rapidio: move rio_pw_enable into core code
Make rio_pw_enable() routine available to other RapidIO drivers.
Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c
index 095801c..673774b 100644
--- a/drivers/rapidio/rio.c
+++ b/drivers/rapidio/rio.c
@@ -560,6 +560,24 @@
EXPORT_SYMBOL_GPL(rio_release_inb_pwrite);
/**
+ * rio_pw_enable - Enables/disables port-write handling by a master port
+ * @mport: Master port associated with port-write handling
+ * @enable: 1=enable, 0=disable
+ */
+void rio_pw_enable(struct rio_mport *mport, int enable)
+{
+ if (mport->ops->pwenable) {
+ mutex_lock(&mport->lock);
+
+ if ((enable && ++mport->pwe_refcnt == 1) ||
+ (!enable && mport->pwe_refcnt && --mport->pwe_refcnt == 0))
+ mport->ops->pwenable(mport, enable);
+ mutex_unlock(&mport->lock);
+ }
+}
+EXPORT_SYMBOL_GPL(rio_pw_enable);
+
+/**
* rio_map_inb_region -- Map inbound memory region.
* @mport: Master port.
* @local: physical address of memory region to be mapped
@@ -2041,6 +2059,7 @@
mport->host_deviceid = rio_get_hdid(mport->id);
mport->nscan = NULL;
mutex_init(&mport->lock);
+ mport->pwe_refcnt = 0;
return 0;
}