netdev - Re: [PATCH 2/4] forcedeth: fix power management support

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: <46560AEB.8040402@garzik.org>
Date:	Thu, 24 May 2007 18:00:11 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Ayaz Abdulla <aabdulla@...dia.com>
CC:	Manfred Spraul <manfred@...orfullife.com>,
	Andrew Morton <akpm@...l.org>, nedev <netdev@...r.kernel.org>
Subject: Re: [PATCH 2/4] forcedeth: fix power management support

Ayaz Abdulla wrote:
> This patch fixes the power management functions. It includes lowering 
> the phy speed to conserve power.
> 
> Signed-off-by: Ayaz Abdulla <aabdulla@...dia.com>

Several issues here:

1) Your patch description needs to explain the problems in the power 
management code.  It is self-evident from the patch what functions are 
being changed, and that you feel these changes constitute a fix.  But 
beyond that... no information is given.

2) Lowering the phy speed to conserve power is not an appropriate change 
for a "bug fix only" 2.6.22-rc cycle AFAICS.  Unless there is a 
compelling argument otherwise, I feel this change should be in a 
separate patch, submitted for 2.6.23 (netdev-2.6.git#upstream).

3) You left in debugging printk's, which is sloppy:

+	dprintk(KERN_DEBUG "forcedeth: nv_suspend\n");

4) You save PCI config space twice:

  	pci_save_state(pdev);
+
+	/* save any device state */
+	np->saved_phyinterface = readl(base + NvRegPhyInterface);
+	for (i = 0; i < 64; i++) {
+		pci_read_config_dword(pdev, i*4, &np->saved_config_space[i]);

So, this needs work.

-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html