linux.git/arch/parisc/kernel/drivers.c, branch v6.12.80

parisc: kernel: replace kfree() with put_device() in create_tree_node()

2026-03-04T12:21:54+00:00

[ Upstream commit dcf69599c47f29ce0a99117eb3f9ddcd2c4e78b6 ]

If device_register() fails, put_device() is the correct way to
drop the device reference.

Found by code review.

Fixes: 1070c9655b90 ("[PA-RISC] Fix must_check warnings in drivers.c")
Cc: stable@vger.kernel.org
Signed-off-by: Haoxiang Li 
Signed-off-by: Helge Deller 
Signed-off-by: Sasha Levin

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

2024-07-03T13:16:54+00:00

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

parisc: make parisc_bus_type const

2024-02-27T21:51:44+00:00

Since commit d492cc2573a0 ("driver core: device.h: make struct
bus_type a const *"), the driver core can properly handle constant
struct bus_type, move the parisc_bus_type variable to be a constant
structure as well, placing it into read-only memory which can not be
modified at runtime.

Cc: Greg Kroah-Hartman 
Suggested-by: Greg Kroah-Hartman 
Signed-off-by: Ricardo B. Marliere 
Reviewed-by: Greg Kroah-Hartman 
Signed-off-by: Helge Deller

parisc: Drop unneeded semicolon in parse_tree_node()

2024-01-28T08:49:47+00:00

Reported-by: kernel test robot 
Signed-off-by: Helge Deller 
Closes: https://lore.kernel.org/oe-kbuild-all/202401222059.Wli6OGT0-lkp@intel.com/

parisc: Prevent hung tasks when printing inventory on serial console

2024-01-28T08:49:47+00:00

Printing the inventory on a serial console can be quite slow and thus may
trigger the hung task detector (CONFIG_DETECT_HUNG_TASK=y) and possibly
reboot the machine. Adding a cond_resched() prevents this.

Signed-off-by: Helge Deller 
Cc:  # v6.0+

parisc: Show default CPU PSW.W setting as reported by PDC

2023-10-30T13:54:41+00:00

The last word shows the default PSW.W setting.

Signed-off-by: Helge Deller

parisc: drivers: Fix sparse warning

2023-08-31T20:09:15+00:00

Fix "warning: directive in macro's argument list" warning.

Signed-off-by: Helge Deller

parisc: drivers: Fix kdoc warnings

2023-06-30T15:14:14+00:00

Signed-off-by: Helge Deller

driver core: make struct bus_type.uevent() take a const *

2023-01-27T12:45:52+00:00

The uevent() callback in struct bus_type should not be modifying the
device that is passed into it, so mark it as a const * and propagate the
function signature changes out into all relevant subsystems that use
this callback.

Acked-by: Rafael J. Wysocki 
Acked-by: Hans de Goede 
Link: https://lore.kernel.org/r/20230111113018.459199-16-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman

parisc: Avoid printing the hardware path twice

2022-10-31T14:37:14+00:00

Avoid that the hardware path is shown twice in the kernel log, and clean
up the output of the version numbers to show up in the same order as
they are listed in the hardware database in the hardware.c file.
Additionally, optimize the memory footprint of the hardware database
and mark some code as init code.

Fixes: cab56b51ec0e ("parisc: Fix device names in /proc/iomem")
Signed-off-by: Helge Deller 
Cc:  # v4.9+