From: Vineeth Vijayan vneethv@linux.ibm.com
[ Upstream commit b1b0d5aec1cf9f9a900a14964f869c68688d923e ]
Currently when the new channel-path is enabled, we do evaluation only on the subchannels with a device connected on it. This is because, in the past, if the device in the subchannel is not working or not available, we used to unregister the subchannels. But, from the 'commit 2297791c92d0 ("s390/cio: dont unregister subchannel from child-drivers")' we allow subchannels with or without an active device connected on it. So, when we do the io_subchannel_verify, make sure that, we are evaluating the subchannels without any device too.
Fixes: 2297791c92d0 ("s390/cio: dont unregister subchannel from child-drivers") Reported-by: Boris Fiuczynski fiuczy@linux.ibm.com Signed-off-by: Vineeth Vijayan vneethv@linux.ibm.com Reviewed-by: Peter Oberparleiter oberpar@linux.ibm.com Signed-off-by: Alexander Gordeev agordeev@linux.ibm.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/s390/cio/device.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 61cde02b23fec..b21fa57d1a46b 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -1116,6 +1116,8 @@ static void io_subchannel_verify(struct subchannel *sch) cdev = sch_get_cdev(sch); if (cdev) dev_fsm_event(cdev, DEV_EVENT_VERIFY); + else + css_schedule_eval(sch->schid); }
static void io_subchannel_terminate_path(struct subchannel *sch, u8 mask)