On 11/06/2024 23.47, Halil Pasic wrote:
Commit e3e9bda38e6d ("s390/virtio_ccw: use DMA handle from DMA API")
broke configuration change notifications for virtio-ccw by putting the
DMA address of *indicatorp directly into ccw->cda disregarding the fact
that if !!(vcdev->is_thinint) then the function
virtio_ccw_register_adapter_ind() will overwrite that ccw->cda value
with the address of the virtio_thinint_area so it can actually set up
the adapter interrupts via CCW_CMD_SET_IND_ADAPTER. Thus we end up
pointing to the wrong object for both CCW_CMD_SET_IND if setting up the
adapter interrupts fails, and for CCW_CMD_SET_CONF_IND regardless
whether it succeeds or fails.
To fix this, let us save away the dma address of *indicatorp in a local
variable, and copy it to ccw->cda after the "vcdev->is_thinint" branch.
Reported-by: Boqiao Fu <bfu@xxxxxxxxxx>
Reported-by: Sebastian Mitterle <smitterl@xxxxxxxxxx>
Fixes: e3e9bda38e6d ("s390/virtio_ccw: use DMA handle from DMA API")
Signed-off-by: Halil Pasic <pasic@xxxxxxxxxxxxx>
---
I know that checkpatch.pl complains about a missing 'Closes' tag.
Unfortunately I don't have an appropriate URL at hand. @Sebastian,
@Boqiao: do you have any suggetions?
Closes: https://issues.redhat.com/browse/RHEL-39983
?
Anyway, I've tested the patch and it indeed fixes the problem with
virtio-balloon and the link state for me:
Tested-by: Thomas Huth <thuth@xxxxxxxxxx>
