13-new-p1/drivers/scsi/megaraid/megaraid_sas.c
--- linux-feb13-orig/drivers/scsi/megaraid/megaraid_sas.c	2007-02-13 06:44:46.000000000 -0800
+++ linux-feb13-new-p1/drivers/scsi/megaraid/megaraid_sas.c	2007-02-13 07:18:39.000000000 -0800
@@ -841,6 +841,11 @@ megasas_queue_command(struct scsi_cmnd *
 
 	instance = (struct megasas_instance *)
 	    scmd->device->host->hostdata;
+
+	/* Don't process if we have already declared adapter dead */
+	if (instance->hw_crit_error)
+		return SCSI_MLQUEUE_HOST_BUSY;
+
 	scmd->scsi_done = done;
 	scmd->result = 0;
 
@@ -1282,11 +1287,13 @@ megasas_deplete_reply_queue(struct megas
 	if(instance->instancet->clear_intr(instance->reg_set))
 		return IRQ_NONE;
 
+	if (instance->hw_crit_error)
+		goto out_done;
         /*
 	 * Schedule the tasklet for cmd completion
 	 */
 	tasklet_schedule(&instance->isr_tasklet);
-
+out_done:
 	return IRQ_HANDLED;
 }
 
@@ -1741,6 +1748,10 @@ static void megasas_complete_cmd_dpc(uns
 	struct megasas_cmd *cmd;
 	struct megasas_instance *instance = (struct megasas_instance *)instance_addr;
 
+	/* If we have already declared adapter dead, donot complete cmds */
+	if (instance->hw_crit_error)
+		return;
+
 	producer = *instance->producer;
 	consumer = *instance->consumer;
 


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