Peter Chen 5e216d54b4 usb: gadget: f_loopback: fix the warning during the enumeration ... The current code tries to allocate memory with GFP_KERNEL at interrupt context, it would show below warning during the enumeration when I test it with chipidea hardware, change GFP flag as GFP_ATOMIC can fix this issue. [ 40.438237] zero gadget: high-speed config #2: loopback [ 40.444924] ------------[ cut here ]------------ [ 40.449609] WARNING: CPU: 0 PID: 0 at kernel/locking/lockdep.c:2755 lockdep_trace_alloc+0x108/0x128() [ 40.461715] DEBUG_LOCKS_WARN_ON(irqs_disabled_flags(flags)) [ 40.467130] Modules linked in: [ 40.470216] usb_f_ss_lb g_zero libcomposite evbug [ 40.473822] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.3.0-rc5-00168-gb730aaf #604 [ 40.481496] Hardware name: Freescale i.MX6 SoloX (Device Tree) [ 40.487345] Backtrace: [ 40.489857] [<80014e94>] (dump_backtrace) from [<80015088>] (show_stack+0x18/0x1c) [ 40.497445] r6:80b67a80 r5:00000000 r4:00000000 r3:00000000 [ 40.503234] [<80015070>] (show_stack) from [<802e27b4>] (dump_stack+0x8c/0xa4) [ 40.510503] [<802e2728>] (dump_stack) from [<8002cfe8>] (warn_slowpath_common+0x80/0xbc) [ 40.518612] r6:8007510c r5:00000009 r4:80b49c88 r3:00000001 [ 40.524396] [<8002cf68>] (warn_slowpath_common) from [<8002d05c>] (warn_slowpath_fmt+0x38/0x40) [ 40.533109] r8:bcfdef80 r7:bdb705cc r6:000080d0 r5:be001e80 r4:809cc278 [ 40.539965] [<8002d028>] (warn_slowpath_fmt) from [<8007510c>] (lockdep_trace_alloc+0x108/0x128) [ 40.548766] r3:809d0128 r2:809cc278 [ 40.552401] r4:600b0193 [ 40.554990] [<80075004>] (lockdep_trace_alloc) from [<801093d4>] (kmem_cache_alloc+0x28/0x15c) [ 40.563618] r4:000080d0 r3:80b4aa8c [ 40.567270] [<801093ac>] (kmem_cache_alloc) from [<804d95e4>] (ep_alloc_request+0x58/0x68) [ 40.575550] r10:7f01f104 r9:00000001 r8:bcfdef80 r7:bdb705cc r6:bc178700 r5:00000000 [ 40.583512] r4:bcfdef80 r3:813c0a38 [ 40.587183] [<804d958c>] (ep_alloc_request) from [<7f01f7ec>] (loopback_set_alt+0x114/0x21c [usb_f_ss_lb]) [ 40.596929] [<7f01f6d8>] (loopback_set_alt [usb_f_ss_lb]) from [<7f006910>] (composite_setup+0xbd0/0x17e8 [libcomposite]) [ 40.607902] r10:bd3a2c0c r9:00000000 r8:bcfdef80 r7:bc178700 r6:bdb702d0 r5:bcfdefdc [ 40.615866] r4:7f0199b4 r3:00000002 [ 40.619542] [<7f005d40>] (composite_setup [libcomposite]) from [<804dae88>] (udc_irq+0x784/0xd1c) [ 40.628431] r10:80bb5619 r9:c0876140 r8:00012001 r7:bdb71010 r6:bdb70568 r5:00010001 [ 40.636392] r4:bdb70014 [ 40.638985] [<804da704>] (udc_irq) from [<804d64f8>] (ci_irq+0x5c/0x118) [ 40.645702] r10:80bb5619 r9:be11e000 r8:00000117 r7:00000000 r6:bdb71010 r5:be11e060 [ 40.653666] r4:bdb70010 [ 40.656261] [<804d649c>] (ci_irq) from [<8007f638>] (handle_irq_event_percpu+0x7c/0x13c) [ 40.664367] r6:00000000 r5:be11e060 r4:bdb05cc0 r3:804d649c [ 40.670149] [<8007f5bc>] (handle_irq_event_percpu) from [<8007f740>] (handle_irq_event+0x48/0x6c) [ 40.679036] r10:00000000 r9:be008000 r8:00000001 r7:00000000 r6:bdb05cc0 r5:be11e060 [ 40.686998] r4:be11e000 [ 40.689581] [<8007f6f8>] (handle_irq_event) from [<80082850>] (handle_fasteoi_irq+0xd4/0x1b0) [ 40.698120] r6:80b56a30 r5:be11e060 r4:be11e000 r3:00000000 [ 40.703898] [<8008277c>] (handle_fasteoi_irq) from [<8007ec04>] (generic_handle_irq+0x28/0x3c) [ 40.712524] r7:00000000 r6:80b4aaf4 r5:00000117 r4:80b445fc [ 40.718304] [<8007ebdc>] (generic_handle_irq) from [<8007ef20>] (__handle_domain_irq+0x6c/0xe8) [ 40.727033] [<8007eeb4>] (__handle_domain_irq) from [<800095d4>] (gic_handle_irq+0x48/0x94) [ 40.735402] r9:c080f100 r8:80b4ac6c r7:c080e100 r6:80b67d40 r5:80b49f00 r4:c080e10c [ 40.743290] [<8000958c>] (gic_handle_irq) from [<80015d38>] (__irq_svc+0x58/0x78) [ 40.750791] Exception stack(0x80b49f00 to 0x80b49f48) [ 40.755873] 9f00: 00000001 00000001 00000000 80024320 80b48000 80b4a9d0 80b4a984 80b433e4 [ 40.764078] 9f20: 00000001 807f4680 00000000 80b49f5c 80b49f20 80b49f50 80071ca4 800113fc [ 40.772272] 9f40: 200b0013 ffffffff [ 40.775776] r9:807f4680 r8:00000001 r7:80b49f34 r6:ffffffff r5:200b0013 r4:800113fc [ 40.783677] [<800113d4>] (arch_cpu_idle) from [<8006c5bc>] (default_idle_call+0x28/0x38) [ 40.791798] [<8006c594>] (default_idle_call) from [<8006c6dc>] (cpu_startup_entry+0x110/0x1b0) [ 40.800445] [<8006c5cc>] (cpu_startup_entry) from [<807e95dc>] (rest_init+0x12c/0x168) [ 40.808376] r7:80b4a8c0 r3:807f4b7c [ 40.812030] [<807e94b0>] (rest_init) from [<80ad7cc0>] (start_kernel+0x360/0x3d4) [ 40.819528] r5:80bcb000 r4:80bcb050 [ 40.823171] [<80ad7960>] (start_kernel) from [<8000807c>] (0x8000807c) It fixes commit 91c42b0da8 ("usb: gadget: loopback: Fix looping back logic implementation"). Cc: <stable@vger.kernel.org> # v3.18+ Signed-off-by: Peter Chen <peter.chen@freescale.com> Reviewed-by: Krzysztof Opasiak <k.opasiak@samsung.com> Signed-off-by: Felipe Balbi <balbi@ti.com>		2015-11-17 11:35:47 -06:00
..
Makefile	usb: gadget: f_printer: convert to new function interface with backward compatibility	2015-03-10 15:33:40 -05:00
f_acm.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
f_ecm.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
f_eem.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
f_fs.c	usb: gadget: ffs: call functionfs_unbind() if _ffs_func_bind() fails	2015-07-31 08:57:57 -05:00
f_hid.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
f_loopback.c	usb: gadget: f_loopback: fix the warning during the enumeration	2015-11-17 11:35:47 -06:00
f_mass_storage.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
f_mass_storage.h	usb: gadget: mass_storage: Use static array for luns	2015-07-31 09:01:19 -05:00
f_midi.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
f_ncm.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
f_obex.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
f_phonet.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
f_printer.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
f_rndis.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
f_serial.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
f_sourcesink.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
f_subset.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
f_uac1.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
f_uac2.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
f_uvc.c	usb: gadget: f_uvc: eliminate abuse of ep->driver data	2015-09-27 10:54:31 -05:00
f_uvc.h	usb: gadget: f_uvc: remove compatibility layer	2014-09-09 09:49:41 -05:00
g_zero.h	Revert "usb: gadget: zero: Add support for interrupt EP"	2015-03-11 10:00:05 -05:00
ndis.h	…
rndis.c	usb: gadget: rndis: use signed type for a signed value	2015-05-21 16:29:14 -05:00
rndis.h	usb: gadget: rndis: use signed type for a signed value	2015-05-21 16:29:14 -05:00
storage_common.c	vfs: add file_path() helper	2015-06-23 18:00:05 -04:00
storage_common.h	usb: gadget: storage-common: Set FSG_MAX_LUNS to 16	2015-07-29 09:59:19 -05:00
u_ecm.h	…
u_eem.h	…
u_ether.c	usb: gadget: u_ether: eliminate abuse of ep->driver data	2015-09-27 10:54:31 -05:00
u_ether.h	usb: gadget: remove gadget_chips.h	2015-08-06 09:35:20 -05:00
u_ether_configfs.h	usb-gadget/ether: use per-attribute show and store methods	2015-10-13 22:14:18 -07:00
u_fs.h	usb: gadget: ffs: add eventfd notification about ffs events	2015-01-27 09:34:59 -06:00
u_gether.h	…
u_hid.h	usb: gadget: hid: add configfs support	2014-11-06 16:18:19 -06:00
u_midi.h	usb: gadget: f_midi: add configfs support	2014-11-05 13:37:17 -06:00
u_ncm.h	…
u_phonet.h	…
u_printer.h	usb: gadget: printer: add configfs support	2015-03-10 15:33:41 -05:00
u_rndis.h	usb: gadget: rndis: remove the limit of available rndis connections	2015-05-07 13:47:17 -05:00
u_serial.c	TTY/Serial driver patches for 4.4-rc1	2015-11-04 21:35:12 -08:00
u_serial.h	…
u_uac1.c	usb: gadget: u_uac1: fix one code style problem	2015-01-15 09:41:48 -06:00
u_uac1.h	usb: gadget: remove gadget_chips.h	2015-08-06 09:35:20 -05:00
u_uac2.h	usb: gadget: f_uac2: add configfs support	2014-08-20 14:04:42 -05:00
u_uvc.h	usb: gadget: uvc: configfs support in uvc function	2015-01-12 12:13:26 -06:00
uvc.h	usb: gadget: uvc: remove unused including <linux/version.h>	2015-04-27 15:48:11 -05:00
uvc_configfs.c	usb-gadget/uvc: use per-attribute show and store methods	2015-10-13 22:13:44 -07:00
uvc_configfs.h	usb: gadget: uvc: configfs support in uvc function	2015-01-12 12:13:26 -06:00
uvc_queue.c	[media] media: videobuf2: Change queue_setup argument	2015-10-20 14:48:39 -02:00
uvc_queue.h	[media] media: videobuf2: Restructure vb2_buffer	2015-10-01 09:04:43 -03:00
uvc_v4l2.c	Merge branch 'drm-next-merged' of git://people.freedesktop.org/~airlied/linux into v4l_for_linus	2015-04-21 09:44:55 -03:00
uvc_v4l2.h	usb: gadget: uvc: separately compile some components of f_uvc	2014-09-09 09:49:12 -05:00
uvc_video.c	Merge branch 'drm-next-merged' of git://people.freedesktop.org/~airlied/linux into v4l_for_linus	2015-04-21 09:44:55 -03:00
uvc_video.h	usb: gadget: uvc: separately compile some components of f_uvc	2014-09-09 09:49:12 -05:00