kernel/drivers/tty/serial/serial_base_bus.c, branch linux-rolling-stable

serial: core: Fix serial device initialization

2026-01-02T11:57:15Z

commit f54151148b969fb4b62bec8093d255306d20df30 upstream. During restoring sysfs fwnode information the information of_node_reused was dropped. This was previously set by device_set_of_node_from_dev(). Add it back manually Fixes: 24ec03cc5512 ("serial: core: Restore sysfs fwnode information") Cc: stable Suggested-by: Cosmin Tanislav Signed-off-by: Alexander Stein Tested-by: Michael Walle Tested-by: Marek Szyprowski Tested-by: Cosmin Tanislav Link: https://patch.msgid.link/20251219152813.1893982-1-alexander.stein@ew.tq-group.com Signed-off-by: Greg Kroah-Hartman

serial: core: Restore sysfs fwnode information

2026-01-02T11:57:15Z

commit 24ec03cc55126b7b3adf102f4b3d9f716532b329 upstream. The change that restores sysfs fwnode information does it only for OF cases. Update the fix to cover all possible types of fwnodes. Fixes: d36f0e9a0002 ("serial: core: restore of_node information in sysfs") Cc: stable Signed-off-by: Andy Shevchenko Link: https://patch.msgid.link/20251127163650.2942075-1-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman

serial: core: fix OF node leak

2025-07-09T11:41:48Z

Make sure to drop the OF node reference taken when initialising the control and port devices when the devices are later released. Fixes: d36f0e9a0002 ("serial: core: restore of_node information in sysfs") Cc: Aidan Stewart Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20250708085817.16070-1-johan@kernel.org Signed-off-by: Greg Kroah-Hartman

serial: core: restore of_node information in sysfs

2025-06-19T11:27:48Z

Since in v6.8-rc1, the of_node symlink under tty devices is missing. This breaks any udev rules relying on this information. Link the of_node information in the serial controller device with the parent defined in the device tree. This will also apply to the serial device which takes the serial controller as a parent device. Fixes: b286f4e87e32 ("serial: core: Move tty and serdev to be children of serial core port device") Cc: stable@vger.kernel.org Signed-off-by: Aidan Stewart Link: https://lore.kernel.org/r/20250617164819.13912-1-astewart@tektelic.com Signed-off-by: Greg Kroah-Hartman

Merge tag 'driver-core-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2024-07-25T17:42:22Z

Pull driver core updates from Greg KH: "Here is the big set of driver core changes for 6.11-rc1. Lots of stuff in here, with not a huge diffstat, but apis are evolving which required lots of files to be touched. Highlights of the changes in here are: - platform remove callback api final fixups (Uwe took many releases to get here, finally!) - Rust bindings for basic firmware apis and initial driver-core interactions. It's not all that useful for a "write a whole driver in rust" type of thing, but the firmware bindings do help out the phy rust drivers, and the driver core bindings give a solid base on which others can start their work. There is still a long way to go here before we have a multitude of rust drivers being added, but it's a great first step. - driver core const api changes. This reached across all bus types, and there are some fix-ups for some not-common bus types that linux-next and 0-day testing shook out. This work is being done to help make the rust bindings more safe, as well as the C code, moving toward the end-goal of allowing us to put driver structures into read-only memory. We aren't there yet, but are getting closer. - minor devres cleanups and fixes found by code inspection - arch_topology minor changes - other minor driver core cleanups All of these have been in linux-next for a very long time with no reported problems" * tag 'driver-core-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (55 commits) ARM: sa1100: make match function take a const pointer sysfs/cpu: Make crash_hotplug attribute world-readable dio: Have dio_bus_match() callback take a const * zorro: make match function take a const pointer driver core: module: make module_[add|remove]_driver take a const * driver core: make driver_find_device() take a const * driver core: make driver_[create|remove]_file take a const * firmware_loader: fix soundness issue in `request_internal` firmware_loader: annotate doctests as `no_run` devres: Correct code style for functions that return a pointer type devres: Initialize an uninitialized struct member devres: Fix memory leakage caused by driver API devm_free_percpu() devres: Fix devm_krealloc() wasting memory driver core: platform: Switch to use kmemdup_array() driver core: have match() callback in struct bus_type take a const * MAINTAINERS: add Rust device abstractions to DRIVER CORE device: rust: improve safety comments MAINTAINERS: add Danilo as FIRMWARE LOADER maintainer MAINTAINERS: add Rust FW abstractions to FIRMWARE LOADER firmware: rust: improve safety comments ...

serial: core: Add serial_base_match_and_update_preferred_console()

2024-07-04T13:41:44Z

Let's add serial_base_match_and_update_preferred_console() for consoles using DEVNAME:0.0 style naming. The earlier approach to add it caused issues in the kernel command line ordering as we were calling __add_preferred_console() again for the deferred consoles. Signed-off-by: Tony Lindgren Reviewed-by: Petr Mladek Tested-by: Petr Mladek Link: https://lore.kernel.org/r/20240703100615.118762-3-tony.lindgren@linux.intel.com Signed-off-by: Greg Kroah-Hartman

driver core: have match() callback in struct bus_type take a const *

2024-07-03T13:16:54Z

In the match() callback, the struct device_driver * should not be changed, so change the function callback to be a const *. This is one step of many towards making the driver core safe to have struct device_driver in read-only memory. Because the match() callback is in all busses, all busses are modified to handle this properly. This does entail switching some container_of() calls to container_of_const() to properly handle the constant *. For some busses, like PCI and USB and HV, the const * is cast away in the match callback as those busses do want to modify those structures at this point in time (they have a local lock in the driver structure.) That will have to be changed in the future if they wish to have their struct device * in read-only-memory. Cc: Rafael J. Wysocki Reviewed-by: Alex Elder Acked-by: Sumit Garg Link: https://lore.kernel.org/r/2024070136-wrongdoer-busily-01e8@gregkh Signed-off-by: Greg Kroah-Hartman

Revert "serial: core: Add support for DEVNAME:0.0 style naming for kernel console"

2024-06-25T05:58:00Z

This reverts commit 787a1cabac01c99846070fcf702e53befaf89f79. Let's roll back all of the serial core and printk console changes that went into 6.10-rc1 as there still are problems with them that need to be sorted out. Link: https://lore.kernel.org/r/ZnpRozsdw6zbjqze@tlindgre-MOBL1 Reported-by: Petr Mladek Reported-by: Tony Lindgren Cc: Jiri Slaby Cc: John Ogness Cc: Sergey Senozhatsky Cc: Andy Shevchenko Cc: Ilpo Järvinen Signed-off-by: Greg Kroah-Hartman

Revert "serial: core: Handle serial console options"

2024-06-25T05:57:58Z

This reverts commit a0f32e2dd99867b164bfebcf36729c2a0d41b30b. Let's roll back all of the serial core and printk console changes that went into 6.10-rc1 as there still are problems with them that need to be sorted out. Link: https://lore.kernel.org/r/ZnpRozsdw6zbjqze@tlindgre-MOBL1 Reported-by: Petr Mladek Reported-by: Tony Lindgren Cc: Jiri Slaby Cc: John Ogness Cc: Sergey Senozhatsky Cc: Andy Shevchenko Cc: Ilpo Järvinen Signed-off-by: Greg Kroah-Hartman

Revert "serial: 8250: Add preferred console in serial8250_isa_init_ports()"

2024-06-25T05:57:55Z

This reverts commit a8b04cfe7dad84e65df5996e14b435fd356fe62c. Let's roll back all of the serial core and printk console changes that went into 6.10-rc1 as there still are problems with them that need to be sorted out. Link: https://lore.kernel.org/r/ZnpRozsdw6zbjqze@tlindgre-MOBL1 Reported-by: Petr Mladek Reported-by: Tony Lindgren Cc: Jiri Slaby Cc: John Ogness Cc: Sergey Senozhatsky Cc: Andy Shevchenko Cc: Ilpo Järvinen Signed-off-by: Greg Kroah-Hartman