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authorAlexandre Bounine <alexandre.bounine@idt.com>2016-03-23 00:26:41 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-23 01:36:02 +0300
commitb6cb95e8eb97e51a1a1b5609b59df859cc6dc2f2 (patch)
tree9b4f2bdd88833156a48b07ac845ff7c5ec54feeb /drivers/rapidio
parent5024622f583eb242ed8040d0b9d1e0d2458d1db8 (diff)
downloadlinux-b6cb95e8eb97e51a1a1b5609b59df859cc6dc2f2.tar.xz
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>
Diffstat (limited to 'drivers/rapidio')
-rw-r--r--drivers/rapidio/rio-scan.c11
-rw-r--r--drivers/rapidio/rio.c19
2 files changed, 19 insertions, 11 deletions
diff --git a/drivers/rapidio/rio-scan.c b/drivers/rapidio/rio-scan.c
index f730914f6ff6..a63a380809d1 100644
--- a/drivers/rapidio/rio-scan.c
+++ b/drivers/rapidio/rio-scan.c
@@ -974,17 +974,6 @@ static void rio_init_em(struct rio_dev *rdev)
}
/**
- * rio_pw_enable - Enables/disables port-write handling by a master port
- * @port: Master port associated with port-write handling
- * @enable: 1=enable, 0=disable
- */
-static void rio_pw_enable(struct rio_mport *port, int enable)
-{
- if (port->ops->pwenable)
- port->ops->pwenable(port, enable);
-}
-
-/**
* rio_enum_mport- Start enumeration through a master port
* @mport: Master port to send transactions
* @flags: Enumeration control flags
diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c
index 095801c4d239..673774bf6dd6 100644
--- a/drivers/rapidio/rio.c
+++ b/drivers/rapidio/rio.c
@@ -560,6 +560,24 @@ int rio_release_inb_pwrite(struct rio_dev *rdev)
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 @@ int rio_mport_initialize(struct rio_mport *mport)
mport->host_deviceid = rio_get_hdid(mport->id);
mport->nscan = NULL;
mutex_init(&mport->lock);
+ mport->pwe_refcnt = 0;
return 0;
}