linux-kernel - Re: [PATCH] 3c59x: fix bad split of cpu_to_le32(pci_map

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: <20140924101647.GA4651@hmsreliant.think-freely.org>
Date:	Wed, 24 Sep 2014 06:16:47 -0400
From:	Neil Horman <nhorman@...driver.com>
To:	Sylvain 'ythier' Hitier <sylvain.hitier@...il.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Meelis Roos <mroos@...ux.ee>
Subject: Re: [PATCH] 3c59x: fix bad split of cpu_to_le32(pci_map_single())

On Wed, Sep 24, 2014 at 09:30:21AM +0000, Sylvain 'ythier' Hitier wrote:
> Author: Sylvain "ythier" Hitier <sylvain.hitier@...il.com>
> Date:   Wed Sep 24 09:22:16 2014 +0000
> 
>         3c59x: fix bad split of cpu_to_le32(pci_map_single())
>     
>         Change the #else branch like the #if DO_ZEROCOPY branch was changed.
>     
>         Fixes: 6f2b6a3005b2c34c39f207a87667564f64f2f91a
>           # 3c59x: Add dma error checking and recovery
>     
>         Signed-off-by: Sylvain "ythier" Hitier <sylvain.hitier@...il.com>
> 
> diff --git a/drivers/net/ethernet/3com/3c59x.c b/drivers/net/ethernet/3com/3c59x.c
> index 8ca49f04..0a3108b3 100644
> --- a/drivers/net/ethernet/3com/3c59x.c
> +++ b/drivers/net/ethernet/3com/3c59x.c
> @@ -2214,7 +2214,7 @@ boomerang_start_xmit(struct sk_buff *skb, struct net_device *dev)
>  		}
>  	}
>  #else
> -	dma_addr = cpu_to_le32(pci_map_single(VORTEX_PCI(vp), skb->data, skb->len, PCI_DMA_TODEVICE));
> +	dma_addr = pci_map_single(VORTEX_PCI(vp), skb->data, skb->len, PCI_DMA_TODEVICE);
>  	if (dma_mapping_error(&VORTEX_PCI(vp)->dev, dma_addr))
>  		goto out_dma_err;
>  	vp->tx_ring[entry].addr = cpu_to_le32(dma_addr);
> 
Actually, scratch my last note.  Sorry, too early here.  This isn't about
removing the cpu_to_le32 as its already preformed in the assignment to .addr.
Thats actually somewhat broken for lots of reasons (previously we did 2
cpu_to_le32 swaps, which seems completely wrong).  You do probably want to fixup
the changelog to be a bit more clear as to whats going on here.
Neil

> 
> 
> Regards,
> Sylvain "ythier" Hitier
> 
> -- 
> Business is about being busy, not being rich...
> Lived 777 days in a Debian package => http://en.wikipedia.org/wiki/Apt,_Vaucluse
> There's THE room for ideals in this mechanical place!
> 
--
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/