linux-kernel - Re: [PATCH 1/3] dl2k: Handle memory allocation errors in alloc

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Message-Id: <201511180910.40728.linux@rainbow-software.org>
Date:	Wed, 18 Nov 2015 09:10:40 +0100
From:	Ondrej Zary <linux@...nbow-software.org>
To:	Francois Romieu <romieu@...zoreil.com>
Cc:	netdev@...r.kernel.org, David Miller <davem@...emloft.net>,
	Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] dl2k: Handle memory allocation errors in alloc_list

On Tuesday 17 November 2015, Francois Romieu wrote:
> Ondrej Zary <linux@...nbow-software.org> :
> > If memory allocation fails in alloc_list(), free the already allocated
> > memory and return -ENODEV. In rio_open(), call alloc_list() first and
> > abort if it fails. Move HW access (set RFDListPtr) out ot alloc_list().
> >
> > Signed-off-by: Ondrej Zary <linux@...nbow-software.org>
>
> ENODEV vs ENOMEM aside, it's ok with me.

Will fix the description in v2.

> The driver may avoid depleting the receive ring when
> netdev_alloc_skb_ip_align fails in receive_packet (drop and increase
> stats->rx_dropped).
>
> Then you may replace the pci_* dma helpers with the plain dma_* ones (they
> can fail).
>
> And perform a plain napi conversion.

NAPI is on the todo list. Thanks for suggestions.

-- 
Ondrej Zary
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