Mart reported a deadlock in -RT in the call path:
hci_send_monitor_ctrl_event() -> hci_send_to_channel()
because both functions acquire the same read lock hci_sk_list.lock. This
is also a mainline issue because the qrwlock implementation is writer
fair (the traditional rwlock implementation is reader biased).
To avoid the deadlock there is now __hci_send_to_channel() which expects
the readlock to be held.
Fixes: 38ceaa00d0 ("Bluetooth: Add support for sending MGMT commands and events to monitor")
Reported-by: Mart van de Wege <mvdwege@gmail.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This patch increases the connection timeout for LE connections that are
triggered by the advertising report to 4 seconds.
It has been observed that devices equipped with wifi+bt combo SoC fail
to create a connection with BLE devices due to their coexistence issues.
Increasing this timeout gives them enough time to complete the
connection with success.
Signed-off-by: Konrad Zapałowicz <konrad.zapalowicz@canonical.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Introduce ath_vendor_cmd function which can be used to
configure 'tags' and patch the firmware.
ATH vendor command has the following format:
| OPCODE (u8) | INDEX (LE16) | DLEN (U8) | DATA (U8 * DLEN) |
BD address configuration tag is at index 0x0001.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
If command is added to req then it should be freed in case if
hdev is down or HCI_ADVERTISING flag is set.
This introduces a helper in hci_request to purge the cmd_q
to make cmd_q internal to hci_request which is used to fix
the leak.
This also replace accessing of cmd_q in hci_conn with the
new helper.
Signed-off-by: Jaganath Kanakkassery <jaganathx.kanakkassery@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Commit dec2c92880 ("Bluetooth: hci_ldisc:
Use rwlocking to avoid closing proto races") introduced locks in
hci_ldisc that are held while calling the proto functions. These locks
are rwlock's, and hence do not allow sleeping while they are held.
However, the proto functions that hci_bcm registers use mutexes and
hence need to be able to sleep.
In more detail: hci_uart_tty_receive() and hci_uart_dequeue() both
acquire the rwlock, after which they call proto->recv() and
proto->dequeue(), respectively. In the case of hci_bcm these point to
bcm_recv() and bcm_dequeue(). The latter both acquire the
bcm_device_lock, which is a mutex, so doing so results in a call to
might_sleep(). But since we're holding a rwlock in hci_ldisc, that
results in the following BUG (this for the dequeue case - a similar
one for the receive case is omitted for brevity):
BUG: sleeping function called from invalid context at kernel/locking/mutex.c
in_atomic(): 1, irqs_disabled(): 0, pid: 7303, name: kworker/7:3
INFO: lockdep is turned off.
CPU: 7 PID: 7303 Comm: kworker/7:3 Tainted: G W OE 4.13.2+ #17
Hardware name: Apple Inc. MacBookPro13,3/Mac-A5C67F76ED83108C, BIOS MBP133.8
Workqueue: events hci_uart_write_work [hci_uart]
Call Trace:
dump_stack+0x8e/0xd6
___might_sleep+0x164/0x250
__might_sleep+0x4a/0x80
__mutex_lock+0x59/0xa00
? lock_acquire+0xa3/0x1f0
? lock_acquire+0xa3/0x1f0
? hci_uart_write_work+0xd3/0x160 [hci_uart]
mutex_lock_nested+0x1b/0x20
? mutex_lock_nested+0x1b/0x20
bcm_dequeue+0x21/0xc0 [hci_uart]
hci_uart_write_work+0xe6/0x160 [hci_uart]
process_one_work+0x253/0x6a0
worker_thread+0x4d/0x3b0
kthread+0x133/0x150
We can't replace the mutex in hci_bcm, because there are other calls
there that might sleep. Therefore this replaces the rwlock's in
hci_ldisc with rw_semaphore's (which allow sleeping). This is a safer
approach anyway as it reduces the restrictions on the proto callbacks.
Also, because acquiring write-lock is very rare compared to acquiring
the read-lock, the percpu variant of rw_semaphore is used.
Lastly, because hci_uart_tx_wakeup() may be called from an IRQ context,
we can't block (sleep) while trying acquire the read lock there, so we
use the trylock variant.
Signed-off-by: Ronald Tschalär <ronald@innovation.ch>
Reviewed-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
In this particular case, notice that I replaced the
"deliberate fall-through..." comment with a "fall through"
comment, which is what GCC is expecting to find.
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Commit 9834e586fa ("Bluetooth: btusb: Add workaround for Broadcom devices
without product id") was added to deal with the BT part of the BCM4356A2
on GPD pocket laptops having an usb vid:pid of 0000:0000.
After another commit to add support for the BCM UART connected BT ACPI-id
BCM2E7E used on the GPD win, it turns out that the BT on the GPD pocket is
connected via both USB and UART. Adding support for the BCM2E7E ACPI-id
causes it to switch to UART mode.
The Windows shipped with the device is using it in UART mode and the
presence of the BCM2E7E ACPI-id combined with the all 0 USB vid:pid
indicates that the BT part was never meant to be used in USB mode.
With the recent patches to use serdev device enumeration / instantiation
for UART attached ACPI enumerated BT devices, everything work OOTB in UART
mode and the workaround for the all 0 USB vid:pid is no longer needed.
This reverts commit 9834e586fa ("Bluetooth: btusb: Add workaround for
Broadcom devices without product id").
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Tested on a GPD win with a BCM4356 PCI-E wifi/bt combo card.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This patch adds the device ID for the bluetooth chip used in the
Broadcom BCM4356 PCI-E WiFi / UART BT chip.
Successfully tested using Firmware version 0273
The upper nibble of the rev field is 2 on this device, so this commit
also adds handling of 2 to the switch-case done on the upper nibble.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
It is no longer possible to build BT_HCIUART into the kernel
when SERIAL_DEV_BUS is a loadable module, even if none of the
SERIAL_DEV_BUS based implementations are selected:
drivers/bluetooth/hci_ldisc.o: In function `hci_uart_set_flow_control':
hci_ldisc.c:(.text+0xb40): undefined reference to `serdev_device_set_flow_control'
hci_ldisc.c:(.text+0xb5c): undefined reference to `serdev_device_set_tiocm'
This adds a dependency to avoid the broken configuration.
Fixes: 7841d55480 ("Bluetooth: hci_uart_set_flow_control: Fix NULL deref when using serdev")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This was introduced by the rework adding PM support:
drivers/bluetooth/hci_bcm.c: In function 'bcm_device_exists':
drivers/bluetooth/hci_bcm.c:156:22: error: 'struct bcm_device' has no member named 'hu'
if (device && device->hu && device->hu->serdev)
^~
The pointer is not available otherwise, so I'm enclosing
all references in an #ifdef here.
Fixes: 8a92056837 ("Bluetooth: hci_bcm: Add (runtime)pm support to the serdev driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
The MINIX NEO Z83-4 and MINIX NEO Z83-4 Pro devices use an AP6255 chip
for wifi and bluetooth. Bluetooth requires an ACPI device id of BCM2EA4
with BCM4345 rev C0 firmware.
This patch defines the firmware subversion.
Signed-off-by: Ian W MORRISON <ianwmorrison@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
The hci_bcm platform-device hack which was used to implement
power management for ACPI devices is being replaced by a
serial-device-bus implementation.
Unfortunately, when the corresponding change to the ACPI code lands (a
change that will stop enumerating and registering the serial-device-node
child as a platform device) PM will break silently unless serdev
TTY-port controller support has been enabled. Specifically, hciattach
(btattach) would still succeed, but power management would no longer
work.
Although this is strictly a runtime dependency, let's make the driver
depend on SERIAL_DEV_CTRL_TTYPORT, which is the particular serdev
controller implementation used by the ACPI devices currently managed by
this driver, to avoid breaking PM without anyone noticing.
Note that the driver already has a (build-time) dependency on the serdev
bus code.
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
As the overwriting of IRQ polarity to active low occurs during the driver
probe using 'bt_dev_warn' to display the warning results in '(null)' being
displayed for the device. This patch uses 'dev_warn' to correctly display
the device in the warning instead.
Signed-off-by: Ian W MORRISON <ianwmorrison@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
CC net/bluetooth/selftest.o
net/bluetooth/selftest.c: In function ‘bt_selftest_init’:
net/bluetooth/selftest.c:246:3: warning: ‘duration’ may be used uninitialized in this function [-Wmaybe-uninitialized]
snprintf(test_ecdh_buffer, sizeof(test_ecdh_buffer),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"PASS (%llu usecs)\n", duration);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
net/bluetooth/selftest.c:203:21: note: ‘duration’ was declared here
unsigned long long duration;
^~~~~~~~
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly. As already done in hci_qca, add
struct hci_uart pointer to priv structure.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Make the serdev driver use struct bcm_device as its driver data and share
all the pm / GPIO / IRQ related code paths with the platform driver.
After this commit the 2 drivers are in essence the same and the serdev
driver interface can be used for all ACPI enumerated HCI UARTs.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Use dev_get_drvdata instead of platform_get_drvdata in the suspend /
resume functions. This is a preparation patch for adding (runtime)pm
support to the serdev path.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
The ACPI subsys is going to move over to instantiating ACPI enumerated
HCIs as serdevs, rather then as platform devices.
So we need to make bcm_acpi_probe() suitable for use on non platform-
devices too, which means that we cannot rely on platform_get_irq()
getting called.
This commit modifies bcm_acpi_probe() to directly get the irq from
the ACPI resources, this is a preparation patch for adding (runtime)pm
support to the serdev path.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
After our previous changes, there is nothing platform specific about
bcm_platform_probe anymore, rename it to bcm_get_resources.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
The ACPI subsys is going to move over to instantiating ACPI enumerated
HCIs as serdevs, rather then as platform devices.
This means that the serdev driver paths of hci_bcm.c also need to start
supporting (runtime)pm through GPIOs and a host-wake IRQ.
The hci_bcm code is already mostly independent of how the HCI gets
instantiated, but even though the code only cares about pdev->dev, it
was storing pdev itself in struct bcm_device.
This commit stores pdev->dev rather then pdev in struct bcm_device, this
is a preparation patch for adding (runtime)pm support to the serdev path.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
The ACPI subsys is going to move over to instantiating ACPI enumerated
HCIs as serdevs, rather then as platform devices.
Most of the code in bcm_platform_probe is actually not platform
specific and will work with any struct device passed to it, the one
platform specific call in bcm_platform_probe is platform_get_irq.
This commit moves platform_get_irq call to the platform-driver's bcm_probe
function, this is a preparation patch for adding (runtime)pm support to
the serdev path.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Since bcm_acpi_probe calls bcm_platform_probe, bcm_probe always ends up
calling bcm_platform_probe.
This commit simplifies things by making bcm_probe always call
bcm_platform_probe itself.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit fixes 2 issues with host-wake irq trigger type handling
in hci_bcm:
1) bcm_setup_sleep sets sleep_params.host_wake_active based on
bcm_device.irq_polarity, but bcm_request_irq was always requesting
IRQF_TRIGGER_RISING as trigger type independent of irq_polarity.
This was a problem when the irq is described as a GpioInt rather then
an Interrupt in the DSDT as for GpioInt-s the value passed to request_irq
is honored. This commit fixes this by requesting the correct trigger
type depending on bcm_device.irq_polarity.
2) bcm_device.irq_polarity was used to directly store an ACPI polarity
value (ACPI_ACTIVE_*). This is undesirable because hci_bcm is also
used with device-tree and checking for something like ACPI_ACTIVE_LOW
in a non ACPI specific function like bcm_request_irq feels wrong.
This commit fixes this by renaming irq_polarity to irq_active_low
and changing its type to a bool.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Fix a NULL pointer deref (hu->tty) when calling hci_uart_set_flow_control
on hci_uart-s using serdev.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
That Bluetooth SMP knows about the private key is pointless, since the
detection of debug key usage is actually via the public key portion.
With this patch, the Bluetooth SMP will stop keeping a copy of the
ecdh private key and will let the crypto subsystem to generate and
handle the ecdh private key, potentially benefiting of hardware
ecc private key generation and retention.
The loop that tries to generate a correct private key is now removed and
we trust the crypto subsystem to generate a correct private key. This
backup logic should be done in crypto, if really needed.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
tmp buffer contains the swapped private key. In case the setkey call
failed, the tmp buffer was freed without clearing the private key.
Zeroize the temporary buffer so we don't leak the private key.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
ecdh_helper functions were hiding the error codes and chose to return
the return value of an relational operator, "==". Remove the unnecessary
query and reveal the error codes.
While updating the return values, code in a way that compilers will
warn in case of uninitialized err.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Before this change, a new crypto tfm was allocated, each time,
for both key generation and shared secret computation.
Allocate a single tfm for both cases.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
pr_err(), dev_err() and pr_info() messages should terminated with
a new-line to avoid other messages being concatenated onto the end.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
All older compiler versions up to gcc-4.9 produce these
harmless warnings:
drivers/net/ieee802154/ca8210.c: In function 'ca8210_skb_tx':
drivers/net/ieee802154/ca8210.c:1947:9: warning: missing braces around initializer [-Wmissing-braces]
This changes the syntax to something that works on all versions
without warnings.
Fixes: ded845a781 ("ieee802154: Add CA8210 IEEE 802.15.4 device driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Retrieve BD address from the local-bd-address property.
This address must be unique and is usually added in the DT
by the bootloader which has access to the provisioned data.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Add optional local-bd-address property which is a 6-byte array
storing the assigned BD address. Since having a unique BD address
is critical, a per-device property value should be allocated.
This property is usually added by the boot loader which has access
to the provisioned data.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
In the same way as Ethernet, gather the Bluetooth related bindings in
one file. Introduce the bluetooth-bd-address property which can be used
to store the assigned BD address.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This patch implements the hdev setup function since wcnss-bt does not have
persistent memory to store an allocated BD address. The device is therefore
marked as unconfigured if no BD address has been previously retrieved.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: stable@vger.kernel.org
- bump version strings, by Simon Wunderlich
- Cleanup patches to make checkpatch happy, by Sven Eckelmann (3 patches)
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Merge tag 'batadv-next-for-davem-20171006' of git://git.open-mesh.org/linux-merge
Simon Wunderlich says:
====================
This cleanup patchset includes the following patches:
- bump version strings, by Simon Wunderlich
- Cleanup patches to make checkpatch happy, by Sven Eckelmann (3 patches)
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Use pci_ari_enabled() from the PCI core instead of the identical local copy
bnx2x_ari_enabled(). No functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jesper Dangaard Brouer says:
====================
Improve xdp_monitor samples/bpf
Here are some improvements to the xdp_monitor tool currently located
under samples/bpf/. Once the tools library libbpf become more feature
complete, xdp_monitor should be converted to use it, and be moved into
tools/bpf/xdp/ or tools/xdp/.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Other concurrent running programs, like perf or the XDP program what
needed to be monitored, might take up part of the max locked memory
limit. Thus, the xdp_monitor tool have to set the RLIMIT_MEMLOCK to
RLIM_INFINITY, as it cannot determine a more sane limit.
Using the man exit(3) specified EXIT_FAILURE return exit code, and
correct other users too.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Also monitor the tracepoint xdp_exception. This tracepoint is usually
invoked by the drivers. Programs themselves can activate this by
returning XDP_ABORTED, which will drop the packet but also trigger the
tracepoint. This is useful for distinguishing intentional (XDP_DROP)
vs. ebpf-program error cases that cased a drop (XDP_ABORTED).
Drivers also use this tracepoint for reporting on XDP actions that are
unknown to the specific driver. This can help the user to detect if a
driver e.g. doesn't implement XDP_REDIRECT yet.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The first 8 bytes of the tracepoint context struct are not accessible
by the bpf code. This is a choice that dates back to the original
inclusion of this code.
See explaination in:
commit 98b5c2c65c ("perf, bpf: allow bpf programs attach to tracepoints")
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Simon Horman says:
====================
nfp: extend match and action for flower offload
Pieter says:
This series extends flower offload match and action capabilities. It
specifically adds offload capabilities for matching on MPLS, TTL, TOS
and flow label. Furthermore offload capabilities for action have been
expanded to include set ethernet, ipv4, ipv6, tcp and udp headers.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Previously we did not have offloading support for set TCP/UDP actions. This
patch enables TC flower offload of set TCP/UDP sport and dport actions.
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Previously we did not have offloading support for set IPv6 actions. This
patch enables TC flower offload of set IPv6 src and dst address actions.
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Previously we did not have offloading support for set IPv4 actions. This
patch enables TC flower offload of set IPv4 src and dst address actions.
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Previously we did not have offloading support for set ethernet actions.
This patch enables TC flower offload of set ethernet actions.
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Previously matching on IPv6 ttl and tos fields were not offloaded. This
patch enables offloading IPv6 ttl and tos as match fields.
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Sebastian Andrzej Siewior