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staging: unisys: visornic: correct visornic_pause

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Correct visornic_pause() to indicate completion asynchronously rather
than in-line

Previously, visornic_pause() (called to stop the device due to IOVM service
partition recovery) was calling the passed complete_func() in-line, rather
than delaying the calling until after the device had actually been stopped.

The behavior has been corrected so that the calling of the complete_func()
is now delayed until after the stopping of the device has been completed in
visornic_serverdown_complete(), which runs asynchronously via the workqueue
visornic_serverdown_workqueue.

Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tim Sell 2015-07-09 13:27:43 -04:00 • committed by Greg Kroah-Hartman
parent d15a65be55
commit d01da5eac0
1 changed files with 10 additions and 4 deletions
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14
drivers/staging/unisys/visornic/visornic_main.c
View file

@ -151,6 +151,7 @@ struct visornic_devdata {
* sent to the IOPART end
*/
struct work_struct serverdown_completion;
visorbus_state_complete_func server_down_complete_func;
struct work_struct timeout_reset;
struct uiscmdrsp *cmdrsp_rcv; /* cmdrsp_rcv is used for
* posting/unposting rcv buffers
@ -545,8 +546,12 @@ visornic_serverdown_complete(struct work_struct *work)
atomic_set(&devdata->num_rcvbuf_in_iovm, 0);
spin_unlock_irqrestore(&devdata->priv_lock, flags);
if (devdata->server_down_complete_func)
(*devdata->server_down_complete_func)(devdata->dev, 0);
devdata->server_down = true;
devdata->server_change_state = false;
devdata->server_down_complete_func = NULL;
}
/**
@ -558,10 +563,12 @@ visornic_serverdown_complete(struct work_struct *work)
* Returns 0 if we scheduled the work, -EINVAL on error.
*/
static int
visornic_serverdown(struct visornic_devdata *devdata)
visornic_serverdown(struct visornic_devdata *devdata,
visorbus_state_complete_func complete_func)
{
if (!devdata->server_down && !devdata->server_change_state) {
devdata->server_change_state = true;
devdata->server_down_complete_func = complete_func;
queue_work(visornic_serverdown_workqueue,
&devdata->serverdown_completion);
} else if (devdata->server_change_state) {
@ -895,7 +902,7 @@ visornic_timeout_reset(struct work_struct *work)
return;
call_serverdown:
visornic_serverdown(devdata);
visornic_serverdown(devdata, NULL);
}
/**
@ -1980,8 +1987,7 @@ static int visornic_pause(struct visor_device *dev,
{
struct visornic_devdata *devdata = dev_get_drvdata(&dev->device);
visornic_serverdown(devdata);
complete_func(dev, 0);
visornic_serverdown(devdata, complete_func);
return 0;
}