Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264467AbUAOBpi (ORCPT ); Wed, 14 Jan 2004 20:45:38 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263510AbUAOBm6 (ORCPT ); Wed, 14 Jan 2004 20:42:58 -0500 Received: from pentafluge.infradead.org ([213.86.99.235]:48809 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S265200AbUAOBlE (ORCPT ); Wed, 14 Jan 2004 20:41:04 -0500 Subject: Re: cdc-acm problems From: Benjamin Herrenschmidt To: Colin Leroy Cc: Linux Kernel list , linuxppc-dev list In-Reply-To: <20040113130529.03f5dbac.colin@colino.net> References: <20040113130529.03f5dbac.colin@colino.net> Content-Type: text/plain Message-Id: <1074130473.5123.41.camel@gaston> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.5 Date: Thu, 15 Jan 2004 12:34:42 +1100 Content-Transfer-Encoding: 7bit X-Spam-Score: 0.0 (/) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2418 Lines: 78 On Tue, 2004-01-13 at 23:05, Colin Leroy wrote: > Hi, > > I have problems with cdc-acm killing ohci. I tried to narrow down the problem, > but didn't get far. > Basically `killall -HUP pppd` gives (in dmesg): > > drivers/usb/class/cdc-acm.c: acm_ctrl_irq - urb shutting down with status: -2 > ohci_hcd 0001:01:1b.1: OHCI Unrecoverable Error, disabled > ohci_hcd 0001:01:1b.1: HC died; cleaning up The above is interesting, looks like a PCI error. I keep getting those unrecoverable errors with those new USB2 capable chips, I don't know what's going on yet. Can try this patch and tell me what it dumps ? ===== drivers/usb/host/ohci-hcd.c 1.53 vs edited ===== --- 1.53/drivers/usb/host/ohci-hcd.c Wed Dec 31 15:25:17 2003 +++ edited/drivers/usb/host/ohci-hcd.c Wed Jan 14 13:20:52 2004 @@ -316,6 +316,11 @@ /* ASSERT: any requests/urbs are being unlinked */ /* ASSERT: nobody can be submitting urbs for this any more */ + if (!HCD_IS_RUNNING (ohci->hcd.state)) { + ed->state = ED_IDLE; + finish_unlinks (ohci, 0, 0); + } + epnum <<= 1; if (epnum != 0 && !(ep & USB_DIR_IN)) epnum |= 1; @@ -571,9 +576,17 @@ disable (ohci); ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n"); // e.g. due to PCI Master/Target Abort +#if 1 + if (hcd->pdev) { + u16 status; + + pci_read_config_word(hcd->pdev, PCI_STATUS, &status); + printk(KERN_ERR "OHCI PCI Status: 0x%04x\n", status); + } +#endif ohci_dump (ohci, 1); - hc_reset (ohci); + hc_reset (ohci); } if (ints & OHCI_INTR_WDH) { ===== drivers/usb/host/ohci-pci.c 1.20 vs edited ===== --- 1.20/drivers/usb/host/ohci-pci.c Tue Oct 28 15:36:00 2003 +++ edited/drivers/usb/host/ohci-pci.c Wed Jan 14 13:23:07 2004 @@ -36,6 +36,17 @@ int ret; if (hcd->pdev) { +#if 1 + u16 status; + + pci_read_config_word(hcd->pdev, PCI_STATUS, &status); + printk(KERN_ERR "OHCI PCI Status: 0x%04x\n", status); + if (status & 0xf900) { + printk(KERN_ERR "Initial error ! clearing ...\n"); + pci_write_config_word(hcd->pdev, PCI_STATUS, status); + } +#endif + ohci->hcca = pci_alloc_consistent (hcd->pdev, sizeof *ohci->hcca, &ohci->hcca_dma); if (!ohci->hcca) - 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/