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Date:	Fri, 08 Aug 2014 16:23:45 +0200
From:	Tomas Henzl <thenzl@...hat.com>
To:	Ching Huang <ching2048@...ca.com.tw>, hch@...radead.org,
	jbottomley@...allels.com, dan.carpenter@...cle.com,
	agordeev@...hat.com, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/17] arcmsr: Add code to support system hibernation

On 08/08/2014 02:05 PM, Ching Huang wrote:
> From: Ching Huang <ching2048@...ca.com.tw>
>
> This patch adds code to support system hibernation.
>
> Changes in v2 of 3/17:
> * merge patch 18/18 to this patch

Thanks, and please mark the the 18/18 as obsolete - add a comment there 

In my previous response were other comments too, you haven't probably 
noticed them. I could be wrong with my comments, but if you want a review
you should explain why the code is ok as it is.

>
> Signed-off-by: Ching Huang <ching2048@...ca.com.tw>
> ---
>
> Thanks to Tomas's advice.
>
> diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
> --- a/drivers/scsi/arcmsr/arcmsr_hba.c	2014-08-01 17:54:46.000000000 +0800
> +++ b/drivers/scsi/arcmsr/arcmsr_hba.c	2014-08-08 19:03:48.000000000 +0800
> @@ -89,11 +89,15 @@ static int arcmsr_bios_param(struct scsi
>  static int arcmsr_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
>  static int arcmsr_probe(struct pci_dev *pdev,
>  				const struct pci_device_id *id);
> +static int arcmsr_suspend(struct pci_dev *pdev, pm_message_t state);
> +static int arcmsr_resume(struct pci_dev *pdev);
>  static void arcmsr_remove(struct pci_dev *pdev);
>  static void arcmsr_shutdown(struct pci_dev *pdev);
>  static void arcmsr_iop_init(struct AdapterControlBlock *acb);
>  static void arcmsr_free_ccb_pool(struct AdapterControlBlock *acb);
>  static u32 arcmsr_disable_outbound_ints(struct AdapterControlBlock *acb);
> +static void arcmsr_enable_outbound_ints(struct AdapterControlBlock *acb,
> +	u32 intmask_org);
>  static void arcmsr_stop_adapter_bgrb(struct AdapterControlBlock *acb);
>  static void arcmsr_flush_hba_cache(struct AdapterControlBlock *acb);
>  static void arcmsr_flush_hbb_cache(struct AdapterControlBlock *acb);
> @@ -167,6 +171,8 @@ static struct pci_driver arcmsr_pci_driv
>  	.id_table			= arcmsr_device_id_table,
>  	.probe			= arcmsr_probe,
>  	.remove			= arcmsr_remove,
> +	.suspend		= arcmsr_suspend,
> +	.resume			= arcmsr_resume,
>  	.shutdown		= arcmsr_shutdown,
>  };
>  /*
> @@ -772,6 +778,76 @@ static void arcmsr_free_irq(struct pci_d
>  		free_irq(pdev->irq, acb);
>  }
>  
> +static int arcmsr_suspend(struct pci_dev *pdev, pm_message_t state)
> +{
> +	uint32_t intmask_org;
> +	struct Scsi_Host *host = pci_get_drvdata(pdev);
> +	struct AdapterControlBlock *acb =
> +		(struct AdapterControlBlock *)host->hostdata;
> +
> +	intmask_org = arcmsr_disable_outbound_ints(acb);
> +	arcmsr_free_irq(pdev, acb);
> +	del_timer_sync(&acb->eternal_timer);
> +	flush_work(&acb->arcmsr_do_message_isr_bh);
> +	arcmsr_stop_adapter_bgrb(acb);
> +	arcmsr_flush_adapter_cache(acb);
> +	pci_set_drvdata(pdev, host);
> +	pci_save_state(pdev);
> +	pci_disable_device(pdev);
> +	pci_set_power_state(pdev, pci_choose_state(pdev, state));
> +	return 0;
> +}
> +
> +static int arcmsr_resume(struct pci_dev *pdev)
> +{
> +	int error;
> +	struct Scsi_Host *host = pci_get_drvdata(pdev);
> +	struct AdapterControlBlock *acb =
> +		(struct AdapterControlBlock *)host->hostdata;
> +
> +	pci_set_power_state(pdev, PCI_D0);
> +	pci_enable_wake(pdev, PCI_D0, 0);
> +	pci_restore_state(pdev);
> +	if (pci_enable_device(pdev)) {
> +		pr_warn("%s: pci_enable_device error\n", __func__);
> +		return -ENODEV;
> +	}
> +	error = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
> +	if (error) {
> +		error = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
> +		if (error) {
> +			pr_warn("scsi%d: No suitable DMA mask available\n",
> +			       host->host_no);
> +			goto controller_unregister;
> +		}
> +	}
> +	pci_set_master(pdev);
> +	if (arcmsr_request_irq(pdev, acb) == FAILED)
> +		goto controller_stop;
> +	arcmsr_iop_init(acb);
> +	INIT_WORK(&acb->arcmsr_do_message_isr_bh, arcmsr_message_isr_bh_fn);
> +	atomic_set(&acb->rq_map_token, 16);
> +	atomic_set(&acb->ante_token_value, 16);
> +	acb->fw_flag = FW_NORMAL;
> +	init_timer(&acb->eternal_timer);
> +	acb->eternal_timer.expires = jiffies + msecs_to_jiffies(6 * HZ);
> +	acb->eternal_timer.data = (unsigned long) acb;
> +	acb->eternal_timer.function = &arcmsr_request_device_map;
> +	add_timer(&acb->eternal_timer);
> +	return 0;
> +controller_stop:
> +	arcmsr_stop_adapter_bgrb(acb);
> +	arcmsr_flush_adapter_cache(acb);
> +controller_unregister:
> +	scsi_remove_host(host);
> +	arcmsr_free_ccb_pool(acb);
> +	arcmsr_unmap_pciregion(acb);
> +	pci_release_regions(pdev);
> +	scsi_host_put(host);
> +	pci_disable_device(pdev);
> +	return -ENODEV;
> +}
> +
>  static uint8_t arcmsr_abort_hba_allcmd(struct AdapterControlBlock *acb)
>  {
>  	struct MessageUnit_A __iomem *reg = acb->pmuA;
>
>
> --
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