netdev - Re: [PATCH 1/7] 8139cp: Improve accuracy of cp_interrupt() return, to survive IRQ storms

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Message-ID: <20150923232931.GA8365@electric-eye.fr.zoreil.com>
Date:	Thu, 24 Sep 2015 01:29:31 +0200
From:	Francois Romieu <romieu@...zoreil.com>
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH 1/7] 8139cp: Improve accuracy of cp_interrupt() return,
 to survive IRQ storms

David Woodhouse <dwmw2@...radead.org> :
[...]
> Great, thanks. I've got one more for the net tree; just masking the
> gso_size to the maximum (0xfff) that the hardware can handle, and never
> telling the net stack that that's our maximum, doesn't seem like such a
> good idea...

0xfff, really ?

diff --git a/drivers/net/ethernet/realtek/8139cp.c b/drivers/net/ethernet/realtek/8139cp.c
index d79e33b..8c6811d 100644
--- a/drivers/net/ethernet/realtek/8139cp.c
+++ b/drivers/net/ethernet/realtek/8139cp.c
@@ -174,7 +180,7 @@ enum {
 	LastFrag	= (1 << 28), /* Final segment of a packet */
 	LargeSend	= (1 << 27), /* TCP Large Send Offload (TSO) */
 	MSSShift	= 16,	     /* MSS value position */
-	MSSMask		= 0xfff,     /* MSS value: 11 bits */
+	MSSMask		= 0x7ff,     /* MSS value: 11 bits */
 	TxError		= (1 << 23), /* Tx error summary */
 	RxError		= (1 << 20), /* Rx error summary */
 	IPCS		= (1 << 18), /* Calculate IP checksum */
-- 
Ueimor
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