Re: [RFC v4 14/19] buslogic: Remove host_lock unlock() + lock() from BusLogic_QueueCommand()

["Nicholas A. Bellinger" <nab@linux-iscsi.org>]

On Mon, 2010-09-27 at 19:07 -0700, Nicholas A. Bellinger wrote:
> From: Nicholas Bellinger <nab@linux-iscsi.org>
> 
> This patch removes the now legacy host_lock unlock() + lock() optimization
> from buslogic.c:BusLogic_QueueCommand()
> 

FYI Guys, I have gone ahead and dropped this patch for RFCv5 as the
BusLogic LLD was the only patch in the v4 series who did not set
SHT->unlocked_qcmds=1, so we will still need the BusLogic_QueueCommand()
unlock -> lock before calling BusLogic_Delay() for the two cases below.

Thanks,

--nab

> Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
> ---
>  drivers/scsi/BusLogic.c |    4 ----
>  1 files changed, 0 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/scsi/BusLogic.c b/drivers/scsi/BusLogic.c
> index fc0b4b8..f39b4fc 100644
> --- a/drivers/scsi/BusLogic.c
> +++ b/drivers/scsi/BusLogic.c
> @@ -2837,9 +2837,7 @@ static int BusLogic_QueueCommand(struct scsi_cmnd *Command, void (*CompletionRou
>  	 */
>  	CCB = BusLogic_AllocateCCB(HostAdapter);
>  	if (CCB == NULL) {
> -		spin_unlock_irq(HostAdapter->SCSI_Host->host_lock);
>  		BusLogic_Delay(1);
> -		spin_lock_irq(HostAdapter->SCSI_Host->host_lock);
>  		CCB = BusLogic_AllocateCCB(HostAdapter);
>  		if (CCB == NULL) {
>  			Command->result = DID_ERROR << 16;
> @@ -2965,10 +2963,8 @@ static int BusLogic_QueueCommand(struct scsi_cmnd *Command, void (*CompletionRou
>  		   error as a Host Adapter Hard Reset should be initiated soon.
>  		 */
>  		if (!BusLogic_WriteOutgoingMailbox(HostAdapter, BusLogic_MailboxStartCommand, CCB)) {
> -			spin_unlock_irq(HostAdapter->SCSI_Host->host_lock);
>  			BusLogic_Warning("Unable to write Outgoing Mailbox - " "Pausing for 1 second\n", HostAdapter);
>  			BusLogic_Delay(1);
> -			spin_lock_irq(HostAdapter->SCSI_Host->host_lock);
>  			if (!BusLogic_WriteOutgoingMailbox(HostAdapter, BusLogic_MailboxStartCommand, CCB)) {
>  				BusLogic_Warning("Still unable to write Outgoing Mailbox - " "Host Adapter Dead?\n", HostAdapter);
>  				BusLogic_DeallocateCCB(CCB);