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Commit 323bb685 authored by Stanislaw Gruszka's avatar Stanislaw Gruszka Committed by David S. Miller
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r8169: changing mtu clean up 



Since we do not change rx buffer size any longer, we can
clean up rtl8169_change_mtu and in consequence rtl8169_down.

Signed-off-by: default avatarStanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent cac4b22f

drivers/net/r8169.c

+6 −41
Original line number Diff line number Diff line
@@ -3908,31 +3908,11 @@ static void rtl_hw_start_8101(struct net_device *dev) 


static int rtl8169_change_mtu(struct net_device *dev, int new_mtu)

{

	struct rtl8169_private *tp = netdev_priv(dev);

	int ret = 0;



	if (new_mtu < ETH_ZLEN || new_mtu > SafeMtu)

		return -EINVAL;



	dev->mtu = new_mtu;



	if (!netif_running(dev))

		goto out;



	rtl8169_down(dev);



	ret = rtl8169_init_ring(dev);

	if (ret < 0)

		goto out;



	napi_enable(&tp->napi);



	rtl_hw_start(dev);



	rtl8169_request_timer(dev);



out:

	return ret;

	return 0;

}



static inline void rtl8169_make_unusable_by_asic(struct RxDesc *desc)
@@ -4684,7 +4664,6 @@ static void rtl8169_down(struct net_device *dev) 
{

	struct rtl8169_private *tp = netdev_priv(dev);

	void __iomem *ioaddr = tp->mmio_addr;

	unsigned int intrmask;



	rtl8169_delete_timer(dev);
@@ -4692,11 +4671,14 @@ static void rtl8169_down(struct net_device *dev) 


	napi_disable(&tp->napi);



core_down:

	spin_lock_irq(&tp->lock);



	rtl8169_asic_down(ioaddr);



	/*

	 * At this point device interrupts can not be enabled in any function,

	 * as netif_running is not true (rtl8169_interrupt, rtl8169_reset_task,

	 * rtl8169_reinit_task) and napi is disabled (rtl8169_poll).

	 */

	rtl8169_rx_missed(dev, ioaddr);



	spin_unlock_irq(&tp->lock);
@@ -4706,23 +4688,6 @@ static void rtl8169_down(struct net_device *dev) 
	/* Give a racing hard_start_xmit a few cycles to complete. */

	synchronize_sched();  /* FIXME: should this be synchronize_irq()? */



	/*

	 * And now for the 50k$ question: are IRQ disabled or not ?

	 *

	 * Two paths lead here:

	 * 1) dev->close

	 *    -> netif_running() is available to sync the current code and the

	 *       IRQ handler. See rtl8169_interrupt for details.

	 * 2) dev->change_mtu

	 *    -> rtl8169_poll can not be issued again and re-enable the

	 *       interruptions. Let's simply issue the IRQ down sequence again.

	 *

	 * No loop if hotpluged or major error (0xffff).

	 */

	intrmask = RTL_R16(IntrMask);

	if (intrmask && (intrmask != 0xffff))

		goto core_down;



	rtl8169_tx_clear(tp);



	rtl8169_rx_clear(tp);