linux-kernel - Re: [PATCH] scsi: megaraid_{mm,mbox} init fix for kdump

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Message-ID: <459EE440.6070908@oracle.com>
Date:	Fri, 05 Jan 2007 15:50:24 -0800
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	"Patro, Sumant" <Sumant.Patro@....com>
CC:	James.Bottomley@...elEye.com, akpm@...l.org,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Kolli, Neela" <Neela.Kolli@....com>, "Yang, Bo" <Bo.Yang@....com>
Subject: Re: [PATCH] scsi: megaraid_{mm,mbox} init fix for kdump

Patro, Sumant wrote:
> Hello Randy,
> 
> 	At this time I am not trying to modify the function comment
> style of existing megaraid_mbox code. For the new function the
> description style is in sync with the preexisting code.
> 	So, I request for the patch to be accepted in its current
> submitted form. 

I have no problem with that as long as you'll allow it to be
corrected to match kernel-doc syntax.  Or don't use kernel-doc
syntax there at all.

> Regards,
> 
> Sumant 
> 
> -----Original Message-----
> From: Randy Dunlap [mailto:randy.dunlap@...cle.com] 
> Sent: Friday, January 05, 2007 1:35 PM
> To: Patro, Sumant
> Cc: James.Bottomley@...elEye.com; akpm@...l.org;
> linux-scsi@...r.kernel.org; linux-kernel@...r.kernel.org; Kolli, Neela;
> Yang, Bo; Patro, Sumant
> Subject: Re: [PATCH] scsi: megaraid_{mm,mbox} init fix for kdump
> 
> On Fri, 05 Jan 2007 07:10:09 -0800 Sumant Patro wrote:
> 
> Hi,
> 
>> ---
>>
>>  Documentation/scsi/ChangeLog.megaraid |   16 ++
>>  drivers/scsi/megaraid/megaraid_mbox.c |  140 +++++++++++++++++++-----
>>  drivers/scsi/megaraid/megaraid_mbox.h |    4
>>  3 files changed, 130 insertions(+), 30 deletions(-)
>>
>> diff -uprN linux-2.6.orig/drivers/scsi/megaraid/megaraid_mbox.c
> linux-2.6.new/drivers/scsi/megaraid/megaraid_mbox.c
>> --- linux-2.6.orig/drivers/scsi/megaraid/megaraid_mbox.c
> 2006-12-28 09:56:04.000000000 -0800
>> +++ linux-2.6.new/drivers/scsi/megaraid/megaraid_mbox.c
> 2007-01-04 11:22:21.000000000 -0800
>> @@ -3380,6 +3386,84 @@ megaraid_mbox_flush_cache(adapter_t *ada
>>  
>>  
>>  /**
>> + * megaraid_mbox_fire_sync_cmd - fire the sync cmd
>> + * @param adapter	: soft state for the controller
> 
> That (above) should just be:
>  * @adapter:  (plus its description; the description there
>    doesn't seem to agree with its parameter name).
> 
> 
>> + *
>> + * Clears the pending cmds in FW and reinits its RAID structs  */ 
>> +static int megaraid_mbox_fire_sync_cmd(adapter_t *adapter) {
>> +	mbox_t	*mbox;
>> +	uint8_t	raw_mbox[sizeof(mbox_t)];
>> +	mraid_device_t	*raid_dev = ADAP2RAIDDEV(adapter);
>> +	mbox64_t *mbox64;
>> +	int	status = 0;
>> +	int i;
>> +	uint32_t dword;
>> +
>> +	mbox = (mbox_t *)raw_mbox;
>> +
>> +	memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
>> +
>> +	raw_mbox[0] = 0xFF;
>> +
>> +	mbox64	= raid_dev->mbox64;
>> +	mbox	= raid_dev->mbox;
>> +
>> +	/* Wait until mailbox is free */
>> +	if (megaraid_busywait_mbox(raid_dev) != 0) {
>> +		status = 1;
>> +		goto blocked_mailbox;
>> +	}
>> +
>> +	/* Copy mailbox data into host structure */
>> +	memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
>> +	mbox->cmdid		= 0xFE;
>> +	mbox->busy		= 1;
>> +	mbox->poll		= 0;
>> +	mbox->ack		= 0;
>> +	mbox->numstatus		= 0;
>> +	mbox->status		= 0;
>> +
>> +	wmb();
>> +	WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
>> +
>> +	/* Wait for maximum 1 min for status to post.
>> +	 * If the Firmware SUPPORTS the ABOVE COMMAND,
>> +	 * mbox->cmd will be set to 0
>> +	 * else
>> +	 * the firmware will reject the command with
>> +	 * mbox->numstatus set to 1
>> +	 */
>> +
>> +	i = 0;
>> +	status = 0;
>> +	while (!mbox->numstatus && mbox->cmd == 0xFF) {
>> +		rmb();
>> +		msleep(1);
>> +		i++;
>> +		if (i > 1000 * 60) {
>> +			status = 1;
>> +			break;
>> +		}
>> +	}
>> +	if (mbox->numstatus == 1)
>> +		status = 1; /*cmd not supported*/
>> +
>> +	/* Check for interrupt line */
>> +	dword = RDOUTDOOR(raid_dev);
>> +	WROUTDOOR(raid_dev, dword);
>> +	WRINDOOR(raid_dev,2);
>> +
>> +	return status;
>> +
>> +blocked_mailbox:
>> +	con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
>> +	return status;
>> +}
>> +
>> +/**
>>   * megaraid_mbox_display_scb - display SCB information, mostly debug
> purposes
>>   * @param adapter	: controllers' soft state
>>   * @param scb  : SCB to be displayed
> 
> I haven't looked at the entire source file, but these extra "param"
> words should not be there.  kernel-doc syntax is just
>   @name: description
> 
> 
> ---
> ~Randy


-- 
~Randy
-
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