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vfio-ccw: Reset FSM state to IDLE inside FSM 

When an I/O request is made, the fsm_io_request() routine
moves the FSM state from IDLE to CP_PROCESSING, and then
fsm_io_helper() moves it to CP_PENDING if the START SUBCHANNEL
received a cc0. Yet, the error case to go from CP_PROCESSING
back to IDLE is done after the FSM call returns.

Let's move this up into the FSM proper, to provide some
better symmetry when unwinding in this case.

Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Matthew Rosato <mjrosato@linux.ibm.com>
Message-Id: <20210511195631.3995081-3-farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Eric Farman 2021-05-11 21:56:30 +02:00 committed by Cornelia Huck
parent c6c82e0cd8
commit 6c02ac4c92
2 changed files with 1 additions and 2 deletions
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1
drivers/s390/cio/vfio_ccw_fsm.c
View File

@ -318,6 +318,7 @@ static void fsm_io_request(struct vfio_ccw_private *private,
}
err_out:
private->state = VFIO_CCW_STATE_IDLE;
trace_vfio_ccw_fsm_io_request(scsw->cmd.fctl, schid,
io_region->ret_code, errstr);
}

2
drivers/s390/cio/vfio_ccw_ops.c
View File

@ -279,8 +279,6 @@ static ssize_t vfio_ccw_mdev_write_io_region(struct vfio_ccw_private *private,
}
vfio_ccw_fsm_event(private, VFIO_CCW_EVENT_IO_REQ);
if (region->ret_code != 0)
private->state = VFIO_CCW_STATE_IDLE;
ret = (region->ret_code != 0) ? region->ret_code : count;
out_unlock: