If ci_hdrc_host_init() or ci_hdrc_gadget_init() returns error and the
error != -ENXIO, as Peter pointed out, "it stands for initialization
for host or gadget has failed", so we'd better return failure rather
continue.
And before destroying the otg, i.e ci_hdrc_otg_destroy(ci), we should
also check ci->roles[CI_ROLE_GADGET].
Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
In their infinite wisdom, and never ending quest for end user frustration,
Lenovo has decided to use new USB device IDs for the wwan modules in
their 2017 laptops. The actual hardware is still the Sierra Wireless
EM7455 or EM7430, depending on region.
Cc: <stable@vger.kernel.org>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Johan Hovold <johan@kernel.org>
This patch adds a quirk to disable USB 2.0 MAC linestate check
during HS transmit. Refer the dwc3 databook, we can use it for
some special platforms if the linestate not reflect the expected
line state(J) during transmission.
When use this quirk, the controller implements a fixed 40-bit
TxEndDelay after the packet is given on UTMI and ignores the
linestate during the transmit of a token (during token-to-token
and token-to-data IPGAP).
On some rockchip platforms (e.g. rk3399), it requires to disable
the u2mac linestate check to decrease the SSPLIT token to SETUP
token inter-packet delay from 566ns to 466ns, and fix the issue
that FS/LS devices not recognized if inserted through USB 3.0 HUB.
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: William Wu <william.wu@rock-chips.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Since usb phy core has added common code to register or unregister
extcon device, then phy-msm-usb driver does not need its own
code to register/unregister extcon device, then remove them.
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Since usb phy core has added common code to register or unregister
extcon device, then phy-qcom-8x16-usb driver does not need its own
code to register/unregister extcon device, then remove them.
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Usually usb phy need register one extcon device to get the connection
notifications. It will remove some duplicate code if the extcon device
is registered using common code instead of each phy driver having its
own related extcon APIs. So we add one pointer of extcon device into
usb phy structure, and some other helper functions to register extcon.
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
The USB gadget documentation is not at DocBook anymore.
The main file was converted to ReST, and stored at
Documentation/driver-api/usb/gadget.rst, but there are
still several plain text files related to gadget under
Documentation/usb.
So, be generic and just mention documentation
without specifying where it is.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Calculate wMaxPacketSize before endpoint matching the
descriptor is found.
This allows audio gadget to be used with controllers
which have a shortage or unavailability of endpoints
that can handle max packet size of 1023 (FS) or 1024
(HS).
With this audio gadget can be used on TI's OMAP-L138 SoC
which has a MUSB HS controller with endpoints having max
packet size much less than 1023 or 1024. See mode_2_cfg in
drivers/usb/musb/musb_core.c
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Some functions might want to have very, very long request queues. We
can't make any assumptions about how many requests we *are* able to
map, so instead of mapping requests early, let's map them late. This
way, functions can queue as many requests as they'd like but we won't
take DMA resources until they are needed.
Also, we can now stop processing requests when we run out of DMA
resources but still keep requests in the queue for late processing.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
In some situations, e.g. when registering alternate modes for local typec
ports, it may be handy to use constant mode descriptors. Allow this by
changing the mode descriptor arguments of typec_port_register_altmode()
et.al. to using const pointers.
Signed-off-by: Mats Karrman <mats.dev.list@gmail.com>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Check that req->buf is a valid DMA capable address, produce a warning
and return an error if it's either coming from vmalloc space or is an on
stack buffer.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Update usb_hcd_map_urb_for_dma() to check for an URB's setup_packet and
transfer_buffer sanity. We first check that urb->setup_packet is neither
coming from vmalloc space nor is an on stack buffer, and if that's the
case, produce a warning and return an error. For urb->transfer_buffer
there is an existing is_vmalloc_addr() check so we just supplement that
with an object_is_on_stack() check, produce a warning if that is the case
and also return an error.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We don't need a big fat warning with stack dump at all. Running out of
TRBs is a normal condition and we will have more TRBs available as
soon as some transfers complete.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Use the new define for the maximum number of SuperSpeed ports instead of
a constant when allocating xHCI root hubs.
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add define for the maximum number of ports on a SuperSpeed hub as per
USB 3.1 spec Table 10-5, and use it when verifying the retrieved hub
descriptor.
This specifically avoids benign attempts to update the DeviceRemovable
mask for non-existing ports (should we get that far).
Fixes: dbe79bbe9d ("USB 3.0 Hub Changes")
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add missing sanity check on the non-SuperSpeed hub-descriptor length in
order to avoid parsing and leaking two bytes of uninitialised slab data
through sysfs removable-attributes (or a compound-device debug
statement).
Note that we only make sure that the DeviceRemovable field is always
present (and specifically ignore the unused PortPwrCtrlMask field) in
order to continue support any hubs with non-compliant descriptors. As a
further safeguard, the descriptor buffer is also cleared.
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Cc: stable <stable@vger.kernel.org> # 2.6.12
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
A SuperSpeed hub descriptor does not have any variable-length fields so
bail out when reading a short descriptor.
This avoids parsing and leaking two bytes of uninitialised slab data
through sysfs removable-attributes.
Fixes: dbe79bbe9d ("USB 3.0 Hub Changes")
Cc: stable <stable@vger.kernel.org> # 2.6.39
Cc: John Youn <John.Youn@synopsys.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix up the root-hub descriptor to accommodate the variable-length
DeviceRemovable and PortPwrCtrlMask fields, while marking all ports as
removable (and leaving the reserved bit zero unset).
Also add a build-time constraint on VHCI_HC_PORTS which must never be
greater than USB_MAXCHILDREN (but this was only enforced through a
KConfig constant).
This specifically fixes the descriptor layout whenever VHCI_HC_PORTS is
greater than seven (default is 8).
Fixes: 04679b3489 ("Staging: USB/IP: add client driver")
Cc: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>
Cc: Valentina Manea <valentina.manea.m@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Flag the first and only port as removable while also leaving the
remaining bits (including the reserved bit zero) unset in accordance
with the specifications:
"Within a byte, if no port exists for a given location, the bit
field representing the port characteristics shall be 0."
Also add a comment marking the legacy PortPwrCtrlMask field.
Fixes: 1cd8fd2887 ("usb: gadget: dummy_hcd: add SuperSpeed support")
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Cc: Tatyana Brokhman <tlinder@codeaurora.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Document that the new companion-device lookup helper takes a reference
to the companion device which needs to be dropped after use.
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If multiple endpoints on a single device have pending IN URBs and one
endpoint times out due to NAKs (perfectly legal), select a different
endpoint URB to try.
The existing code only checked to see another device address has pending
URBs and ignores other IN endpoints on the current device address. This
leads to endpoints never getting serviced if one endpoint is using NAK as
a flow control method.
Fixes: 5d3043586d ("usb: r8a66597-hcd: host controller driver for R8A6659")
Signed-off-by: Chris Brandt <chris.brandt@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The timeout for BULK packets was 300ms which is a long time if other
endpoints or devices are waiting for their turn. Changing it to 50ms
greatly increased the overall performance for multi-endpoint devices.
Fixes: 5d3043586d ("usb: r8a66597-hcd: host controller driver for R8A6659")
Signed-off-by: Chris Brandt <chris.brandt@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Drop erroneous le16_to_cpu when returning the USB device speed which is
already in host byte order.
Found using sparse:
warning: cast to restricted __le16
Fixes: 946b960d13 ("USB: add driver for iowarrior devices.")
Cc: stable <stable@vger.kernel.org> # 2.6.21
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
After commit d705ff3818 (tty: vt, cleanup and document con_scroll), in
the coccinelle output, we can see:
drivers/usb/misc/sisusbvga/sisusb_con.c:852:8-9: WARNING: return of 0/1 in function 'sisusbcon_scroll_area' with return type bool
Return true instead of 1 in the function returning bool which was
intended to do in d705ff3818 but omitted.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Fixes: d705ff3818 (tty: vt, cleanup and document con_scroll)
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Format specifier %p can leak kernel addresses while not valuing the
kptr_restrict system settings. When kptr_restrict is set to (1), kernel
pointers printed using the %pK format specifier will be replaced with
Zeros. Debugging Note : &pK prints only Zeros as address. If you need
actual address information, write 0 to kptr_restrict.
echo 0 > /proc/sys/kernel/kptr_restrict
[Found by poking around in a random vendor kernel tree, it would be nice
if someone would actually send these types of patches upstream - gkh]
Signed-off-by: Vamsi Krishna Samavedam <vskrishn@codeaurora.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The ene_usb6250 sub-driver in usb-storage does USB I/O to buffers on
the stack, which doesn't work with vmapped stacks. This patch fixes
the problem by allocating a separate 512-byte buffer at probe time and
using it for all of the offending I/O operations.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-and-tested-by: Andreas Hartmann <andihartmann@01019freenet.de>
CC: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch adds support for recognition of ARM-USB-TINY(H) devices which
are almost identical to ARM-USB-OCD(H) but lacking separate barrel jack
and serial console.
By suggestion from Johan Hovold it is possible to replace
ftdi_jtag_quirk with a bit more generic construction. Since all
Olimex-ARM debuggers has exactly two ports, we could safely always use
only second port within the debugger family.
Signed-off-by: Andrey Korolyov <andrey@xdel.ru>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Function devm_clk_get() returns an ERR_PTR when it fails. However, in
function kdwc3_probe(), its return value is not checked, which may
result in a bad memory access bug. This patch fixes the bug.
Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Companion descriptor is only used for SuperSpeed endpoints,
if the endpoints are HighSpeed or FullSpeed, the Companion
descriptor will not allocated, so we can only access it if
gadget is SuperSpeed.
I can reproduce this issue on Rockchip platform rk3368 SoC
which supports USB 2.0, and use functionfs for ADB. Kernel
build with CONFIG_KASAN=y and CONFIG_SLUB_DEBUG=y report
the following BUG:
==================================================================
BUG: KASAN: slab-out-of-bounds in ffs_func_set_alt+0x224/0x3a0 at addr ffffffc0601f6509
Read of size 1 by task swapper/0/0
============================================================================
BUG kmalloc-256 (Not tainted): kasan: bad access detected
----------------------------------------------------------------------------
Disabling lock debugging due to kernel taint
INFO: Allocated in ffs_func_bind+0x52c/0x99c age=1275 cpu=0 pid=1
alloc_debug_processing+0x128/0x17c
___slab_alloc.constprop.58+0x50c/0x610
__slab_alloc.isra.55.constprop.57+0x24/0x34
__kmalloc+0xe0/0x250
ffs_func_bind+0x52c/0x99c
usb_add_function+0xd8/0x1d4
configfs_composite_bind+0x48c/0x570
udc_bind_to_driver+0x6c/0x170
usb_udc_attach_driver+0xa4/0xd0
gadget_dev_desc_UDC_store+0xcc/0x118
configfs_write_file+0x1a0/0x1f8
__vfs_write+0x64/0x174
vfs_write+0xe4/0x200
SyS_write+0x68/0xc8
el0_svc_naked+0x24/0x28
INFO: Freed in inode_doinit_with_dentry+0x3f0/0x7c4 age=1275 cpu=7 pid=247
...
Call trace:
[<ffffff900808aab4>] dump_backtrace+0x0/0x230
[<ffffff900808acf8>] show_stack+0x14/0x1c
[<ffffff90084ad420>] dump_stack+0xa0/0xc8
[<ffffff90082157cc>] print_trailer+0x188/0x198
[<ffffff9008215948>] object_err+0x3c/0x4c
[<ffffff900821b5ac>] kasan_report+0x324/0x4dc
[<ffffff900821aa38>] __asan_load1+0x24/0x50
[<ffffff90089eb750>] ffs_func_set_alt+0x224/0x3a0
[<ffffff90089d3760>] composite_setup+0xdcc/0x1ac8
[<ffffff90089d7394>] android_setup+0x124/0x1a0
[<ffffff90089acd18>] _setup+0x54/0x74
[<ffffff90089b6b98>] handle_ep0+0x3288/0x4390
[<ffffff90089b9b44>] dwc_otg_pcd_handle_out_ep_intr+0x14dc/0x2ae4
[<ffffff90089be85c>] dwc_otg_pcd_handle_intr+0x1ec/0x298
[<ffffff90089ad680>] dwc_otg_pcd_irq+0x10/0x20
[<ffffff9008116328>] handle_irq_event_percpu+0x124/0x3ac
[<ffffff9008116610>] handle_irq_event+0x60/0xa0
[<ffffff900811af30>] handle_fasteoi_irq+0x10c/0x1d4
[<ffffff9008115568>] generic_handle_irq+0x30/0x40
[<ffffff90081159b4>] __handle_domain_irq+0xac/0xdc
[<ffffff9008080e9c>] gic_handle_irq+0x64/0xa4
...
Memory state around the buggy address:
ffffffc0601f6400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffffc0601f6480: 00 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc
>ffffffc0601f6500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffffffc0601f6580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffffffc0601f6600: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
==================================================================
Signed-off-by: William Wu <william.wu@rock-chips.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Check for bad pointer that may result because of kthread_create failure.
This check is needed since the gserial setup callback function
(gs_console_setup()) is only freeing the info->con_buf in case of
kthread_create failure which will result into bad info->console_thread
pointer.
Without checking info->console_thread pointer validity in the
gserial_console_exit() function, before calling kthread_stop(), the
rmmod will generate Kernel Oops.
Signed-off-by: Bogdan Mirea <Bogdan-Stefan_mirea@mentor.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
The dwc3 driver can overwite its previous events if its top-half IRQ
handler (TH) gets invoked again before processing the events in the
cache. We see this as a hang in the file transfer and the host will
attempt to reset the device. TH gets the event count and deasserts the
interrupt line by writing DWC3_GEVNTSIZ_INTMASK to DWC3_GEVNTSIZ. If
there's a new event coming between reading the event count and interrupt
deassertion, dwc3 will lose previous pending events. More generally, we
will see 0 event count, which should not affect anything.
This shouldn't be possible in the current dwc3 implementation. However,
through testing and reading the PCIe trace, the TH occasionally still
gets invoked one more time after HW interrupt deassertion. (With PCIe
legacy interrupts, TH is called repeatedly as long as the interrupt line
is asserted). We suspect that there is a small detection delay in the
SW.
To avoid this issue, Check DWC3_EVENT_PENDING flag to determine if the
events are processed in the bottom-half IRQ handler. If not, return
IRQ_HANDLED and don't process new event.
Cc: stable@vger.kernel.org
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Commit 08a36b5438 ("usb: dwc3: gadget: simplify __dwc3_gadget_ep_queue()")
caused a small change in the way ISO transfer is handled in the case
when XferInProgress event happens on Isoc EP with an active transfer.
This caused a performance degradation of 50%. e.g. using g_webcam on DUT
and luvcview on host the video frame rate dropped from 16fps to 8fps
@high-speed.
Make the ISO transfer handling equivalent to that prior to that commit
to get back the original ISO performance numbers.
Fixes: 08a36b5438 ("usb: dwc3: gadget: simplify __dwc3_gadget_ep_queue()")
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This patch reworks the way f_mass_storage.c handles memory barriers
and synchronization:
The driver now uses a wait_queue instead of doing its own
task-state manipulations (even though only one task will ever
use the wait_queue).
The thread_wakeup_needed variable is removed. It was only a
source of trouble; although it was what the driver tested to
see whether it should wake up, what we really wanted to see
was whether a USB transfer had completed.
All the explicit memory barriers scattered throughout the
driver are replaced by a few calls to smp_load_acquire() and
smp_store_release().
The inreq_busy and outreq_busy fields are removed. In their
place, the driver keeps track of the current I/O direction by
splitting BUF_STATE_BUSY into two states: BUF_STATE_SENDING
and BUF_STATE_RECEIVING.
The buffer states are no longer protected by a lock. Mutual
exclusion isn't needed; the state is changed only by the
driver's main thread when it owns the buffer, and only by the
request completion routine when the gadget core owns the buffer.
The do_write() and throw_away_data() routines were reorganized
to make efficient use of the new sleeping mechanism. This
resulted in the removal of one indentation level in those
routines, making the patch appear to be more more complicated
than it really is.
In a few places, the driver allowed itself to be frozen although
it really shouldn't have (in the middle of executing a SCSI
command). Those places have been fixed.
The logic in the exception handler for aborting transfers and
waiting for them to stop has been simplified.
Tested-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This patch makes several adjustments to the way f_mass_storage.c
handles its internal state and asynchronous notifications (AKA
exceptions):
A number of states weren't being used for anything.
They are removed.
The FSG_STATE_IDLE state was renamed to FSG_STATE_NORMAL,
because it now applies whenever the gadget is operating
normally, not just when the gadget is idle.
The FSG_STATE_RESET state was renamed to
FSG_STATE_PROTOCOL_RESET, indicating that it represents a
Bulk-Only Transport protocol reset and not a general USB
reset.
When a signal arrives, it's silly for the signal handler to
send itself another signal! Now it takes care of everything
inline.
Along with an assortment of other minor changes in the same category.
Tested-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Fix a division-by-zero in set_termios when debugging is enabled and a
high-enough speed has been requested so that the divisor value becomes
zero.
Instead of just fixing the offending debug statement, cap the baud rate
at the base as a zero divisor value also appears to crash the firmware.
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Cc: stable <stable@vger.kernel.org> # 2.6.12
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Drop erroneous cpu_to_le32 when setting the baud rate, something which
corrupted the divisor on big-endian hosts.
Found using sparse:
warning: incorrect type in argument 1 (different base types)
expected unsigned int [unsigned] [usertype] val
got restricted __le32 [usertype] <noident>
Fixes: af2ac1a091 ("USB: serial mct_usb232: move DMA buffers to heap")
Cc: stable <stable@vger.kernel.org> # 2.6.34
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-By: Pete Zaitcev <zaitcev@yahoo.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
