linux-kernel - Re: [PATCH 5/7] cxl/mem: Move device register setup

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: <20210408182808.00007f69@Huawei.com>
Date:   Thu, 8 Apr 2021 18:28:08 +0100
From:   Jonathan Cameron <Jonathan.Cameron@...wei.com>
To:     Ben Widawsky <ben.widawsky@...el.com>
CC:     <linux-cxl@...r.kernel.org>, <linux-pci@...r.kernel.org>,
        <linux-acpi@...r.kernel.org>, <ira.weiny@...el.com>,
        <vishal.l.verma@...el.com>, <alison.schofield@...el.com>,
        <dan.j.williams@...el.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 5/7] cxl/mem: Move device register setup

On Wed, 7 Apr 2021 15:26:23 -0700
Ben Widawsky <ben.widawsky@...el.com> wrote:

> Support expansion of register block types that the driver will attempt
> to recognize by pulling the code up into the register block scanning
> loop. Subsequent code can easily add in new register block types with
> this.
> 
> Signed-off-by: Ben Widawsky <ben.widawsky@...el.com>

Acked-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>>

> ---
>  drivers/cxl/mem.c | 19 +++++++++----------
>  1 file changed, 9 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c
> index 60b95c524c3e..49f651694cb0 100644
> --- a/drivers/cxl/mem.c
> +++ b/drivers/cxl/mem.c
> @@ -1020,6 +1020,15 @@ static int cxl_mem_setup_regs(struct cxl_mem *cxlm)
>  			base = cxl_mem_map_regblock(cxlm, reg_lo, reg_hi);
>  			if (IS_ERR(base))
>  				return PTR_ERR(base);
> +
> +			cxl_setup_device_regs(dev, base, &regs->device_regs);
> +			if (!regs->status || !regs->mbox || !regs->memdev) {
> +				dev_err(dev, "registers not found: %s%s%s\n",
> +						!regs->status ? "status " : "",
> +						!regs->mbox ? "mbox " : "",
> +						!regs->memdev ? "memdev" : "");
> +				return -ENXIO;
> +			}
>  			break;
>  		}
>  	}
> @@ -1029,16 +1038,6 @@ static int cxl_mem_setup_regs(struct cxl_mem *cxlm)
>  		return -ENXIO;
>  	}
>  
> -	cxl_setup_device_regs(dev, base, &regs->device_regs);
> -
> -	if (!regs->status || !regs->mbox || !regs->memdev) {
> -		dev_err(dev, "registers not found: %s%s%s\n",
> -			!regs->status ? "status " : "",
> -			!regs->mbox ? "mbox " : "",
> -			!regs->memdev ? "memdev" : "");
> -		return -ENXIO;
> -	}
> -
>  	return 0;
>  }
>