linux-kernel - Re: [PATCH 04/20] [SCSI] mpt3sas: Remove redundancy code while freeing the controller resources.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20150612112826.GC2812@c203.arch.suse.de>
Date:	Fri, 12 Jun 2015 13:28:26 +0200
From:	Johannes Thumshirn <jthumshirn@...e.de>
To:	Sreekanth Reddy <sreekanth.reddy@...gotech.com>
Cc:	jejb@...nel.org, hch@...radead.org, martin.petersen@...cle.com,
	linux-scsi@...r.kernel.org, JBottomley@...allels.com,
	Sathya.Prakash@...gotech.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/20] [SCSI] mpt3sas: Remove redundancy code while
 freeing the controller resources.

On Fri, Jun 12, 2015 at 03:12:16PM +0530, Sreekanth Reddy wrote:
> Removed the redundancy code while freeing the controller resources.
> 
> Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@...gotech.com>
> ---
>  drivers/scsi/mpt3sas/mpt3sas_base.c | 57 +++++++++++++++++++++----------------
>  1 file changed, 32 insertions(+), 25 deletions(-)
> 
> diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
> index ce57320..32b86bf 100644
> --- a/drivers/scsi/mpt3sas/mpt3sas_base.c
> +++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
> @@ -1798,6 +1798,36 @@ _base_enable_msix(struct MPT3SAS_ADAPTER *ioc)
>  }
>  
>  /**
> + * mpt3sas_base_unmap_resources - free controller resources
> + * @ioc: per adapter object
> + */
> +void
> +mpt3sas_base_unmap_resources(struct MPT3SAS_ADAPTER *ioc)
> +{
> +	struct pci_dev *pdev = ioc->pdev;
> +
> +	dexitprintk(ioc, printk(MPT3SAS_FMT "%s\n",
> +		ioc->name, __func__));
> +
> +	_base_free_irq(ioc);
> +	_base_disable_msix(ioc);
> +
> +	if (ioc->msix96_vector)
> +		kfree(ioc->replyPostRegisterIndex);

kfree() already checks for zero or a NULL pointer.

> +
> +	if (ioc->chip_phys) {
> +		iounmap(ioc->chip);
> +		ioc->chip_phys = 0;
> +	}
> +
> +	if (pci_is_enabled(pdev)) {
> +		pci_release_selected_regions(ioc->pdev, ioc->bars);
> +		pci_disable_pcie_error_reporting(pdev);
> +		pci_disable_device(pdev);
> +	}
> +}
> +
> +/**
>   * mpt3sas_base_map_resources - map in controller resources (io/irq/memap)
>   * @ioc: per adapter object
>   *
> @@ -1925,14 +1955,7 @@ mpt3sas_base_map_resources(struct MPT3SAS_ADAPTER *ioc)
>  	return 0;
>  
>   out_fail:
> -	if (ioc->chip_phys)
> -		iounmap(ioc->chip);
> -	ioc->chip_phys = 0;
> -	pci_release_selected_regions(ioc->pdev, ioc->bars);
> -	pci_disable_pcie_error_reporting(pdev);
> -	pci_disable_device(pdev);
> -	if (ioc->msix96_vector)
> -		kfree(ioc->replyPostRegisterIndex);
> +	mpt3sas_base_unmap_resources(ioc);
>  	return r;
>  }
>  
> @@ -4667,8 +4690,6 @@ _base_make_ioc_operational(struct MPT3SAS_ADAPTER *ioc, int sleep_flag)
>  void
>  mpt3sas_base_free_resources(struct MPT3SAS_ADAPTER *ioc)
>  {
> -	struct pci_dev *pdev = ioc->pdev;
> -
>  	dexitprintk(ioc, pr_info(MPT3SAS_FMT "%s\n", ioc->name,
>  	    __func__));
>  
> @@ -4679,21 +4700,7 @@ mpt3sas_base_free_resources(struct MPT3SAS_ADAPTER *ioc)
>  		ioc->shost_recovery = 0;
>  	}
>  
> -	_base_free_irq(ioc);
> -	_base_disable_msix(ioc);
> -
> -	if (ioc->msix96_vector)
> -		kfree(ioc->replyPostRegisterIndex);
> -
> -	if (ioc->chip_phys && ioc->chip)
> -		iounmap(ioc->chip);
> -	ioc->chip_phys = 0;
> -
> -	if (pci_is_enabled(pdev)) {
> -		pci_release_selected_regions(ioc->pdev, ioc->bars);
> -		pci_disable_pcie_error_reporting(pdev);
> -		pci_disable_device(pdev);
> -	}
> +	mpt3sas_base_unmap_resources(ioc);
>  	return;
>  }
>  
> -- 
> 2.0.2
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
> the body of a message to majordomo@...r.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

-- 
Johannes Thumshirn                                       Storage
jthumshirn@...e.de                             +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/