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authorChristof Schmitt <christof.schmitt@de.ibm.com>2009-03-02 13:08:57 +0100
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2009-03-12 12:58:18 -0500
commit49f0f01c9966639f8fd7ce784a412e22057d9f2a (patch)
treed6d1238eaa7467e447889639c35e5fd742ba2682 /drivers
parent94506fd1483b39cd5d66b8ccb4ead3c9cc9542ac (diff)
downloadop-kernel-dev-49f0f01c9966639f8fd7ce784a412e22057d9f2a.zip
op-kernel-dev-49f0f01c9966639f8fd7ce784a412e22057d9f2a.tar.gz
[SCSI] zfcp: Simplify latency lock handling
The lock only needs to protect the softirq context called from qdio against the userspace context called from sysfs. spin_lock and spin_lock_bh is enough. Acked-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/s390/scsi/zfcp_fsf.c5
-rw-r--r--drivers/s390/scsi/zfcp_sysfs.c5
2 files changed, 4 insertions, 6 deletions
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index 638cd5a..cce6981 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -2069,7 +2069,6 @@ static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
struct fsf_qual_latency_info *lat_inf;
struct latency_cont *lat;
struct zfcp_unit *unit = req->unit;
- unsigned long flags;
lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
@@ -2087,11 +2086,11 @@ static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
return;
}
- spin_lock_irqsave(&unit->latencies.lock, flags);
+ spin_lock(&unit->latencies.lock);
zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
lat->counter++;
- spin_unlock_irqrestore(&unit->latencies.lock, flags);
+ spin_unlock(&unit->latencies.lock);
}
#ifdef CONFIG_BLK_DEV_IO_TRACE
diff --git a/drivers/s390/scsi/zfcp_sysfs.c b/drivers/s390/scsi/zfcp_sysfs.c
index 9e9931a..14e38c2 100644
--- a/drivers/s390/scsi/zfcp_sysfs.c
+++ b/drivers/s390/scsi/zfcp_sysfs.c
@@ -318,10 +318,9 @@ zfcp_sysfs_unit_##_name##_latency_show(struct device *dev, \
struct zfcp_unit *unit = sdev->hostdata; \
struct zfcp_latencies *lat = &unit->latencies; \
struct zfcp_adapter *adapter = unit->port->adapter; \
- unsigned long flags; \
unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc; \
\
- spin_lock_irqsave(&lat->lock, flags); \
+ spin_lock_bh(&lat->lock); \
fsum = lat->_name.fabric.sum * adapter->timer_ticks; \
fmin = lat->_name.fabric.min * adapter->timer_ticks; \
fmax = lat->_name.fabric.max * adapter->timer_ticks; \
@@ -329,7 +328,7 @@ zfcp_sysfs_unit_##_name##_latency_show(struct device *dev, \
cmin = lat->_name.channel.min * adapter->timer_ticks; \
cmax = lat->_name.channel.max * adapter->timer_ticks; \
cc = lat->_name.counter; \
- spin_unlock_irqrestore(&lat->lock, flags); \
+ spin_unlock_bh(&lat->lock); \
\
do_div(fsum, 1000); \
do_div(fmin, 1000); \
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