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authorSebastian Ott <sebott@linux.vnet.ibm.com>2010-03-08 12:25:17 +0100
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-03-08 12:25:30 +0100
commita290156f479af436f94ac23f5729a1e33c94293b (patch)
treea0bf6cf6e673cc4dd4da081d95c19f69d2832e9a
parent52898025cf7d458d029c18773d0ef49b4789d829 (diff)
downloadlinux-stericsson-a290156f479af436f94ac23f5729a1e33c94293b.tar.gz
[S390] cio: fix init_count in case of recognition after steal lock
After we try to steal a lock on a ccw device in boxed state, we have to restart device recognition and potentially reprobing. In this case ccw_device_init_count was erroneously decreased twice. This patch fixes the issue. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--drivers/s390/cio/device.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index c6abb75c4615..6d229f3523a0 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -764,7 +764,7 @@ static void sch_create_and_recog_new_device(struct subchannel *sch)
static void io_subchannel_register(struct ccw_device *cdev)
{
struct subchannel *sch;
- int ret;
+ int ret, adjust_init_count = 1;
unsigned long flags;
sch = to_subchannel(cdev->dev.parent);
@@ -793,6 +793,7 @@ static void io_subchannel_register(struct ccw_device *cdev)
cdev->private->dev_id.ssid,
cdev->private->dev_id.devno);
}
+ adjust_init_count = 0;
goto out;
}
/*
@@ -818,7 +819,7 @@ out:
cdev->private->flags.recog_done = 1;
wake_up(&cdev->private->wait_q);
out_err:
- if (atomic_dec_and_test(&ccw_device_init_count))
+ if (adjust_init_count && atomic_dec_and_test(&ccw_device_init_count))
wake_up(&ccw_device_init_wq);
}