linux/drivers/vfio/fsl-mc
Alex Williamson 7447d911af vfio/fsl-mc: Block calling interrupt handler without trigger
The eventfd_ctx trigger pointer of the vfio_fsl_mc_irq object is
initially NULL and may become NULL if the user sets the trigger
eventfd to -1.  The interrupt handler itself is guaranteed that
trigger is always valid between request_irq() and free_irq(), but
the loopback testing mechanisms to invoke the handler function
need to test the trigger.  The triggering and setting ioctl paths
both make use of igate and are therefore mutually exclusive.

The vfio-fsl-mc driver does not make use of irqfds, nor does it
support any sort of masking operations, therefore unlike vfio-pci
and vfio-platform, the flow can remain essentially unchanged.

Cc: Diana Craciun <diana.craciun@oss.nxp.com>
Cc:  <stable@vger.kernel.org>
Fixes: cc0ee20bd9 ("vfio/fsl-mc: trigger an interrupt via eventfd")
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/r/20240308230557.805580-8-alex.williamson@redhat.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2024-03-11 13:08:52 -06:00
..
Kconfig vfio/fsl: Create Kconfig sub-menu 2023-06-16 12:23:58 -06:00
Makefile vfio/fsl-mc: Add irq infrastructure for fsl-mc devices 2020-10-12 11:33:06 -06:00
vfio_fsl_mc_intr.c vfio/fsl-mc: Block calling interrupt handler without trigger 2024-03-11 13:08:52 -06:00
vfio_fsl_mc_private.h vfio: de-extern-ify function prototypes 2022-06-27 09:38:02 -06:00
vfio_fsl_mc.c vfio/fsl-mc: Use module_fsl_mc_driver macro to simplify the code 2023-08-16 11:14:15 -06:00