| Age | Commit message (Collapse) | Author |
|---|
|
mcp251xfd_chip_rx_int_enable()
This patch fixes the error handling for mcp251xfd_chip_rx_int_enable().
Instead just returning the error, properly shut down the chip.
Link: https://lore.kernel.org/all/20211106201526.44292-2-mkl@pengutronix.de
Fixes: 55e5b97f003e ("can: mcp25xxfd: add driver for Microchip MCP25xxFD SPI CAN")
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
can_rx_offload_threaded_irq_finish() in case of bus off
The function can_rx_offload_threaded_irq_finish() is needed to trigger
the NAPI thread to deliver read CAN frames to the networking stack.
This patch adds the missing call to can_rx_offload_threaded_irq_finish()
in case of a bus off, before leaving the interrupt handler to avoid
packet starvation.
Link: https://lore.kernel.org/all/20211106201526.44292-1-mkl@pengutronix.de
Fixes: 30bfec4fec59 ("can: rx-offload: can_rx_offload_threaded_irq_finish(): add new function to be called from threaded interrupt")
Cc: stable@vger.kernel.org
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
With the patch 07ff4aed015c ("time/timecounter: Mark 1st argument of
timecounter_cyc2time() as const") some instances of the struct
mcp251xfd_priv can be marked as const. This patch marks these as
const.
Link: https://lore.kernel.org/r/20210813091027.159379-1-mkl@pengutronix.de
Cc: Manivannan Sadhasivam <mani@kernel.org>
Cc: Thomas Kopp <thomas.kopp@microchip.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
Conflicting commits, all resolutions pretty trivial:
drivers/bus/mhi/pci_generic.c
5c2c85315948 ("bus: mhi: pci-generic: configurable network interface MRU")
56f6f4c4eb2a ("bus: mhi: pci_generic: Apply no-op for wake using sideband wake boolean")
drivers/nfc/s3fwrn5/firmware.c
a0302ff5906a ("nfc: s3fwrn5: remove unnecessary label")
46573e3ab08f ("nfc: s3fwrn5: fix undefined parameter values in dev_err()")
801e541c79bb ("nfc: s3fwrn5: fix undefined parameter values in dev_err()")
MAINTAINERS
7d901a1e878a ("net: phy: add Maxlinear GPY115/21x/24x driver")
8a7b46fa7902 ("MAINTAINERS: add Yasushi SHOJI as reviewer for the Microchip CAN BUS Analyzer Tool driver")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
The hi3110_cmd() is supposed to return zero on success and negative
error codes on failure, but it was accidentally declared as a u8 when
it needs to be an int type.
Fixes: 57e83fb9b746 ("can: hi311x: Add Holt HI-311x CAN driver")
Link: https://lore.kernel.org/r/20210729141246.GA1267@kili
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
The driver's IRQ handler supports shared IRQs, so request a shared IRQ
handler.
Link: https://lore.kernel.org/r/20210724205212.737328-1-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
The driver is neither dependent on OF, nor it requires any OF headers.
Fix header block to clarify independence from OF.
Link: https://lore.kernel.org/r/http://lore.kernel.org/r/20210531084444.1785397-2-mkl@pengutronix.de
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
In some configurations, mainly ACPI-based, the clock frequency of the
device is supplied by very well established 'clock-frequency'
property. Hence, try to get it from the property at last if no other
providers are available.
Link: https://lore.kernel.org/r/20210531084444.1785397-1-mkl@pengutronix.de
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
be called from threaded interrupt
After reading all CAN frames from the controller in the IRQ handler
and storing them into a skb_queue, the driver calls napi_schedule().
In the napi poll function the skb from the skb_queue are then pushed
into the networking stack.
However if napi_schedule() is called from a threaded IRQ handler this
triggers the following error:
| NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08!!!
To avoid this, create a new rx-offload
function (can_rx_offload_threaded_irq_finish()) with a call to
local_bh_disable()/local_bh_enable() around the napi_schedule() call.
Convert all drivers that call can_rx_offload_irq_finish() from
threaded IRQ context to can_rx_offload_threaded_irq_finish().
Link: https://lore.kernel.org/r/20210724204745.736053-4-mkl@pengutronix.de
Suggested-by: Daniel Glöckner <dg@emlix.com>
Tested-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
Adding a skb to the skb_queue in rx-offload requires to take a lock.
This commit avoids this by adding an unlocked skb queue that is
appended at the end of the ISR. Having one lock at the end of the ISR
should be OK as the HW is empty, not about to overflow.
Link: https://lore.kernel.org/r/20210724204745.736053-2-mkl@pengutronix.de
Tested-by: Oleksij Rempel <o.rempel@pengutronix.de>
Co-developed-by: Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be>
Signed-off-by: Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
In case an error occurred in the IRQ handler, the chip status is
dumped via devcoredump and all IRQs are disabled, but the chip stays
powered for further analysis.
The chip is in an undefined state and will not receive any CAN frames,
so shut down the timestamping worker, which reads the TBC register
regularly, too. This avoids any CRC read error messages if there is a
communication problem with the chip.
Fixes: efd8d98dfb90 ("can: mcp251xfd: add HW timestamp infrastructure")
Link: https://lore.kernel.org/r/20210724155131.471303-1-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
This patch fixes the following clang warning, by marking the functions
as maybe unused. gcc doesn't complain about unused inline functions.
| drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c:564:1: warning: unused function 'mcp251xfd_chip_set_mode_nowait' [-Wunused-function]
| mcp251xfd_chip_set_mode_nowait(const struct mcp251xfd_priv *priv,
| ^
| 1 warning generated.
Link: https://lore.kernel.org/r/20210514153741.1958041-3-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
This patch silences the following clang warning:
| drivers/net/can/spi/mcp251x.c:1333:17: warning: cast to smaller integer type
| 'enum mcp251x_model' from 'const void *' [-Wvoid-pointer-to-enum-cast]
| priv->model = (enum mcp251x_model)match;
| ^~~~~~~~~~~~~~~~~~~~~~~~~
Fixes: 8de29a5c34a5 ("can: mcp251x: Make use of device property API")
Link: https://lore.kernel.org/r/20210504200520.1179635-2-mkl@pengutronix.de
Reported-by: kernel test robot <lkp@intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
This patch silences the following clang warning:
| drivers/net/can/spi/hi311x.c:874:17: warning: cast to smaller integer type
| 'enum hi3110_model' from 'const void *' [-Wvoid-pointer-to-enum-cast]
| priv->model = (enum hi3110_model)of_id->data;
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Fixes: 57e83fb9b746 ("can: hi311x: Add Holt HI-311x CAN driver")
Link: https://lore.kernel.org/r/20210504200520.1179635-3-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
Since 8ce8c0abcba3 the driver queues work via priv->restart_work when
resuming after suspend, even when the interface was not previously
enabled. This causes a null dereference error as the workqueue is only
allocated and initialized in mcp251x_open().
To fix this we move the workqueue init to mcp251x_can_probe() as there
is no reason to do it later and repeat it whenever mcp251x_open() is
called.
Fixes: 8ce8c0abcba3 ("can: mcp251x: only reset hardware as required")
Link: https://lore.kernel.org/r/17d5d714-b468-482f-f37a-482e3d6df84e@kontron.de
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
[mkl: fix error handling in mcp251x_stop()]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
path
This patch adds the missing can_rx_offload_del(), that must be called
if mcp251xfd_register() fails.
Fixes: 55e5b97f003e ("can: mcp25xxfd: add driver for Microchip MCP25xxFD SPI CAN")
Link: https://lore.kernel.org/r/20210504091838.1109047-1-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
When we converted this code to use dev_err_probe() we accidentally
removed a return. It means that if devm_clk_get() it will lead to an
Oops when we call clk_get_rate() on the next line.
Fixes: cf8ee6de2543 ("can: mcp251xfd: mcp251xfd_probe(): use dev_err_probe() to simplify error handling")
Link: https://lore.kernel.org/r/YJANZf13Qxd5Mhr1@mwanda
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
Conflicts:
MAINTAINERS
- keep Chandrasekar
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
- simple fix + trust the code re-added to param.c in -next is fine
include/linux/bpf.h
- trivial
include/linux/ethtool.h
- trivial, fix kdoc while at it
include/linux/skmsg.h
- move to relevant place in tcp.c, comment re-wrapped
net/core/skmsg.c
- add the sk = sk // sk = NULL around calls
net/tipc/crypto.c
- trivial
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
register
MCP251XFD_REG_TBC is the time base counter register. It increments
once per SYS clock tick, which is 20 or 40 MHz. Observation shows that
if the lowest byte (which is transferred first on the SPI bus) of that
register is 0x00 or 0x80 the calculated CRC doesn't always match the
transferred one.
To reproduce this problem let the driver read the TBC register in a
high frequency. This can be done by attaching only the mcp251xfd CAN
controller to a valid terminated CAN bus and send a single CAN frame.
As there are no other CAN controller on the bus, the sent CAN frame is
not ACKed and the mcp251xfd repeats it. If user space enables the bus
error reporting, each of the NACK errors is reported with a time
stamp (which is read from the TBC register) to user space.
$ ip link set can0 down
$ ip link set can0 up type can bitrate 500000 berr-reporting on
$ cansend can0 4FF#ff.01.00.00.00.00.00.00
This leads to several error messages per second:
| mcp251xfd spi0.0 can0: CRC read error at address 0x0010 (length=4, data=00 3a 86 da, CRC=0x7753) retrying.
| mcp251xfd spi0.0 can0: CRC read error at address 0x0010 (length=4, data=80 01 b4 da, CRC=0x5830) retrying.
| mcp251xfd spi0.0 can0: CRC read error at address 0x0010 (length=4, data=00 e9 23 db, CRC=0xa723) retrying.
| mcp251xfd spi0.0 can0: CRC read error at address 0x0010 (length=4, data=00 8a 30 db, CRC=0x4a9c) retrying.
| mcp251xfd spi0.0 can0: CRC read error at address 0x0010 (length=4, data=80 f3 43 db, CRC=0x66d2) retrying.
If the highest bit in the lowest byte is flipped the transferred CRC
matches the calculated one. We assume for now the CRC calculation in
the chip works on wrong data and the transferred data is correct.
This patch implements the following workaround:
- If a CRC read error on the TBC register is detected and the lowest
byte is 0x00 or 0x80, the highest bit of the lowest byte is flipped
and the CRC is calculated again.
- If the CRC now matches, the _original_ data is passed to the reader.
For now we assume transferred data was OK.
Link: https://lore.kernel.org/r/20210406110617.1865592-5-mkl@pengutronix.de
Cc: Manivannan Sadhasivam <mani@kernel.org>
Cc: Thomas Kopp <thomas.kopp@microchip.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
separate function
This patch factors out the crc check into a separate function. This is
preparation for the next patch.
Link: https://lore.kernel.org/r/20210406110617.1865592-4-mkl@pengutronix.de
Cc: Manivannan Sadhasivam <mani@kernel.org>
Cc: Thomas Kopp <thomas.kopp@microchip.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
This patch re-adds BQL support to the driver. Support for
netdev_xmit_more() will be added in a separate patch series.
Link: https://lore.kernel.org/r/20210406110617.1865592-3-mkl@pengutronix.de
Cc: Manivannan Sadhasivam <mani@kernel.org>
Cc: Thomas Kopp <thomas.kopp@microchip.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
Some SPI host controllers do not support full-duplex SPI transfers.
The function mcp251x_spi_trans() does a full duplex transfer. It is
used in several places in the driver, where a TX half duplex transfer
is sufficient.
To fix support for half duplex SPI host controllers, this patch
introduces a new function mcp251x_spi_write() and changes all callers
that do a TX half duplex transfer to use mcp251x_spi_write().
Fixes: e0e25001d088 ("can: mcp251x: add support for half duplex controllers")
Link: https://lore.kernel.org/r/20210330100246.1074375-1-mkl@pengutronix.de
Cc: Tim Harvey <tharvey@gateworks.com>
Tested-By: Tim Harvey <tharvey@gateworks.com>
Reported-by: Gerhard Bertelsmann <info@gerhard-bertelsmann.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
This patch uses the previously added mcp251xfd_skb_set_timestamp()
function to convert the timestamp done by the CAN controller into a
proper skb hw timestamp.
Link: https://lore.kernel.org/r/20210304161209.2754463-1-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
This patch add the HW timestamping infrastructure. The mcp251xfd has a
free running timer of 32 bit width, running at max 40MHz, which wraps
around every 107 seconds. The current timestamp is latched into RX and
TEF objects automatically be the CAN controller.
This patch sets up a cyclecounter, timecounter and delayed worker
infrastructure (which runs every 45 seconds) to convert the timer into
a proper 64 bit based ns timestamp.
Link: https://lore.kernel.org/r/20210304160328.2752293-6-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
This is a preparation patch, it moves the mcp251xfd_get_timestamp()
function into the mcp251xfd.h file.
Link: https://lore.kernel.org/r/20210304160328.2752293-5-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
The netdevice.h header is needed in mcp251xfd.h, so that it can be
included without further headers.
Link: https://lore.kernel.org/r/20210304160328.2752293-4-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
In the patches:
| 1f652bb6bae7 can: mcp25xxfd: rx-path: reduce number of SPI core requests to set UINC bit
| 68c0c1c7f966 can: mcp251xfd: tef-path: reduce number of SPI core requests to set UINC bit
the setting of the UINC bit in the TEF and RX FIFO was batched into a
single SPI message consisting of several transfers. All transfers but
the last need to have the cs_change set to 1.
In the original patches the array of prepared transfers is send from
the beginning with the length depending on the number of read TEF/RX
objects. The cs_change of the last transfer is temporarily set to
0 during send.
This patch removes the modification of cs_change by preparing the last
transfer with cs_change to 0 and all other to 1. When sending the SPI
message the driver now starts with an offset into the array, so that
it always ends on the last entry in the array, which has the cs_change
set to 0.
Link: https://lore.kernel.org/r/20210304160328.2752293-3-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
For easier debugging this patch adds dev coredump support to the
driver. A dev coredump is generated in case the chip fails to start or
an error in the interrupt handler is detected.
The dev coredump consists of all chip registers and chip memory, as
well as the driver's internal state of the TEF-, RX- and TX-FIFOs, it
can be analyzed with the mcp251xfd-dump tool of the can-utils:
https://github.com/linux-can/can-utils/tree/master/mcp251xfd
Link: https://lore.kernel.org/r/20210304160328.2752293-2-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
In order to implement byte queue limits (bql) in CAN drivers, the
length of the CAN frame needs to be passed into the networking stack
even if the transmission failed for some reason.
To avoid to calculate this length twice, extend can_free_echo_skb() to
return that value. Convert all users of this function, too.
This patch is the natural extension of commit:
| 9420e1d495e2 ("can: dev: can_get_echo_skb(): extend to return can
| frame length")
Link: https://lore.kernel.org/r/20210319142700.305648-3-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
In the following 4 patches
| 99842c9685ab can: dev: can_rx_offload_get_echo_skb(): extend to return can frame length
| 9420e1d495e2 can: dev: can_get_echo_skb(): extend to return can frame length
| 1dcb6e57db83 can: dev: can_put_echo_skb(): extend to handle frame_len
| f0ef72febc9a can: dev: extend struct can_skb_priv to hold CAN frame length
the CAN echo SKB support was extended to hold the CAN frame
length (which is the length of the CAN frame on the wire). It is meant
as a helper for BQL support, to avoid the re-calculation of the frame
length before sending it and on TX-completion.
However if the CAN frame is send without the request to be looped back
the SKB is discarded in can_put_echo_skb() and the subsequent
can_get_echo_skb() and can_rx_offload_get_echo_skb() return 0 for the
CAN frame length. This results in BQL stalling the TX queue after a
few packages.
Until the BQL helpers can_get_echo_skb() and
can_rx_offload_get_echo_skb() are fixed, revert the BQL support for
the mcp251xfd driver.
This reverts commit 4162e18e949ba520d5116ac0323500355479a00e.
Fixes: 4162e18e949b ("can: mcp251xfd: add BQL support")
Cc: Manivannan Sadhasivam <mani@kernel.org>
Cc: Thomas Kopp <thomas.kopp@microchip.com>
Link: https://lore.kernel.org/r/20210228083347.28580-1-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
handling
dev_err_probe() can reduce code size, uniform error handling and record the
defer probe reason etc., use it to simplify the code.
Link: https://lore.kernel.org/r/20210128104644.2982125-9-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
This patch simplifies the return of the mcp251xfd_chip_clock_enable()
function by direct returning the error.
Link: https://lore.kernel.org/r/20210128104644.2982125-8-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
As MCP251XFD_OBJ_FLAGS_DLC is a mask, add the missing _MASK postfix,
that all other masks in the driver have.
Link: https://lore.kernel.org/r/20210128104644.2982125-7-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
This patch unifies the error messages:
- have a "." and the end of each message
- write controller with a small "c", if not the first word of an error
message.
Link: https://lore.kernel.org/r/20210128104644.2982125-6-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
This patch adds an imx6 as known good to the errata table.
Link: https://lore.kernel.org/r/20210128104644.2982125-5-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
tabe
The published errata specify the maximum allowed SPI frequency to be
max 85% of (FSYSCLK/2). So there's no need to track known bad clock
settings in the driver. As the setup of known good values is a bit
tricky, keep them.
Link: https://lore.kernel.org/r/20210128104644.2982125-4-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
indention
This patch sorts the errata table alphabetically and fixes the
indention.
Link: https://lore.kernel.org/r/20210128104644.2982125-3-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
This patch fixes the reference to the errata for both the mcp2517fd
and the mcp2518fd.
Fixes: f5b84dedf7eb ("can: mcp25xxfd: mcp25xxfd_probe(): add SPI clk limit related errata information")
Link: https://lore.kernel.org/r/20210128104644.2982125-2-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
This patch adds BQL support to the driver. Support for netdev_xmit_more() will
be added in a separate patch series.
Link: https://lore.kernel.org/r/20210114153448.1506901-7-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
This patch adds support for the Classical CAN raw DLC functionality to send and
receive DLC values from 9 ... 15 to the mcp251xfd driver.
Link: https://lore.kernel.org/r/20210114153448.1506901-6-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
frames in TX-path
In Classical CAN there are RTR frames. RTR frames have the RTR bit set, may
have a dlc != 0, but contain no data.
This patch optimizes the TX-path to not copy any data for RTR frames.
Link: https://lore.kernel.org/r/20210114153448.1506901-5-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
frames in RX-path
In Classical CAN there are RTR frames. RTR frames have the RTR bit set, may
have a dlc != 0, but contain no data.
This patch changes the RX-path to no copy any data for RTR frames, so that the
data field in the CAN frame stays 0x0.
Link: https://lore.kernel.org/r/20210114153448.1506901-4-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
CAN-FD frames have only specific frame length (0, 1, 2, 3, 4, 5, 6, 7, 8, 12,
16, 20, 24, 32, 48, 64). A CAN-FD frame provided by user space might not cover
the whole CAN-FD frame. To avoid sending garbage over the CAN bus the driver
pads the CAN frame with 0x0 (if MCP251XFD_SANITIZE_CAN is activated).
This patch cleans up the pad len calculation. Rounding to full u32 brings no
benefit, in case of CRC transfers, the hw_tx_obj->data is not aligned to u32
anyway.
Link: https://lore.kernel.org/r/20210114153448.1506901-3-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
TX is is full
This patch replaces an open coded check if the TX ring is full by a check if
mcp251xfd_get_tx_free() returns 0.
Link: https://lore.kernel.org/r/20210114153448.1506901-2-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
The sizeof(u32) is hardcoded. It's better to use the config value from the
regmap.
It increases the size of target object, but it's flexible when new mcp chip
need other val_bytes.
Link: https://lore.kernel.org/r/20210122081334.213957-1-suyanjun218@gmail.com
Signed-off-by: Su Yanjun <suyanjun218@gmail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
In order to implement byte queue limits (bql) in CAN drivers, the length of the
CAN frame needs to be passed into the networking stack after queueing and after
transmission completion.
To avoid to calculate this length twice, extend can_rx_offload_get_echo_skb()
to return that value. Convert all users of this function, too.
Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/r/20210111141930.693847-15-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
In order to implement byte queue limits (bql) in CAN drivers, the length of the
CAN frame needs to be passed into the networking stack after queueing and after
transmission completion.
To avoid to calculate this length twice, extend can_get_echo_skb() to return
that value. Convert all users of this function, too.
Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/r/20210111141930.693847-14-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
|
Add a frame_len argument to can_put_echo_skb() which is used to save length of
the CAN frame into field frame_len of struct can_skb_priv so that it can be
later used after transmission completion. Convert all users of this function,
too.
Drivers which implement BQL call can_put_echo_skb() with the output of
can_skb_get_frame_len(skb) and drivers which do not simply pass zero as an
input (in the same way that NULL would be given to can_get_echo_skb()). This
way, we have a nice symmetry between the two echo functions.
Link: https://lore.kernel.org/r/20210111061335.39983-1-mailhol.vincent@wanadoo.fr
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/r/20210111141930.693847-13-mkl@pengutronix.de
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
|
|
If alloc_canfd_skb() returns NULL, 'cfg' is an uninitialized variable, so we
should check 'skb' rather than 'cfd' after calling alloc_canfd_skb(priv->ndev,
&cfd).
Fixes: 55e5b97f003e ("can: mcp25xxfd: add driver for Microchip MCP25xxFD SPI CAN")
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210113073100.79552-1-miaoqinglang@huawei.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
