Messages in this thread | | | From | Jim Cromie <> | Date | Sun, 3 Jul 2011 19:09:09 -0600 | Subject | Re: dma-debug report/error on natsemi eth0 |
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On Sat, Jul 2, 2011 at 11:06 PM, FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> wrote: > On Thu, 30 Jun 2011 12:34:52 -0600 > Jim Cromie <jim.cromie@gmail.com> wrote: > >> since adding DMA-debug to my config, Ive been seeing these. >> I suspect it goes back a ways.. >> >> its on my list to do some investigating, >> but I figured Id report in the meantime. >> >> ------------[ cut here ]------------ >> WARNING: at /home/jimc/projects/lx/linux-2.6/lib/dma-debug.c:820 >> check_unmap+0x1fe/0x56a() >> natsemi 0000:00:06.0: DMA-API: device driver frees DMA memory with >> different size [device address=0x0000000006ef0040] [map size=1538 >> bytes] [unmap size=1522 bytes] >> Modules linked in: pc8736x_gpio pc87360 hwmon_vid scx200_gpio nsc_gpio >> scx200_hrt scx200_acb i2c_core arc4 rtl8180 mac80211 eeprom_93cx6 >> cfg80211 pcspkr rfkill scx200 ide_gd_mod ide_pci_generic ohci_hcd >> usbcore sc1200 ide_core >> Pid: 870, comm: collector Not tainted 3.0.0-rc5-sk-00080-gca56a95 #1 >> Call Trace: >> [<c011a556>] warn_slowpath_common+0x4a/0x5f >> [<c02565cb>] ? check_unmap+0x1fe/0x56a >> [<c011a5cf>] warn_slowpath_fmt+0x26/0x2a > > The following patch silences the warning?
yes it does, thanks.
Reported-by: Jim Cromie <jim.cromie@gmail.com> Tested-by: Jim Cromie <jim.cromie@gmail.com>
> > diff --git a/drivers/net/natsemi.c b/drivers/net/natsemi.c > index b78be08..1019379 100644 > --- a/drivers/net/natsemi.c > +++ b/drivers/net/natsemi.c > @@ -2360,7 +2360,8 @@ static void netdev_rx(struct net_device *dev, int *work_done, int work_to_do) > PCI_DMA_FROMDEVICE); > } else { > pci_unmap_single(np->pci_dev, np->rx_dma[entry], > - buflen, PCI_DMA_FROMDEVICE); > + buflen+NATSEMI_PADDING, > + PCI_DMA_FROMDEVICE); > skb_put(skb = np->rx_skbuff[entry], pkt_len); > np->rx_skbuff[entry] = NULL; > } > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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