linux-kernel - Re: [PATCH] pcnet32: fix a logic error with pci_set_dma

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Message-ID: <1445486486.5667.33.camel@Lunix2.home>
Date:	Wed, 21 Oct 2015 21:01:26 -0700
From:	Don Fry <pcnet32@...ntier.com>
To:	David Miller <davem@...emloft.net>
Cc:	geliangtang@....com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pcnet32: fix a logic error with pci_set_dma_mask

On Mon, 2015-10-12 at 05:38 -0700, David Miller wrote:
> From: Geliang Tang <geliangtang@....com>
> Date: Fri,  9 Oct 2015 03:45:39 -0700
> 
> > pcnet32 can't work on my machine recently. It says "architecture
> > does not support 32bit PCI busmaster DMA". There is a logic error
> > in it: pci_set_dma_mask() return 0 means return successfully.
> > 
> > Signed-off-by: Geliang Tang <geliangtang@....com>
> 
> This driver doesn't call pci_set_dma_mask() in any of my tree(s).
I failed.  My system with pcnet32 boards was down with a dead power
supply and a visual review was not good enough.  I missed that
pci_dma_supported returns 1 on success and pci_set_dma_mask returns 0 on
success.  The original patch needs to have the ! removed as Geliang Tang
points out.

Acked-by:  Don Fry <pcnet32@...ntier.com>

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