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

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Message-ID: <20151117225403.GA3362@electric-eye.fr.zoreil.com>
Date:	Tue, 17 Nov 2015 23:54:03 +0100
From:	Francois Romieu <romieu@...zoreil.com>
To:	Ondrej Zary <linux@...nbow-software.org>
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

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.

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.

-- 
Ueimor
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