linux-kernel - Re: [PATCH 3/7] scsi: megaraid_sas - Online COntroller Reset (OCR) PART-III

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Message-ID: <4BE40D6B.5020501@redhat.com>
Date:	Fri, 07 May 2010 14:54:03 +0200
From:	Tomas Henzl <thenzl@...hat.com>
To:	"Yang, Bo" <Bo.Yang@....com>
CC:	"'James.Bottomley@...senPartnership.com'" 
	<James.Bottomley@...senPartnership.com>,
	"'James.Bottomley@...e.de'" <James.Bottomley@...e.de>,
	"'linux-scsi@...r.kernel.org'" <linux-scsi@...r.kernel.org>,
	"'akpm@...l.org'" <akpm@...l.org>,
	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
	"Daftardar, Jayant" <Jayant.Daftardar@....com>
Subject: Re: [PATCH 3/7] scsi: megaraid_sas - Online COntroller Reset (OCR)
 PART-III

On 05/06/2010 05:52 PM, Yang, Bo wrote:
> This is third part of the Online Controller Reset. In ISR routine, if driver receive the FW state change interrupt
> And the online controller reset support enabled in FW, driver will read the controller register.  Driver will issue
> Controller reset if the FW register state failure.  Also driver will back up the pending cmds for the re-fire after
> the reset finished.
>
> Also Driver added the CTIO support to this patch.
>
> Signed-off-by Bo Yang<bo.yang@....com>
>
> +static void
> +process_fw_state_change_wq(struct work_struct *work)
> +{
> +       struct megasas_instance *instance =
> +               container_of(work, struct megasas_instance, work_init);
> +       u32 wait;
> +       unsigned long flags;
> +
> +       if (instance->adprecovery != MEGASAS_ADPRESET_SM_INFAULT) {
> +               printk(KERN_NOTICE "megaraid_sas: error, recovery st %x \n",
> +                               instance->adprecovery);
> +               return ;
> +       }
> +
> +       if (instance->adprecovery == MEGASAS_ADPRESET_SM_INFAULT) {
> +               printk(KERN_NOTICE "megaraid_sas: FW detected to be in fault"
> +                                       "state, restarting it...\n");
> +
> +               instance->instancet->disable_intr(instance->reg_set);
> +               atomic_set(&instance->fw_outstanding, 0);
> +
> +               atomic_set(&instance->fw_reset_no_pci_access, 1);
> +               instance->instancet->adp_reset(instance, instance->reg_set);
> +               atomic_set(&instance->fw_reset_no_pci_access, 0 );
> +
> +               printk(KERN_NOTICE "megaraid_sas: FW restarted successfully,"
> +                                       "initiating next stage...\n");
> +
> +               printk(KERN_NOTICE "megaraid_sas: HBA recovery state machine,"
> +                                       "state 2 starting...\n");
> +
> +               /*waitting for about 20 second before start the second init*/
> +               for (wait = 0; wait < 30; wait++) {
> +                       msleep(1000);
> +               }
>   
Hi Bo,
I'm only curios - couldn't be the above loop replaced by ssleep(30); 
and have the u32 wait; removed?
+		ssleep(30); /* wait for about 30 second before second init */

I guess you wanted to have a space after the comma in the printk, if yes I think
you should do this -> printk(KERN_NOTICE "megaraid_sas: HBA recovery state machine, "

It might be a problem with my mail reader, but it seems to me that you are using 
spaces instead of tabs almost everywhere.

Tomas


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