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Date: Sat, 07 Mar 2015 12:23:46 +0100 From: Alexander Holler <holler@...oftware.de> To: Alan Stern <stern@...land.harvard.edu>, Al Viro <viro@...IV.linux.org.uk> CC: Richard Weinberger <richard.weinberger@...il.com>, USB list <linux-usb@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>, Felipe Balbi <balbi@...com> Subject: Re: gadgetfs broken since 7f7f25e8 Am 04.03.2015 um 16:31 schrieb Alan Stern: > check to see what those values actually were. It's easy enough to fix > up, though; revised patch below. Thanks, in contrast to the patch from Al Viro that one applies. I wonder if the patches in the (vfs-)tree he has used as base might fix some more problems of gadgetfs I've discovered since I can use it. In detail it's only usable once (3.19). When unmounting it throws one or two warnings because of too much puts (kernel/module.c:963, see below). The result is that a subsequent mount afterwards fails because the old instance is still busy (Resource temporarily unavailable). I haven't looked deeper into that problem up to now. Regards, Alexander Holler [ 151.425966] gadgetfs: USB Gadget filesystem, version 24 Aug 2004 [ 151.479616] gadgetfs: bound to musb-hdrc driver [ 151.781095] gadgetfs: connected [ 151.785871] gadgetfs: disconnected [ 151.864187] gadgetfs: connected [ 151.873258] gadgetfs: configuration #1 [ 151.962240] musb_g_ep0_irq 804: SETUP packet len 0 != 8 ? [ 155.065272] input: USB Keyboard as /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1.auto/usb2/2-1/2-1:1.0/0003:04D9:1603.0003/input/input2 [ 155.119746] hid-generic 0003:04D9:1603.0003: input,hidraw0: USB HID v1.10 Keyboard [ USB Keyboard] on usb-musb-hdrc.1.auto-1/input0 [ 155.138194] input: USB Keyboard as /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1.auto/usb2/2-1/2-1:1.1/0003:04D9:1603.0004/input/input3 [ 155.189783] hid-generic 0003:04D9:1603.0004: input,hidraw1: USB HID v1.10 Device [ USB Keyboard] on usb-musb-hdrc.1.auto-1/input1 [ 155.190002] gadgetfs: disconnected [ 155.190352] ------------[ cut here ]------------ [ 155.190389] WARNING: CPU: 0 PID: 1290 at kernel/module.c:963 module_put+0x54/0x5c() [ 155.190396] Modules linked in: gadgetfs usb_f_ecm usb_f_rndis u_ether libcomposite configfs ipv6 bnep bluetooth rfkill hid_generic tda998x tilcdc drm_kms_helper ti_cpsw ptp drm usbhid pps_core davinci_cpdma omap_mailbox cppi41 [last unloaded: g_ether] [ 155.190459] CPU: 0 PID: 1290 Comm: usb-mitm Not tainted 3.19.0-bbb-00080-g5e25c2a #246 [ 155.190466] Hardware name: Generic AM33XX (Flattened Device Tree) [ 155.190505] [<c00126f0>] (unwind_backtrace) from [<c00108d8>] (show_stack+0x10/0x14) [ 155.190527] [<c00108d8>] (show_stack) from [<c002ef74>] (warn_slowpath_common+0x80/0xa8) [ 155.190542] [<c002ef74>] (warn_slowpath_common) from [<c002f02c>] (warn_slowpath_null+0x18/0x20) [ 155.190556] [<c002f02c>] (warn_slowpath_null) from [<c0069afc>] (module_put+0x54/0x5c) [ 155.190581] [<c0069afc>] (module_put) from [<c00c3be0>] (deactivate_locked_super+0x4c/0x64) [ 155.190598] [<c00c3be0>] (deactivate_locked_super) from [<c00d8d88>] (cleanup_mnt+0x4c/0x6c) [ 155.190614] [<c00d8d88>] (cleanup_mnt) from [<c0041908>] (task_work_run+0x8c/0xa4) [ 155.190628] [<c0041908>] (task_work_run) from [<c001059c>] (do_work_pending+0x98/0xac) [ 155.190642] [<c001059c>] (do_work_pending) from [<c000dc04>] (work_pending+0xc/0x20) [ 155.190649] ---[ end trace c3d57fca714062a3 ]--- -- 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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