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git.kernel.org/linux-stable/linux-4.20.y
linux-imx/drivers/virtio
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Wei Wang de970bee0d virtio-balloon: tweak config_changed implementation 
commit bf4dc0b2be upstream.

virtio-ccw has deadlock issues with reading the config space inside the
interrupt context, so we tweak the virtballoon_changed implementation
by moving the config read operations into the related workqueue contexts.
The config_read_bitmap is used as a flag to the workqueue callbacks
about the related config fields that need to be read.

The cmd_id_received is also renamed to cmd_id_received_cache, and
the value should be obtained via virtio_balloon_cmd_id_received.

Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 86a559787e ("virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT")
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-22 21:09:52 +01:00
..
Kconfig virtio: make VIRTIO a menuconfig to ease disabling it all 2018-02-01 16:26:43 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
virtio_balloon.c virtio-balloon: tweak config_changed implementation 2019-01-22 21:09:52 +01:00
virtio_input.c virtio: wrap find_vqs 2017-05-02 23:41:42 +03:00
virtio_mmio.c virtio: don't allocate vqs when names[i] = NULL 2019-01-22 21:09:52 +01:00
virtio_pci_common.c virtio: Make vp_set_vq_affinity() take a mask. 2018-08-11 12:02:18 -07:00
virtio_pci_common.h virtio: Make vp_set_vq_affinity() take a mask. 2018-08-11 12:02:18 -07:00
virtio_pci_legacy.c virtio: pci-legacy: Validate queue pfn 2018-08-22 00:56:58 +03:00
virtio_pci_modern.c virtio_pci: support enabling VFs 2018-06-12 04:59:29 +03:00
virtio_ring.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
virtio.c virtio: split device_register into device_initialize and device_add 2018-02-01 16:26:45 +02:00