This patch removes the shifting and masking of interface and its alt
setting and provides its own variable.

This looks better and is smaller:
 text    data     bss     dec     hex filename
x86-32
 6940     956      56    7952    1f10 gadget/audio.o.old
 6908     956      56    7920    1ef0 gadget/audio.o.new
arm
 7914     956      56    8926    22de gadget/audio.o.old
 7886     956      56    8898    22c2 gadget/audio.o.new
Acked-by: NJassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

DMA_ADDR_INVALID is used by the UDC driver and the gadgets should
provide only a buffer address. Everything else should be taken core of
by the UDC and udc-core.
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

HS and SS descriptors are staticaly created. They are updated during the
bind process with the endpoint address, string id or interface numbers.

After that, the descriptor chain is linked to struct usb_function which
is used by composite in order to serve the GET_DESCRIPTOR requests,
number of available configs and so on.

There is no need to assign the HS descriptor only if the UDC supports
HS speed because composite won't report those to the host if HS support
has not been reached. The same reasoning is valid for SS.

This patch makes sure each function updates HS/SS descriptors
unconditionally and uses the newly introduced helper function to create a
copy the descriptors for the speed which is supported by the UDC.

While at that, also rename f->descriptors to f->fs_descriptors in order
to make it more explicit what that means.

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The "video->minor = -1" assigment is done in V4L2 by
video_register_device() so it is removed here.
Now. uvc_function_bind() calls in error case uvc_function_unbind() for
cleanup. The problem is that uvc_function_unbind() frees the uvc struct
and uvc_bind_config() does as well in error case of usb_add_function().
Removing kfree() in usb_add_function() would make the patch smaller but
it would look odd because the new allocated memory is not cleaned up.
However it is not guaranteed that if we call usb_add_function() we also
get to the bind function.
Therefore the patch extracts the conditional cleanup from
uvc_function_unbind() applies to uvc_function_bind().
uvc_function_unbind() now contains only the complete cleanup which is
required once everything has been registrated.

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Bhupesh Sharma <bhupesh.sharma@st.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Cc: stable <stable@vger.kernel.org>
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This function works only on FS or HS. If the gadget is HS capable only
HS descriptors are assigned. If we plug it to an 1.1 host it won't work
because we have only 2.0 descriptors. This patch changes the behavior to
provide both sets.
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The HS descriptors are only created if HS is supported by the UDC but we
never free them.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Whether highspeed configuration is valid or not is something that
composite decides and not the gadget. That gadget can only provide the
required descriptors for it.
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

I think this is wrong since 72c973dd ("usb: gadget: add
usb_endpoint_descriptor to struct usb_ep"). If we fail to allocate an ep
or bail out early we shouldn't check for the descriptor which is
assigned at ep_enable() time.

Cc: Tatyana Brokhman <tlinder@codeaurora.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

In case something goes wrong here, don't leak memory / endpoints.
Acked-by: NJassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The 9 for HS means 32ms. Use the macro to make it easier to read.
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The 5+4 magic for HS tries to aim 32ms which is also what is intended
with 1 << 5 for FS. This little macro should make this easier to
understand.
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The descriptor list for FS speed was not NULL terminated. This patch
fixes this.

While here one of the twe two bAlternateSetting assignments for the BOT
interface. Both assign 0, one is enough.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Commit d11519 ("usb: gadget: Add Interface Association Descriptor to
ECM") added the IAD descriptor to FS and HS descriptors. The SS
descriptor has been left out probably because it has been added "just
recently".
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This patch enabled dma mapping, and used dma transfer handler
on mod_host
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

mod.h has irq_bempsts/irq_brdysts to keep each irq status,
but it was difficult to find where they were used
on renesas_usbhs driver by using "grep irq_xxxx" command,
since it used irq_##status macro.
This patch fixup them
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This patch uses devm_request_irq() instead of request_irq(),
and removed free_irq() from driver
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This message is an debugging message. It's useful for finding protocol
details but it's not necessarily an error.
Acked-by: NRoland Stigge <stigge@antcom.de>
Signed-off-by: NAlexandre Pereira da Silva <aletes.xgr@gmail.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This patch adds usbhs_sys_function_pullup() to control
D+ line for USB function, and enabled pullup support on mod_gadget.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This USB V.92/V.32bis Controllered Modem have the USB vendor ID 0x0572
and device ID 0x1340. It need the NO_UNION_NORMAL quirk to be recognized.

Reference:
http://www.conexant.com/servlets/DownloadServlet/DSH-201723-005.pdf?docid=1725&revid=5
See idVendor and idProduct in table 6-1. Device Descriptors
Signed-off-by: NJean-Christian de Rivaz <jc@eclis.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

A long time ago, in v2.4, VM_RESERVED kept swapout process off VMA,
currently it lost original meaning but still has some effects:

 | effect                 | alternative flags
-+------------------------+---------------------------------------------
1| account as reserved_vm | VM_IO
2| skip in core dump      | VM_IO, VM_DONTDUMP
3| do not merge or expand | VM_IO, VM_DONTEXPAND, VM_HUGETLB, VM_PFNMAP
4| do not mlock           | VM_IO, VM_DONTEXPAND, VM_HUGETLB, VM_PFNMAP

This patch removes reserved_vm counter from mm_struct.  Seems like nobody
cares about it, it does not exported into userspace directly, it only
reduces total_vm showed in proc.

Thus VM_RESERVED can be replaced with VM_IO or pair VM_DONTEXPAND | VM_DONTDUMP.

remap_pfn_range() and io_remap_pfn_range() set VM_IO|VM_DONTEXPAND|VM_DONTDUMP.
remap_vmalloc_range() set VM_DONTEXPAND | VM_DONTDUMP.

[akpm@linux-foundation.org: drivers/vfio/pci/vfio_pci.c fixup]
Signed-off-by: NKonstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Carsten Otte <cotte@de.ibm.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Eric Paris <eparis@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Morris <james.l.morris@oracle.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Kentaro Takeda <takedakn@nttdata.co.jp>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Venkatesh Pallipadi <venki@google.com>
Acked-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NMax Filippov <jcmvbkbc@gmail.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

We need to take the terminator into consideration here or the last
character gets silently truncated away later.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>

We set bAlternateSetting to zero twice.  I kept the second one
(.bAlternateSetting = USB_G_ALT_INT_BBB) because that's more
descriptive.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>

This patch (as1607) fixes a race that can occur if a USB host
controller is removed while a process is reading the
/sys/kernel/debug/usb/devices file.

The usb_device_read() routine uses the bus->root_hub pointer to
determine whether or not the root hub is registered.  The is not a
valid test, because the pointer is set before the root hub gets
registered and remains set even after the root hub is unregistered and
deallocated.  As a result, usb_device_read() or usb_device_dump() can
access freed memory, causing an oops.

The patch changes the test to use the hcd->rh_registered flag, which
does get set and cleared at the appropriate times.  It also makes sure
to hold the usb_bus_list_lock mutex while setting the flag, so that
usb_device_read() will become aware of new root hubs as soon as they
are registered.
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
Reported-by: NDon Zickus <dzickus@redhat.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Fixes the following NULL pointer dereference:
[    7.740000] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    7.810000] Unable to handle kernel NULL pointer dereference at virtual address 00000028
[    7.810000] pgd = c3a38000
[    7.810000] [00000028] *pgd=23a8c831, *pte=00000000, *ppte=00000000
[    7.810000] Internal error: Oops: 17 [#1] PREEMPT ARM
[    7.810000] Modules linked in: ohci_hcd(+) regmap_i2c snd_pcm usbcore snd_page_alloc at91_cf snd_timer pcmcia_rsrc snd soundcore gpio_keys regmap_spi pcmcia_core usb_common nls_base
[    7.810000] CPU: 0    Not tainted  (3.6.0-rc6-mpa+ #264)
[    7.810000] PC is at __gpio_to_irq+0x18/0x40
[    7.810000] LR is at ohci_hcd_at91_overcurrent_irq+0x24/0xb4 [ohci_hcd]
[    7.810000] pc : [<c01392d4>]    lr : [<bf08f694>]    psr: 40000093
[    7.810000] sp : c3a11c40  ip : c3a11c50  fp : c3a11c4c
[    7.810000] r10: 00000000  r9 : c02dcd6e  r8 : fefff400
[    7.810000] r7 : 00000000  r6 : c02cc928  r5 : 00000030  r4 : c02dd168
[    7.810000] r3 : c02e7350  r2 : ffffffea  r1 : c02cc928  r0 : 00000000
[    7.810000] Flags: nZcv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment user
[    7.810000] Control: c000717f  Table: 23a38000  DAC: 00000015
[    7.810000] Process modprobe (pid: 285, stack limit = 0xc3a10270)
[    7.810000] Stack: (0xc3a11c40 to 0xc3a12000)
[    7.810000] 1c40: c3a11c6c c3a11c50 bf08f694 c01392cc c3a11c84 c2c38b00 c3806900 00000030
[    7.810000] 1c60: c3a11ca4 c3a11c70 c0051264 bf08f680 c3a11cac c3a11c80 c003e764 c3806900
[    7.810000] 1c80: c2c38b00 c02cb05c c02cb000 fefff400 c3806930 c3a11cf4 c3a11cbc c3a11ca8
[    7.810000] 1ca0: c005142c c005123c c3806900 c3805a00 c3a11cd4 c3a11cc0 c0053f24 c00513e4
[    7.810000] 1cc0: c3a11cf4 00000030 c3a11cec c3a11cd8 c005120c c0053e88 00000000 00000000
[    7.810000] 1ce0: c3a11d1c c3a11cf0 c00124d0 c00511e0 01400000 00000001 00000012 00000000
[    7.810000] 1d00: ffffffff c3a11d94 00000030 00000000 c3a11d34 c3a11d20 c005120c c0012438
[    7.810000] 1d20: c001dac4 00000012 c3a11d4c c3a11d38 c0009b08 c00511e0 c00523fc 60000013
[    7.810000] 1d40: c3a11d5c c3a11d50 c0008510 c0009ab4 c3a11ddc c3a11d60 c0008eb4 c00084f0
[    7.810000] 1d60: 00000000 00000030 00000000 00000080 60000013 bf08f670 c3806900 c2c38b00
[    7.810000] 1d80: 00000030 c3806930 00000000 c3a11ddc c3a11d88 c3a11da8 c0054190 c00523fc
[    7.810000] 1da0: 60000013 ffffffff c3a11dec c3a11db8 00000000 c2c38b00 bf08f670 c3806900
[    7.810000] 1dc0: 00000000 00000080 c02cc928 00000030 c3a11e0c c3a11de0 c0052764 c00520d8
[    7.810000] 1de0: c3a11dfc 00000000 00000000 00000002 bf090f61 00000004 c02cc930 c02cc928
[    7.810000] 1e00: c3a11e4c c3a11e10 bf090978 c005269c bf090f61 c02cc928 bf093000 c02dd170
[    7.810000] 1e20: c3a11e3c c02cc930 c02cc930 bf0911d0 bf0911d0 bf093000 c3a10000 00000000
[    7.810000] 1e40: c3a11e5c c3a11e50 c0155b7c bf090808 c3a11e7c c3a11e60 c0154690 c0155b6c
[    7.810000] 1e60: c02cc930 c02cc964 bf0911d0 c3a11ea0 c3a11e9c c3a11e80 c015484c c01545e8
[    7.810000] 1e80: 00000000 00000000 c01547e4 bf0911d0 c3a11ec4 c3a11ea0 c0152e58 c01547f4
[    7.810000] 1ea0: c381b88c c384ab10 c2c10540 bf0911d0 00000000 c02d7518 c3a11ed4 c3a11ec8
[    7.810000] 1ec0: c01544c0 c0152e0c c3a11efc c3a11ed8 c01536cc c01544b0 bf091075 c3a11ee8
[    7.810000] 1ee0: bf049af0 bf09120c bf0911d0 00000000 c3a11f1c c3a11f00 c0154e9c c0153628
[    7.810000] 1f00: bf049af0 bf09120c 000ae190 00000000 c3a11f2c c3a11f20 c0155f58 c0154e04
[    7.810000] 1f20: c3a11f44 c3a11f30 bf093054 c0155f1c 00000000 00006a4f c3a11f7c c3a11f48
[    7.810000] 1f40: c0008638 bf093010 bf09120c 000ae190 00000000 c00093c4 00006a4f bf09120c
[    7.810000] 1f60: 000ae190 00000000 c00093c4 00000000 c3a11fa4 c3a11f80 c004fdc4 c000859c
[    7.810000] 1f80: c3a11fa4 000ae190 00006a4f 00016eb8 000ad018 00000080 00000000 c3a11fa8
[    7.810000] 1fa0: c0009260 c004fd58 00006a4f 00016eb8 000ae190 00006a4f 000ae100 00000000
[    7.810000] 1fc0: 00006a4f 00016eb8 000ad018 00000080 000adba0 000ad208 00000000 000ad3d8
[    7.810000] 1fe0: beaf7ae8 beaf7ad8 000172b8 b6e4e940 20000010 000ae190 00000000 00000000
[    7.810000] Backtrace:
[    7.810000] [<c01392bc>] (__gpio_to_irq+0x0/0x40) from [<bf08f694>] (ohci_hcd_at91_overcurrent_irq+0x24/0xb4 [ohci_hcd])
[    7.810000] [<bf08f670>] (ohci_hcd_at91_overcurrent_irq+0x0/0xb4 [ohci_hcd]) from [<c0051264>] (handle_irq_event_percpu+0x38/0x1a8)
[    7.810000]  r6:00000030 r5:c3806900 r4:c2c38b00
[    7.810000] [<c005122c>] (handle_irq_event_percpu+0x0/0x1a8) from [<c005142c>] (handle_irq_event+0x58/0x7c)
[    7.810000] [<c00513d4>] (handle_irq_event+0x0/0x7c) from [<c0053f24>] (handle_simple_irq+0xac/0xd8)
[    7.810000]  r5:c3805a00 r4:c3806900
[    7.810000] [<c0053e78>] (handle_simple_irq+0x0/0xd8) from [<c005120c>] (generic_handle_irq+0x3c/0x48)
[    7.810000]  r4:00000030
[    7.810000] [<c00511d0>] (generic_handle_irq+0x0/0x48) from [<c00124d0>] (gpio_irq_handler+0xa8/0xfc)
[    7.810000]  r4:00000000
[    7.810000] [<c0012428>] (gpio_irq_handler+0x0/0xfc) from [<c005120c>] (generic_handle_irq+0x3c/0x48)
[    7.810000] [<c00511d0>] (generic_handle_irq+0x0/0x48) from [<c0009b08>] (handle_IRQ+0x64/0x88)
[    7.810000]  r4:00000012
[    7.810000] [<c0009aa4>] (handle_IRQ+0x0/0x88) from [<c0008510>] (at91_aic_handle_irq+0x30/0x38)
[    7.810000]  r5:60000013 r4:c00523fc
[    7.810000] [<c00084e0>] (at91_aic_handle_irq+0x0/0x38) from [<c0008eb4>] (__irq_svc+0x34/0x60)
[    7.810000] Exception stack(0xc3a11d60 to 0xc3a11da8)
[    7.810000] 1d60: 00000000 00000030 00000000 00000080 60000013 bf08f670 c3806900 c2c38b00
[    7.810000] 1d80: 00000030 c3806930 00000000 c3a11ddc c3a11d88 c3a11da8 c0054190 c00523fc
[    7.810000] 1da0: 60000013 ffffffff
[    7.810000] [<c00520c8>] (__setup_irq+0x0/0x458) from [<c0052764>] (request_threaded_irq+0xd8/0x134)
[    7.810000] [<c005268c>] (request_threaded_irq+0x0/0x134) from [<bf090978>] (ohci_hcd_at91_drv_probe+0x180/0x41c [ohci_hcd])
[    7.810000] [<bf0907f8>] (ohci_hcd_at91_drv_probe+0x0/0x41c [ohci_hcd]) from [<c0155b7c>] (platform_drv_probe+0x20/0x24)
[    7.810000] [<c0155b5c>] (platform_drv_probe+0x0/0x24) from [<c0154690>] (driver_probe_device+0xb8/0x20c)
[    7.810000] [<c01545d8>] (driver_probe_device+0x0/0x20c) from [<c015484c>] (__driver_attach+0x68/0x88)
[    7.810000]  r7:c3a11ea0 r6:bf0911d0 r5:c02cc964 r4:c02cc930
[    7.810000] [<c01547e4>] (__driver_attach+0x0/0x88) from [<c0152e58>] (bus_for_each_dev+0x5c/0x9c)
[    7.810000]  r6:bf0911d0 r5:c01547e4 r4:00000000
[    7.810000] [<c0152dfc>] (bus_for_each_dev+0x0/0x9c) from [<c01544c0>] (driver_attach+0x20/0x28)
[    7.810000]  r7:c02d7518 r6:00000000 r5:bf0911d0 r4:c2c10540
[    7.810000] [<c01544a0>] (driver_attach+0x0/0x28) from [<c01536cc>] (bus_add_driver+0xb4/0x22c)
[    7.810000] [<c0153618>] (bus_add_driver+0x0/0x22c) from [<c0154e9c>] (driver_register+0xa8/0x144)
[    7.810000]  r7:00000000 r6:bf0911d0 r5:bf09120c r4:bf049af0
[    7.810000] [<c0154df4>] (driver_register+0x0/0x144) from [<c0155f58>] (platform_driver_register+0x4c/0x60)
[    7.810000]  r7:00000000 r6:000ae190 r5:bf09120c r4:bf049af0
[    7.810000] [<c0155f0c>] (platform_driver_register+0x0/0x60) from [<bf093054>] (ohci_hcd_mod_init+0x54/0x8c [ohci_hcd])
[    7.810000] [<bf093000>] (ohci_hcd_mod_init+0x0/0x8c [ohci_hcd]) from [<c0008638>] (do_one_initcall+0xac/0x174)
[    7.810000]  r4:00006a4f
[    7.810000] [<c000858c>] (do_one_initcall+0x0/0x174) from [<c004fdc4>] (sys_init_module+0x7c/0x1a0)
[    7.810000] [<c004fd48>] (sys_init_module+0x0/0x1a0) from [<c0009260>] (ret_fast_syscall+0x0/0x2c)
[    7.810000]  r7:00000080 r6:000ad018 r5:00016eb8 r4:00006a4f
[    7.810000] Code: e24cb004 e59f3028 e1a02000 e7930180 (e5903028)
[    7.810000] ---[ end trace 85aa37ed128143b5 ]---
[    7.810000] Kernel panic - not syncing: Fatal exception in interrupt

Commit 6fffb77c (USB: ohci-at91: fix PIO handling in relation with number of
ports) started setting unused pins to EINVAL. But this exposed a bug in the
ohci_hcd_at91_overcurrent_irq function where the gpio was used without being
checked to see if it is valid.

This patches fixed the issue by adding the gpio valid check.
Signed-off-by: NJoachim Eastwood <joachim.eastwood@jotron.com>
Cc: stable <stable@vger.kernel.org> # [3.4+] whereever 6fffb77c went
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

__user * != * __user
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

This patch
- moves drivers/usb/serial/ezusb.c to drivers/usb/misc/
- renamed CONFIG_USB_EZUSB to CONFIG_USB_EZUSB_FX2 to avoid build errors
- adapts Makefiles and Kconfigs switching from bool to tristate for CONFIG_USB_EZUSB_FX2
Signed-off-by: NRené Bürgel <rene.buergel@sohard.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Streamline control flow so it is easier for gcc to follow which paths
can be taken and which can't.

Fixes "warning: 'cmdinfo' may be used uninitialized in this function"
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Reported-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Forgot to unlock in the uas_eh_task_mgmt error paths.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Reported-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch (as1607) fixes a race that can occur if a USB host
controller is removed while a process is reading the
/sys/kernel/debug/usb/devices file.

The usb_device_read() routine uses the bus->root_hub pointer to
determine whether or not the root hub is registered.  The is not a
valid test, because the pointer is set before the root hub gets
registered and remains set even after the root hub is unregistered and
deallocated.  As a result, usb_device_read() or usb_device_dump() can
access freed memory, causing an oops.

The patch changes the test to use the hcd->rh_registered flag, which
does get set and cleared at the appropriate times.  It also makes sure
to hold the usb_bus_list_lock mutex while setting the flag, so that
usb_device_read() will become aware of new root hubs as soon as they
are registered.
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
Reported-by: NDon Zickus <dzickus@redhat.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add spinlock to protect uas data structures.

[ v2: s/GFP_NOIO/GFP_ATOMIC/, better don't sleep when holding a spinlock ]
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Properly report aborted commands.
Also don't access cmdinfo after kicking task management,
it may not be valid any more once it returns.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Allocate one tag for task management functions and
use it properly.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

When a device with an isochronous endpoint is behind a hub plugged into
the Intel Panther Point xHCI host controller, and the driver submits
multiple frames per URB, the xHCI driver will set the Block Event
Interrupt (BEI) flag on all but the last TD for the URB.  This causes
the host controller to place an event on the event ring, but not send an
interrupt.  When the last TD for the URB completes, BEI is cleared, and
we get an interrupt for the whole URB.

However, under a Panther Point xHCI host controller, if the parent hub
is unplugged when one or more events from transfers with BEI set are on
the event ring, a port status change event is placed on the event ring,
but no interrupt is generated.  This means URBs stop completing, and the
USB device disconnect is not noticed.  Something like a USB headset will
cause mplayer to hang when the device is disconnected.

If another transfer is sent (such as running `sudo lsusb -v`), the next
transfer event seems to "unstick" the event ring, the xHCI driver gets
an interrupt, and the disconnect is reported to the USB core.

The fix is not to use the BEI flag under the Panther Point xHCI host.
This will impact power consumption and system responsiveness, because
the xHCI driver will receive an interrupt for every frame in all
isochronous URBs instead of once per URB.

Intel chipset developers confirm that this bug will be hit if the BEI
flag is used on any endpoint, not just ones that are behind a hub.

This patch should be backported to kernels as old as 3.0, that contain
the commit 69e848c2 "Intel xhci: Support
EHCI/xHCI port switching."
Signed-off-by: NSarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@vger.kernel.org

PHY_CLK_VALID bit doesn't work properly with UTMI PHY.
e.g. This bit is always zero on P5040, etc.
There is no need to check this bit for UTMI PHY, just keep
checking for ULPI PHY to prevent system hanging.

This patch should be squashed into previous commit 3735ba8d
"powerpc/usb: fix bug of CPU hang when missing USB PHY clock"
Signed-off-by: NShengzhou Liu <Shengzhou.Liu@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

TIAO/DIYGADGET USB Multi-Protocol Adapter (TUMPA) is an FTDI FT2232H
based device which provides an easily accessible JTAG, SPI, I2C, serial
breakout.

http://www.diygadget.com/tiao-usb-multi-protocol-adapter-jtag-spi-i2c-serial.html
http://www.tiaowiki.com/w/TIAO_USB_Multi_Protocol_Adapter_User%27s_Manual

FTDI FT2232H provides two serial channels (A and B), but on the TUMPA
channel A is dedicated to JTAG/SPI while channel B can be used for
UART/RS-232: use the ftdi_jtag_quirk to expose only channel B as
a usb-serial interface to userspace.
Signed-off-by: NAntonio Ospite <ospite@studenti.unina.it>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This reverts commit ca9c9d0c.

Rafael wants more time to work on the user api to handle port power
issues, so let's just revert the sysfs changes for now.
Reported-by: NRafael J. Wysocki <rjw@sisk.pl>
Cc: Lan Tianyu <tianyu.lan@intel.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>