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Message-Id: <200908021919.11169.oliver@neukum.org> Date: Sun, 2 Aug 2009 19:19:10 +0200 From: Oliver Neukum <oliver@...kum.org> To: Alex Riesen <raa.lkml@...il.com> Cc: linux-usb@...r.kernel.org, Oliver Neukum <oliver@...kum.name>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, "Greg Kroah-Hartman" <greg@...ah.com>, Alan Cox <alan@...rguk.ukuu.org.uk> Subject: Re: Oops in CDC ACM after an Openmoko phone (neo1973) changes its usb interface from ACM to Ethernet Am Sonntag, 2. August 2009 18:40:56 schrieb Alex Riesen: > [ 75.453444] Call Trace: > [ 75.453444] [<ffffffff812a77b2>] usb_autopm_get_interface+0xe/0x10 > [ 75.453444] [<ffffffffa0072e19>] acm_port_down+0x3f/0x1bb [cdc_acm] > [ 75.453444] [<ffffffff811f0af1>] ? tty_port_close_start+0xc1/0x153 > [ 75.453444] [<ffffffffa0073258>] acm_tty_close+0x3d/0x83 [cdc_acm] > [ 75.453444] [<ffffffff811eaca7>] tty_release_dev+0x1bf/0x4e8 > [ 75.453444] [<ffffffffa00732c3>] ? acm_tty_open+0x25/0x2ae [cdc_acm] This can happen only if acm_port_down() fails to detect that the device has been disconnected, as it calls usb_autopm_get_interface() only if acm->dev != NULL. This however should not happen if acm_disconnect runs. Can you put a printk into acm_disconnect and recompile with CONFIG_USB_DEBUG? Regards Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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