linux-toradex.git/drivers/net/caif, branch v6.19

Merge tag 'tty-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2025-04-03T01:17:33+00:00

Pull tty/serial driver updates from Greg KH:
 "Here is the big set of serial and tty driver updates for 6.15-rc1.
  Include in here are the following:

   - more great tty layer cleanups from Jiri. Someday this will be done,
     but that's not going to be any year soon...

   - kdb debug driver reverts to fix a reported issue

   - lots of .dts binding updates for different devices with serial
     devices

   - lots of tiny updates and tweaks and a few bugfixes for different
     serial drivers.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (79 commits)
  tty: serial: fsl_lpuart: Fix unused variable 'sport' build warning
  serial: stm32: do not deassert RS485 RTS GPIO prematurely
  serial: 8250: add driver for NI UARTs
  dt-bindings: serial: snps-dw-apb-uart: document RZ/N1 binding without DMA
  serial: icom: fix code format problems
  serial: sh-sci: Save and restore more registers
  tty: serial: pl011: remove incorrect of_match_ptr annotation
  dt-bindings: serial: snps-dw-apb-uart: Add support for rk3562
  tty: serial: lpuart: only disable CTS instead of overwriting the whole UARTMODIR register
  tty: caif: removed unused function debugfs_tx()
  serial: 8250_dma: terminate correct DMA in tx_dma_flush()
  tty: serial: fsl_lpuart: rename register variables more specifically
  tty: serial: fsl_lpuart: use port struct directly to simply code
  tty: serial: fsl_lpuart: Use u32 and u8 for register variables
  tty: serial: fsl_lpuart: disable transmitter before changing RS485 related registers
  tty: serial: 8250: Add Brainboxes XC devices
  dt-bindings: serial: fsl-lpuart: support i.MX94
  tty: serial: 8250: Add some more device IDs
  dt-bindings: serial: samsung: add exynos7870-uart compatible
  serial: 8250_dw: Comment possible corner cases in serial_out() implementation
  ...

tty: caif: removed unused function debugfs_tx()

2025-03-24T20:56:16+00:00

Remove debugfs_tx() which was added when the caif driver was added in
commit 9b27105b4a44 ("net-caif-driver: add CAIF serial driver (ldisc)")
but it has never been used.

Flagged by LLVM 19.1.7 W=1 builds.

Signed-off-by: Simon Horman 
Link: https://patch.msgid.link/20250320-caif-debugfs-tx-v1-1-be5654770088@kernel.org
Signed-off-by: Jakub Kicinski

tty: caif: removed unused function debugfs_tx()

2025-03-20T15:08:50+00:00

Remove debugfs_tx() which was added when the caif driver was added in
commit 9b27105b4a44 ("net-caif-driver: add CAIF serial driver (ldisc)")
but it has never been used.

Flagged by LLVM 19.1.7 W=1 builds.

Signed-off-by: Simon Horman 
Link: https://lore.kernel.org/r/20250320-caif-debugfs-tx-v1-1-be5654770088@kernel.org
Signed-off-by: Greg Kroah-Hartman

tty: caif: do not use N_TTY_BUF_SIZE

2025-03-20T15:00:50+00:00

N_TTY_BUF_SIZE -- as the name suggests -- is the N_TTY's buffer size.
There is no reason to couple that to caif's tty->receive_room. Use 4096
directly -- even though, it should be some sort of "SKB_MAX_ALLOC" or
alike. But definitely not N_TTY_BUF_SIZE.

N_TTY_BUF_SIZE is private and will be moved to n_tty.c later.

Signed-off-by: Jiri Slaby (SUSE) 
Acked-by: Jakub Kicinski 
Cc: Andrew Lunn 
Cc: David S. Miller 
Cc: Eric Dumazet 
Cc: Paolo Abeni 
Cc: netdev@vger.kernel.org
Link: https://lore.kernel.org/r/20250317070046.24386-4-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman

caif_virtio: fix wrong pointer check in cfv_probe()

2025-03-01T02:04:23+00:00

del_vqs() frees virtqueues, therefore cfv->vq_tx pointer should be checked
for NULL before calling it, not cfv->vdev. Also the current implementation
is redundant because the pointer cfv->vdev is dereferenced before it is
checked for NULL.

Fix this by checking cfv->vq_tx for NULL instead of cfv->vdev before
calling del_vqs().

Fixes: 0d2e1a2926b1 ("caif_virtio: Introduce caif over virtio")
Signed-off-by: Vitaliy Shevtsov 
Reviewed-by: Gerhard Engleder 
Link: https://patch.msgid.link/20250227184716.4715-1-v.shevtsov@mt-integration.ru
Signed-off-by: Jakub Kicinski

caif_virtio: use virtio_find_single_vq() for single virtqueue finding

2024-07-17T09:20:56+00:00

Since caif uses only one queue, convert to virtio_find_single_vq()
helper which is made for this purpose.

Signed-off-by: Jiri Pirko 
Message-Id: <20240708074814.1739223-2-jiri@resnulli.us>
Signed-off-by: Michael S. Tsirkin

net: caif: virtio: drop owner assignment

2024-05-22T12:31:17+00:00

virtio core already sets the .owner, so driver does not need to.

Signed-off-by: Krzysztof Kozlowski 

Message-Id: <20240331-module-owner-virtio-v2-16-98f04bfaf46a@linaro.org>
Signed-off-by: Michael S. Tsirkin

tty: use u8 for flags

2023-08-11T19:12:45+00:00

This makes all those 'char's an explicit 'u8'. This is part of the
continuing unification of chars and flags to be consistent u8.

This approaches tty_port_default_receive_buf().

Note that we do not change signedness as we compile with
-funsigned-char.

Signed-off-by: "Jiri Slaby (SUSE)" 
Cc: William Hubbs 
Cc: Chris Brannon 
Cc: Kirk Reiser 
Cc: Samuel Thibault 
Cc: Marcel Holtmann 
Cc: Johan Hedberg 
Cc: Luiz Augusto von Dentz 
Cc: Dmitry Torokhov 
Cc: Arnd Bergmann 
Cc: "David S. Miller" 
Cc: Eric Dumazet 
Cc: Jakub Kicinski 
Cc: Paolo Abeni 
Cc: Max Staudt 
Cc: Wolfgang Grandegger 
Cc: Marc Kleine-Budde 
Cc: Dario Binacchi 
Cc: Andreas Koensgen 
Cc: Jeremy Kerr 
Cc: Matt Johnston 
Cc: Krzysztof Kozlowski 
Cc: Liam Girdwood 
Cc: Mark Brown 
Cc: Jaroslav Kysela 
Cc: Takashi Iwai 
Acked-by: Mark Brown 
Link: https://lore.kernel.org/r/20230810091510.13006-18-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman

tty: make tty_ldisc_ops::buf() hooks operate on size_t

2023-08-11T19:12:45+00:00

Count passed to tty_ldisc_ops::receive_buf*(), ::lookahead_buf(), and
returned from ::receive_buf2() is expected to be size_t. So set it to
size_t to unify with the rest of the code.

Signed-off-by: "Jiri Slaby (SUSE)" 
Cc: William Hubbs 
Cc: Chris Brannon 
Cc: Kirk Reiser 
Cc: Samuel Thibault 
Cc: Marcel Holtmann 
Cc: Johan Hedberg 
Cc: Luiz Augusto von Dentz 
Cc: Dmitry Torokhov 
Cc: Arnd Bergmann 
Cc: "David S. Miller" 
Cc: Eric Dumazet 
Cc: Jakub Kicinski 
Cc: Paolo Abeni 
Cc: Max Staudt 
Cc: Wolfgang Grandegger 
Cc: Marc Kleine-Budde 
Cc: Dario Binacchi 
Cc: Andreas Koensgen 
Cc: Jeremy Kerr 
Cc: Matt Johnston 
Cc: Krzysztof Kozlowski 
Cc: Liam Girdwood 
Cc: Mark Brown 
Cc: Jaroslav Kysela 
Cc: Takashi Iwai 
Acked-by: Mark Brown 
Link: https://lore.kernel.org/r/20230810091510.13006-16-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman

caif_virtio: fix race between virtio_device_ready() and ndo_open()

2022-06-27T12:04:30+00:00

We currently depend on probe() calling virtio_device_ready() -
which happens after netdev
registration. Since ndo_open() can be called immediately
after register_netdev, this means there exists a race between
ndo_open() and virtio_device_ready(): the driver may start to use the
device (e.g. TX) before DRIVER_OK which violates the spec.

Fix this by switching to use register_netdevice() and protect the
virtio_device_ready() with rtnl_lock() to make sure ndo_open() can
only be called after virtio_device_ready().

Fixes: 0d2e1a2926b18 ("caif_virtio: Introduce caif over virtio")
Signed-off-by: Jason Wang 
Message-Id: <20220620051115.3142-3-jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin

linux-toradex.git/drivers/net/caif, branch v6.19

Merge tag 'tty-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

tty: caif: removed unused function debugfs_tx()

tty: caif: removed unused function debugfs_tx()

tty: caif: do not use N_TTY_BUF_SIZE

caif_virtio: fix wrong pointer check in cfv_probe()

caif_virtio: use virtio_find_single_vq() for single virtqueue finding

net: caif: virtio: drop owner assignment

tty: use u8 for flags

tty: make tty_ldisc_ops::*buf*() hooks operate on size_t

caif_virtio: fix race between virtio_device_ready() and ndo_open()

tty: make tty_ldisc_ops::buf() hooks operate on size_t