linux-stable.git/drivers/uio, branch v6.10

Merge 6.9-rc5 into char-misc-next

2024-04-23T11:16:03+00:00

We need the char/misc fixes in here as well to work off of.

Signed-off-by: Greg Kroah-Hartman

uio: update kerneldoc comments for interrupt functions

2024-04-15T07:22:03+00:00

Update the kerneldoc comment for uio_interrupt_handler and add one for
uio_interrupt_thread.

Reported-by: kernel test robot 
Reported-by: Stephen Rothwell 
Closes: https://lore.kernel.org/oe-kbuild-all/202404112227.mIATKoTb-lkp@intel.com/
Fixes: f8a27dfa4b82 ("uio: use threaded interrupts")
Signed-off-by: Chris Packham 
Link: https://lore.kernel.org/r/20240414215220.2424597-1-chris.packham@alliedtelesis.co.nz
Signed-off-by: Greg Kroah-Hartman

Merge tag 'hyperv-fixes-signed-20240411' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

2024-04-11T23:23:56+00:00

Pull hyperv fixes from Wei Liu:

 - Some cosmetic changes (Erni Sri Satya Vennela, Li Zhijian)

 - Introduce hv_numa_node_to_pxm_info() (Nuno Das Neves)

 - Fix KVP daemon to handle IPv4 and IPv6 combination for keyfile format
   (Shradha Gupta)

 - Avoid freeing decrypted memory in a confidential VM (Rick Edgecombe
   and Michael Kelley)

* tag 'hyperv-fixes-signed-20240411' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  Drivers: hv: vmbus: Don't free ring buffers that couldn't be re-encrypted
  uio_hv_generic: Don't free decrypted memory
  hv_netvsc: Don't free decrypted memory
  Drivers: hv: vmbus: Track decrypted status in vmbus_gpadl
  Drivers: hv: vmbus: Leak pages if set_memory_encrypted() fails
  hv/hv_kvp_daemon: Handle IPv4 and Ipv6 combination for keyfile format
  hv: vmbus: Convert sprintf() family to sysfs_emit() family
  mshyperv: Introduce hv_numa_node_to_pxm_info()
  x86/hyperv: Cosmetic changes for hv_apic.c

uio_hv_generic: Remove use of PAGE_SIZE

2024-04-11T12:55:53+00:00

Remove use of PAGE_SIZE for device ring buffer size calculation, as
there is no dependency on device ring buffer size for linux kernel's
PAGE_SIZE. Use the absolute value of 2 MB instead.

Signed-off-by: Saurabh Sengar 
Reviewed-by: Long Li 
Link: https://lore.kernel.org/r/1711788723-8593-8-git-send-email-ssengar@linux.microsoft.com
Signed-off-by: Greg Kroah-Hartman

uio_hv_generic: Enable interrupt for low speed VMBus devices

2024-04-11T12:55:53+00:00

Hyper-V is adding some "specialty" synthetic devices. Instead of writing
new kernel-level VMBus drivers for these devices, the devices will be
presented to user space via this existing Hyper-V generic UIO driver, so
that a user space driver can handle the device. Since these new synthetic
devices are low speed devices, they don't support monitor bits and we must
use vmbus_setevent() to enable interrupts from the host.

Signed-off-by: Saurabh Sengar 
Reviewed-by: Long Li 
Link: https://lore.kernel.org/r/1711788723-8593-4-git-send-email-ssengar@linux.microsoft.com
Signed-off-by: Greg Kroah-Hartman

uio_hv_generic: Query the ringbuffer size for device

2024-04-11T12:55:53+00:00

Query the ring buffer size from pre defined table per device
and use that value for allocating the ring buffer for that
device. Keep the size as current default which is 2 MB if
the device doesn't have any preferred ring size.

Signed-off-by: Saurabh Sengar 
Reviewed-by: Long Li 
Link: https://lore.kernel.org/r/1711788723-8593-3-git-send-email-ssengar@linux.microsoft.com
Signed-off-by: Greg Kroah-Hartman

uio: use threaded interrupts

2024-04-11T12:40:29+00:00

Split the existing uio_interrupt into a hardirq handler and a thread
function. The hardirq handler deals with the interrupt source in
hardware, the thread function notifies userspace that there is an event
to be handled.

Signed-off-by: Chris Packham 
Link: https://lore.kernel.org/r/20240408234050.2056374-3-chris.packham@alliedtelesis.co.nz
Signed-off-by: Greg Kroah-Hartman

uio_pdrv_genirq: convert to use device_property APIs

2024-04-11T12:40:29+00:00

Convert the uio_pdrv_genirq driver to use the device_property_* APIs
instead of the of_property_* ones. This allows UIO interrupts to be
defined via an ACPI overlay using the Device Tree namespace linkage.

Signed-off-by: Chris Packham 
Link: https://lore.kernel.org/r/20240408234050.2056374-2-chris.packham@alliedtelesis.co.nz
Signed-off-by: Greg Kroah-Hartman

uio: pruss: Remove this driver

2024-04-11T12:39:56+00:00

This UIO driver was used to control the PRU processors found on various
TI SoCs. It was created before the Remoteproc framework, but now with
that we have a standard way to program and manage the PRU processors.
The proper PRU Remoteproc driver should be used instead of this driver.

This driver only supported the original class of PRUSS (OMAP-L1xx /
AM17xx / AM18xx / TMS320C674x / DA8xx) but when these platforms were
switched to use Device Tree the support for DT was not added to this
driver and so it is now unused/unusable. Support for these platforms
can be added to the proper PRU Remoteproc driver if ever needed.

Remove this driver.

Signed-off-by: Andrew Davis 
Link: https://lore.kernel.org/r/20240410144803.126831-1-afd@ti.com
Signed-off-by: Greg Kroah-Hartman

uio: fsl_elbc_gpcm: Convert to platform remove callback returning void

2024-04-11T12:38:59+00:00

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.

To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König 
Link: https://lore.kernel.org/r/ca99d4e71054e8452f3cee6c016bf4f89bfc7eaa.1709933231.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman