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5bbc852676
linux/drivers/usb/gadget/udc
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Peter Chen 5bbc852676 usb: gadget: dummy_hcd: clear usb_gadget region before registration 
When the user does device unbind and rebind test, the kernel will
show below dump due to usb_gadget memory region is dirty after unbind.
Clear usb_gadget region for every new probe.

root@imx6qdlsolo:/sys/bus/platform/drivers/dummy_udc# echo dummy_udc.0 > bind
[  102.523312] kobject (eddd78b0): tried to init an initialized object, something is seriously wrong.
[  102.532447] CPU: 0 PID: 734 Comm: sh Not tainted 4.10.0-rc7-00872-g1b2b8e9 #1298
[  102.539866] Hardware name: Freescale i.MX6 SoloX (Device Tree)
[  102.545717] Backtrace:
[  102.548225] [<c010d090>] (dump_backtrace) from [<c010d338>] (show_stack+0x18/0x1c)
[  102.555822]  r7:ede34000 r6:60010013 r5:00000000 r4:c0f29418
[  102.561512] [<c010d320>] (show_stack) from [<c040c2a4>] (dump_stack+0xb4/0xe8)
[  102.568764] [<c040c1f0>] (dump_stack) from [<c040e6d4>] (kobject_init+0x80/0x9c)
[  102.576187]  r10:0000001f r9:eddd7000 r8:eeaf8c10 r7:eddd78a8 r6:c177891c r5:c0f3b060
[  102.584036]  r4:eddd78b0 r3:00000000
[  102.587641] [<c040e654>] (kobject_init) from [<c05359a4>] (device_initialize+0x28/0xf8)
[  102.595665]  r5:eebc4800 r4:eddd78a8
[  102.599268] [<c053597c>] (device_initialize) from [<c05382ac>] (device_register+0x14/0x20)
[  102.607556]  r7:eddd78a8 r6:00000000 r5:eebc4800 r4:eddd78a8
[  102.613256] [<c0538298>] (device_register) from [<c0668ef4>] (usb_add_gadget_udc_release+0x8c/0x1ec)
[  102.622410]  r5:eebc4800 r4:eddd7860
[  102.626015] [<c0668e68>] (usb_add_gadget_udc_release) from [<c0669068>] (usb_add_gadget_udc+0x14/0x18)
[  102.635351]  r10:0000001f r9:eddd7000 r8:eddd788c r7:bf003770 r6:eddd77f8 r5:eddd7818
[  102.643198]  r4:eddd785c r3:eddd7b24
[  102.646834] [<c0669054>] (usb_add_gadget_udc) from [<bf003428>] (dummy_udc_probe+0x170/0x1c4 [dummy_hcd])
[  102.656458] [<bf0032b8>] (dummy_udc_probe [dummy_hcd]) from [<c053d114>] (platform_drv_probe+0x54/0xb8)
[  102.665881]  r10:00000008 r9:c1778960 r8:bf004128 r7:fffffdfb r6:bf004128 r5:eeaf8c10
[  102.673727]  r4:eeaf8c10
[  102.676293] [<c053d0c0>] (platform_drv_probe) from [<c053b160>] (driver_probe_device+0x264/0x474)
[  102.685186]  r7:00000000 r6:00000000 r5:c1778960 r4:eeaf8c10
[  102.690876] [<c053aefc>] (driver_probe_device) from [<c05397c4>] (bind_store+0xb8/0x14c)
[  102.698994]  r10:eeb3bb4c r9:ede34000 r8:0000000c r7:eeaf8c44 r6:bf004128 r5:c0f3b668
[  102.706840]  r4:eeaf8c10
[  102.709402] [<c053970c>] (bind_store) from [<c0538ca8>] (drv_attr_store+0x28/0x34)
[  102.716998]  r9:ede34000 r8:00000000 r7:ee3863c0 r6:ee3863c0 r5:c0538c80 r4:c053970c
[  102.724776] [<c0538c80>] (drv_attr_store) from [<c029c930>] (sysfs_kf_write+0x50/0x54)
[  102.732711]  r5:c0538c80 r4:0000000c
[  102.736313] [<c029c8e0>] (sysfs_kf_write) from [<c029be84>] (kernfs_fop_write+0x100/0x214)
[  102.744599]  r7:ee3863c0 r6:eeb3bb40 r5:00000000 r4:00000000
[  102.750287] [<c029bd84>] (kernfs_fop_write) from [<c0222dd8>] (__vfs_write+0x34/0x120)
[  102.758231]  r10:00000000 r9:ede34000 r8:c0108bc4 r7:0000000c r6:ede35f80 r5:c029bd84
[  102.766077]  r4:ee223780
[  102.768638] [<c0222da4>] (__vfs_write) from [<c0224678>] (vfs_write+0xa8/0x170)
[  102.775974]  r9:ede34000 r8:c0108bc4 r7:ede35f80 r6:01861cb0 r5:ee223780 r4:0000000c
[  102.783743] [<c02245d0>] (vfs_write) from [<c0225498>] (SyS_write+0x4c/0xa8)
[  102.790818]  r9:ede34000 r8:c0108bc4 r7:0000000c r6:01861cb0 r5:ee223780 r4:ee223780
[  102.798595] [<c022544c>] (SyS_write) from [<c0108a20>] (ret_fast_syscall+0x0/0x1c)
[  102.806188]  r7:00000004 r6:b6e83d58 r5:01861cb0 r4:0000000c

Fixes: 90fccb529d ("usb: gadget: Gadget directory cleanup - group UDC drivers")
Cc: stable <stable@vger.kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Tested-by: Xiaolong Ye <xiaolong.ye@intel.com>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2017-03-06 16:33:20 +02:00
..
bdc usb: gadget: udc: bdc: remove unnecessary & operation 2016-11-03 10:38:25 +02:00
amd5536udc.c
amd5536udc.h
at91_udc.c
at91_udc.h usb: Convert pr_warning to pr_warn 2016-11-03 10:38:36 +02:00
atmel_usba_udc.c USB: changes for v4.11 2017-01-26 15:36:28 +01:00
atmel_usba_udc.h USB: changes for v4.11 2017-01-26 15:36:28 +01:00
bcm63xx_udc.c
core.c usb: gadget: udc-core: Rescan pending list on driver unbind 2017-01-24 11:04:07 +02:00
dummy_hcd.c usb: gadget: dummy_hcd: clear usb_gadget region before registration 2017-03-06 16:33:20 +02:00
fotg210-udc.c usb: gadget: udc: constify usb_ep_ops structures 2017-01-24 11:04:24 +02:00
fotg210.h
fsl_mxc_udc.c
fsl_qe_udc.c usb: gadget: udc: constify usb_ep_ops structures 2017-01-24 11:04:24 +02:00
fsl_qe_udc.h
fsl_udc_core.c scripts/spelling.txt: add "intialization" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
fsl_usb2_udc.h usb: Convert pr_warning to pr_warn 2016-11-03 10:38:36 +02:00
fusb300_udc.c usb: gadget: udc: constify usb_ep_ops structures 2017-01-24 11:04:24 +02:00
fusb300_udc.h
goku_udc.c usb: gadget: udc: constify usb_ep_ops structures 2017-01-24 11:04:24 +02:00
goku_udc.h
gr_udc.c usb: gadget: udc: constify usb_ep_ops structures 2017-01-24 11:04:24 +02:00
gr_udc.h
Kconfig usb: gadget: udc: atmel: Update endpoint allocation scheme 2017-01-24 11:04:24 +02:00
lpc32xx_udc.c
m66592-udc.c usb: gadget: udc: constify usb_ep_ops structures 2017-01-24 11:04:24 +02:00
m66592-udc.h
Makefile
mv_u3d_core.c usb: gadget: udc: constify usb_ep_ops structures 2017-01-24 11:04:24 +02:00
mv_u3d.h
mv_udc_core.c usb: gadget: udc: constify usb_ep_ops structures 2017-01-24 11:04:24 +02:00
mv_udc.h
net2272.c usb: gadget: udc: constify usb_ep_ops structures 2017-01-24 11:04:24 +02:00
net2272.h
net2280.c usb: gadget: udc: net2280: remove unnecessary & operation 2016-11-03 10:38:26 +02:00
net2280.h
omap_udc.c usb: gadget: udc: constify usb_ep_ops structures 2017-01-24 11:04:24 +02:00
omap_udc.h usb: Convert pr_warning to pr_warn 2016-11-03 10:38:36 +02:00
pch_udc.c
pxa25x_udc.c
pxa25x_udc.h usb: Convert pr_warning to pr_warn 2016-11-03 10:38:36 +02:00
pxa27x_udc.c usb: gadget: udc: constify usb_ep_ops structures 2017-01-24 11:04:24 +02:00
pxa27x_udc.h
r8a66597-udc.c usb: gadget: udc: constify usb_ep_ops structures 2017-01-24 11:04:24 +02:00
r8a66597-udc.h
renesas_usb3.c scripts/spelling.txt: add "followings" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
s3c2410_udc.c usb: gadget: udc: s3c2410: remove unnecessary & operation 2016-11-03 10:38:27 +02:00
s3c2410_udc.h
s3c-hsudc.c usb: gadget: udc: constify usb_ep_ops structures 2017-01-24 11:04:24 +02:00
trace.c
trace.h
udc-xilinx.c