linux-kernel - Re: [v9 1/2] misc: pci_endpoint_test: Remove the "remainder" code

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: <Z34r44ltlzRhatyg@ryzen>
Date: Wed, 8 Jan 2025 08:40:19 +0100
From: Niklas Cassel <cassel@...nel.org>
To: Hans Zhang <18255117159@....com>
Cc: manivannan.sadhasivam@...aro.org, kw@...ux.com, kishon@...nel.org,
	arnd@...db.de, gregkh@...uxfoundation.org,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	rockswang7@...il.com
Subject: Re: [v9 1/2] misc: pci_endpoint_test: Remove the "remainder" code

On Wed, Jan 08, 2025 at 03:25:03PM +0800, Hans Zhang wrote:
> A BAR size is always a power of two. buf_size = min(SZ_1M, bar_size);
> If the BAR size is <= 1MB, there will be 1 iteration, no remainder. If
> the BAR size is > 1MB, there will be more than one iteration, but the
> size will always be evenly divisible by 1MB, so no remainder.
> 
> Signed-off-by: Hans Zhang <18255117159@....com>
> Suggested-by: Niklas Cassel <cassel@...nel.org>
> ---
>  drivers/misc/pci_endpoint_test.c | 6 ------
>  1 file changed, 6 deletions(-)
> 
> diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
> index 3aaaf47fa4ee..0e68dfa7257a 100644
> --- a/drivers/misc/pci_endpoint_test.c
> +++ b/drivers/misc/pci_endpoint_test.c
> @@ -313,12 +313,6 @@ static bool pci_endpoint_test_bar(struct pci_endpoint_test *test,
>  						 write_buf, read_buf, buf_size))
>  			return false;
>  
> -	remain = bar_size % buf_size;
> -	if (remain)
> -		if (pci_endpoint_test_bar_memcmp(test, barno, buf_size * iters,
> -						 write_buf, read_buf, remain))
> -			return false;
> -
>  	return true;
>  }
>  
> -- 
> 2.25.1
> 

You also need to remove the remain variable declaration in this patch,
otherwise there will be a build warning when building this patch.

With that fixed:
Reviewed-by: Niklas Cassel <cassel@...nel.org>