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| author | Neil Horman | 2015-08-01 00:56:32 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2015-08-04 02:45:02 +0200 |
| commit | fdc792cd1b5c86cb34770707aa1b04edce5288cf (patch) | |
| tree | 4a47e45329aa668ed914812fbfa7a15b9f20d011 /drivers/staging/unisys/include/visorbus.h | |
| parent | staging: android: Allow compile test of GPIO consumers if !GPIOLIB (diff) | |
| download | kernel-qcow2-linux-fdc792cd1b5c86cb34770707aa1b04edce5288cf.tar.gz kernel-qcow2-linux-fdc792cd1b5c86cb34770707aa1b04edce5288cf.tar.xz kernel-qcow2-linux-fdc792cd1b5c86cb34770707aa1b04edce5288cf.zip | |
staging: unisys: visorchannel: Add peek function
According to unisys, the s_par hypervisor has a bug in which it never
triggers an interrupt. That makes the visornic effectively a 2ms poll
loop. In order to just have the rx thread shceduling a napi poll every
2ms, lets instead give it the chance to check the response queue for
data before we schedule. This helper provides that functionality
Signed-off-by: Neil Horman <nhorman@redhat.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/unisys/include/visorbus.h')
| -rw-r--r-- | drivers/staging/unisys/include/visorbus.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/staging/unisys/include/visorbus.h b/drivers/staging/unisys/include/visorbus.h index a0144c6a8ad1..9235536fa75f 100644 --- a/drivers/staging/unisys/include/visorbus.h +++ b/drivers/staging/unisys/include/visorbus.h @@ -201,6 +201,8 @@ bool visorchannel_signalremove(struct visorchannel *channel, u32 queue, void *msg); bool visorchannel_signalinsert(struct visorchannel *channel, u32 queue, void *msg); +bool visorchannel_signalempty(struct visorchannel *channel, u32 queue); + int visorchannel_signalqueue_slots_avail(struct visorchannel *channel, u32 queue); int visorchannel_signalqueue_max_slots(struct visorchannel *channel, u32 queue); |