From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: [PATCH 6/6] IP100A Solve host error problem when in low performance embedded Date: Fri, 18 Aug 2006 07:17:53 -0400 Message-ID: <44E5A1E1.1060500@pobox.com> References: <1155841780.4532.21.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, akpm@osdl.org Return-path: Received: from srv5.dvmed.net ([207.36.208.214]:2520 "EHLO mail.dvmed.net") by vger.kernel.org with ESMTP id S932401AbWHRLR4 (ORCPT ); Fri, 18 Aug 2006 07:17:56 -0400 To: Jesse Huang In-Reply-To: <1155841780.4532.21.camel@localhost.localdomain> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Jesse Huang wrote: > From: Jesse Huang > > Solve host error problem when in low performance embedded > > Change Logs: > Solve host error problem when in low performance embedded > > --- > > drivers/net/sundance.c | 26 ++++++++++++++++++++++---- > 1 files changed, 22 insertions(+), 4 deletions(-) > > 78ff57ea887c19b7552342e990375f5e2bb10af9 > diff --git a/drivers/net/sundance.c b/drivers/net/sundance.c > index c7c22f0..94ba6ca 100755 > --- a/drivers/net/sundance.c > +++ b/drivers/net/sundance.c > @@ -1075,7 +1075,7 @@ reset_tx (struct net_device *dev) > struct sk_buff *skb; > int i; > int irq = in_interrupt(); > - > + tasklet_kill(&np->tx_tasklet); NAK, it is a bug to call tasklet_kill() from inside an interrupt. > @@ -1646,6 +1646,13 @@ static int netdev_close(struct net_devic > struct sk_buff *skb; > int i; > > + /* Wait and kill tasklet */ > + tasklet_kill(&np->rx_tasklet); > + tasklet_kill(&np->tx_tasklet); > + np->cur_tx = np->dirty_tx = 0; fix source code indent > + np->cur_task = 0; > + np->last_tx=0; needs whitespace: s/=/ = / > netif_stop_queue(dev); > > if (netif_msg_ifdown(np)) { > @@ -1666,9 +1673,19 @@ static int netdev_close(struct net_devic > /* Stop the chip's Tx and Rx processes. */ > iowrite16(TxDisable | RxDisable | StatsDisable, ioaddr + MACCtrl1); > > - /* Wait and kill tasklet */ > - tasklet_kill(&np->rx_tasklet); > - tasklet_kill(&np->tx_tasklet); > + for(i=2000;i> 0;i--) { > + if((readl(ioaddr + DMACtrl)&0xC000) == 0)break; > + mdelay(1); > + } (1) fix indentation (2) add whitespace to 'for' loop (3) use ioread32(), not readl() (4) are you certain that DMACtrl should be read as a 32-bit register? In other code, you treat it as a 16-bit register. > + writew(GlobalReset | DMAReset | FIFOReset |NetworkReset, ioaddr +ASICCtrl + 2); (5) use iowrite16() not writew() > + for(i=2000;i >0;i--) > + { > + if((readw(ioaddr + ASICCtrl +2)&ResetBusy) == 0) > + break; > + mdelay(1); > + } (6) fix indentation to match the rest of the driver (7) use ioread16(), not readw() (8) add whitespace to 'for' loop > #ifdef __i386__ > if (netif_msg_hw(np)) { > @@ -1706,6 +1723,7 @@ #endif /* __i386__ debugging only */ > } > } > for (i = 0; i < TX_RING_SIZE; i++) { > + np->tx_ring[i].next_desc=0; (9) add whitespace to assignment: s/=/ = / > skb = np->tx_skbuff[i]; > if (skb) { > pci_unmap_single(np->pci_dev,