linux-kernel - Re: [PATCH] can: kvaser_usb: Don't free packets when tight on URBs

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Date:	Thu, 1 Jan 2015 13:59:13 -0800
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	"Ahmed S. Darwish" <darwish.07@...il.com>
Cc:	Olivier Sobrie <olivier@...rie.be>,
	Oliver Hartkopp <socketcan@...tkopp.net>,
	Wolfgang Grandegger <wg@...ndegger.com>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	"David S. Miller" <davem@...emloft.net>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Linux-CAN <linux-can@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] can: kvaser_usb: Don't free packets when tight on URBs

On Tue, 23 Dec 2014 17:46:54 +0200
"Ahmed S. Darwish" <darwish.07@...il.com> wrote:

>  	int ret = NETDEV_TX_OK;
> +	bool kfree_skb_on_error = true;
>  
>  	if (can_dropped_invalid_skb(netdev, skb))
>  		return NETDEV_TX_OK;
> @@ -1336,6 +1337,7 @@ static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb,
>  
>  	if (!context) {
>  		netdev_warn(netdev, "cannot find free context\n");
> +		kfree_skb_on_error = false;
>  		ret =  NETDEV_TX_BUSY;

You already have a flag value (ret == NETDEV_TX_BUSY), why
not use that instead of introducing another variable?
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