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sst-linux/Documentation/driver-api
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Marco Pagani 304f8032d6 fpga: manager: add owner module and take its refcount 
[ Upstream commit 4d4d2d4346857bf778fafaa97d6f76bb1663e3c9 ]

The current implementation of the fpga manager assumes that the low-level
module registers a driver for the parent device and uses its owner pointer
to take the module's refcount. This approach is problematic since it can
lead to a null pointer dereference while attempting to get the manager if
the parent device does not have a driver.

To address this problem, add a module owner pointer to the fpga_manager
struct and use it to take the module's refcount. Modify the functions for
registering the manager to take an additional owner module parameter and
rename them to avoid conflicts. Use the old function names for helper
macros that automatically set the module that registers the manager as the
owner. This ensures compatibility with existing low-level control modules
and reduces the chances of registering a manager without setting the owner.

Also, update the documentation to keep it consistent with the new interface
for registering an fpga manager.

Other changes: opportunistically move put_device() from __fpga_mgr_get() to
fpga_mgr_get() and of_fpga_mgr_get() to improve code clarity since the
manager device is taken in these functions.

Fixes: 654ba4cc0f ("fpga manager: ensure lifetime with of_fpga_mgr_get")
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Suggested-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Marco Pagani <marpagan@redhat.com>
Acked-by: Xu Yilun <yilun.xu@intel.com>
Link: https://lore.kernel.org/r/20240305192926.84886-1-marpagan@redhat.com
Signed-off-by: Xu Yilun <yilun.xu@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-12-14 19:53:12 +01:00
..
80211
acpi
backlight
cxl Documentation: cxl: remove dangling kernel-doc reference 2022-08-05 08:41:02 -07:00
dmaengine dmaengine: remove DMA_MEMCPY_SG once again 2022-06-27 12:01:40 +05:30
driver-model Documentation: devres: add missing I2C helper 2022-11-02 21:16:38 +01:00
early-userspace
firmware Driver core / kernfs changes for 6.0-rc1 2022-08-04 11:31:20 -07:00
fpga fpga: manager: add owner module and take its refcount 2024-12-14 19:53:12 +01:00
gpio This was a moderately busy cycle for documentation, but nothing all that 2022-08-02 19:24:24 -07:00
hte tegra194-hte.rst: fix reference to its binding 2022-07-07 13:10:00 -06:00
i3c
iio docs: iio: mark "repeat" sysfs attribute as optional 2021-03-11 20:47:08 +00:00
md
media media: mc: entity: Rewrite media_pipeline_start() 2022-09-24 09:19:42 +02:00
mei
memory-devices
mmc
mtd Documentation / MTD: Rename the intel-spi driver 2022-02-14 12:53:10 +00:00
nfc
nvdimm nvdimm/blk: Fix title level 2022-03-23 17:52:33 -07:00
pci
phy
pldmfw
pm docs: devices.rst: better reference documentation docs 2021-06-17 13:24:36 -06:00
rapidio
serial tty: serial: document uart_get_console() 2022-07-28 10:37:42 +02:00
soundwire docs: soundwire: fix some identation at stream.rst 2020-09-10 10:49:29 -06:00
surface_aggregator platform/surface: aggregator: Allow notifiers to avoid communication on unregistering 2022-06-13 17:25:07 +02:00
thermal docs: driver-api/thermal/intel_dptf: Use copyright symbol 2022-04-05 09:46:06 -06:00
tty Documentation: tty: n_gsm, use power of ReST 2022-04-14 18:24:24 +02:00
usb Docs: usb: update writesize, copy_from_user, usb_fill_bulk_urb, usb_submit_urb 2021-11-17 14:54:58 +01:00
xilinx
aperture.rst drm: Implement DRM aperture helpers under video/ 2022-06-27 11:07:55 +02:00
auxiliary_bus.rst Documentation/auxiliary_bus: Move the text into the code 2021-12-03 16:41:50 +01:00
basics.rst overflow: Fix kern-doc markup for functions 2022-10-25 14:57:42 -07:00
clk.rst docs: clk: fix struct syntax 2019-06-07 11:35:15 -06:00
component.rst drm/doc: document recommended component helper usage 2019-02-19 12:22:24 +01:00
connector.rst net/connector: Add const qualifier to cb_id 2020-12-16 11:06:49 -08:00
console.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
dcdbas.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
devfreq.rst docs: Add initial documentation for devfreq 2019-11-19 13:16:53 -07:00
device_link.rst docs: device_link.rst: remove duplicated kernel-doc include 2020-10-15 07:49:42 +02:00
device-io.rst dma-buf-map: Rename to iosys-map 2022-02-07 16:35:35 -08:00
dma-buf.rst dma-buf: add dma_fence_unwrap v2 2022-03-25 14:18:28 +01:00
edac.rst edac.rst: move concepts dictionary from edac.h 2016-12-15 08:58:12 -02:00
eisa.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
firewire.rst Documentation: fix firewire.rst ABI file path error 2022-01-20 17:01:32 -07:00
frame-buffer.rst docs: split up the driver book 2016-08-22 14:42:08 -06:00
generic-counter.rst counter: Update documentation for new counter registration functions 2021-12-30 17:44:06 +01:00
hsi.rst docs: split up serial-interfaces.rst 2016-09-06 09:14:52 -06:00
i2c.rst Merge branch 'i2c/for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2017-07-12 10:04:56 -07:00
index.rst drm: Implement DRM aperture helpers under video/ 2022-06-27 11:07:55 +02:00
infiniband.rst RDMA/core: Remove FMR pool API 2020-06-02 20:32:53 -03:00
infrastructure.rst docs: infrastructure.rst: exclude device_link_state from device.h 2020-10-15 07:49:46 +02:00
input.rst Input: remove input_polled_dev implementation 2020-12-02 12:35:14 -08:00
interconnect.rst interconnect: Add interconnect_graph file to debugfs 2019-12-16 09:49:54 +02:00
io_ordering.rst Documentation: Add io_ordering.rst to driver-api manual 2020-03-10 11:33:19 -06:00
io-mapping.rst io-mapping: Provide iomap_local variant 2020-11-24 14:42:09 +01:00
ioctl.rst docs: driver-api: avoid using ReST :doc:foo markup 2021-06-17 13:24:37 -06:00
ipmb.rst drivers: ipmi: Support raw i2c packet in IPMB 2019-12-11 13:21:36 -06:00
ipmi.rst ipmi: docs: don't advertise deprecated sysfs entries 2024-10-17 15:20:54 +02:00
isa.rst Remove duplicate words inside documentation 2022-09-27 13:21:43 -06:00
isapnp.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
libata.rst libata: Improve ATA queued command allocation 2022-04-11 09:27:44 +09:00
mailbox.rst docs: move mailbox.txt to driver-api and rename it 2020-06-26 11:33:38 -06:00
men-chameleon-bus.rst Documentation: document dma device use for mcb 2021-01-11 13:26:13 -07:00
message-based.rst docs: Don't format internal MPT docs 2016-09-06 09:15:48 -06:00
misc_devices.rst docs-rst: core_api: move driver-specific stuff to drivers_api 2017-04-02 14:17:43 -06:00
miscellaneous.rst docs/driver-api/miscellaneous: Remove kernel-doc of serial_core.c 2022-11-09 14:56:05 +01:00
mtdnand.rst docs: mtd: Avoid htmldocs warnings 2020-12-10 22:37:32 +01:00
ntb.rst Documentation/driver-api: ntb: drop doubled word 2020-07-13 11:18:17 -06:00
nvmem.rst doc: nvmem: Update example 2022-02-21 18:00:30 +01:00
parport-lowlevel.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
pin-control.rst docs/pinctrl: fix the reference to the u300 platform 2021-05-28 02:59:40 +02:00
pps.rst docs: driver-api: add remaining converted dirs to it 2019-07-15 11:03:03 -03:00
ptp.rst docs: ptp.rst: add support for Renesas (IDT) ClockMatrix 2020-07-17 10:25:21 -07:00
pwm.rst pwm: core: Get rid of unused devm_of_pwm_get() 2022-09-19 06:17:05 -07:00
regulator.rst docs: get rid of :c:type explicit declarations for structs 2020-10-15 07:49:40 +02:00
reset.rst docs: add a reset controller chapter to the driver API docs 2020-12-08 10:48:04 -07:00
rfkill.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
s390-drivers.rst docs: s390: convert docs to ReST and rename to *.rst 2019-06-11 09:48:14 +02:00
scsi.rst scsi: target: add driver-api document 2018-04-20 19:14:40 -04:00
slimbus.rst slimbus: stream: add stream support 2018-07-07 17:25:23 +02:00
sm501.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
spi.rst spi: Update reference to struct spi_controller 2022-12-31 13:32:06 +01:00
switchtec.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
sync_file.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
target.rst docs: scsi: target.rst: remove iSCSI transport class kernel-doc markup 2020-10-15 07:49:42 +02:00
uio-howto.rst Documentation/driver-api: uio-howto: drop doubled word 2020-07-10 14:58:01 +02:00
vfio-mediated-device.rst vfio/mdev: consolidate all the description sysfs into the core code 2022-10-04 12:06:58 -06:00
vfio-pci-device-specific-driver-acceptance.rst vfio-pci: Provide reviewers and acceptance criteria for variant drivers 2022-03-17 09:57:11 -06:00
vfio.rst vfio: Introduce a vfio_uninit_group_dev() API call 2021-08-11 09:50:10 -06:00
vme.rst vme: move back to staging 2022-06-10 15:38:14 +02:00
w1.rst docs: driver-api: address duplicate label warning 2020-04-07 13:41:34 -06:00
xillybus.rst Documentation/driver-api: xillybus: drop doubled word 2020-07-10 14:58:01 +02:00
zorro.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00