workqueue: skip the node_nr_active update for non-unbound workqueuesgrafted

apply_wqattrs_commit() updates node_nr_active->max unconditionally.
wq->node_nr_active[] is only allocated for unbound workqueues, so guard
the call before per-cpu workqueues start using this path.

No functional change: only unbound workqueues reach apply_wqattrs_*()
today.

Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 143 insertions, 0 deletions

diff --git a/drivers/rapidio/rio-access.c b/drivers/rapidio/rio-access.c
new file mode 100644
index 000000000..f9e10647f
--- /dev/null
+++ b/drivers/rapidio/rio-access.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * RapidIO configuration space access support
+ *
+ * Copyright 2005 MontaVista Software, Inc.
+ * Matt Porter <mporter@kernel.crashing.org>
+ */
+
+#include <linux/rio.h>
+#include <linux/module.h>
+
+#include <linux/rio_drv.h>
+
+/*
+ *  Wrappers for all RIO configuration access functions.  They just check
+ *  alignment and call the low-level functions pointed to by rio_mport->ops.
+ */
+
+#define RIO_8_BAD 0
+#define RIO_16_BAD (offset & 1)
+#define RIO_32_BAD (offset & 3)
+
+/**
+ * RIO_LOP_READ - Generate rio_local_read_config_* functions
+ * @size: Size of configuration space read (8, 16, 32 bits)
+ * @type: C type of value argument
+ * @len: Length of configuration space read (1, 2, 4 bytes)
+ *
+ * Generates rio_local_read_config_* functions used to access
+ * configuration space registers on the local device.
+ */
+#define RIO_LOP_READ(size,type,len) \
+int __rio_local_read_config_##size \
+	(struct rio_mport *mport, u32 offset, type *value)		\
+{									\
+	int res;							\
+	u32 data = 0;							\
+	if (RIO_##size##_BAD) return RIO_BAD_SIZE;			\
+	res = mport->ops->lcread(mport, mport->id, offset, len, &data);	\
+	*value = (type)data;						\
+	return res;							\
+}
+
+/**
+ * RIO_LOP_WRITE - Generate rio_local_write_config_* functions
+ * @size: Size of configuration space write (8, 16, 32 bits)
+ * @type: C type of value argument
+ * @len: Length of configuration space write (1, 2, 4 bytes)
+ *
+ * Generates rio_local_write_config_* functions used to access
+ * configuration space registers on the local device.
+ */
+#define RIO_LOP_WRITE(size,type,len) \
+int __rio_local_write_config_##size \
+	(struct rio_mport *mport, u32 offset, type value)		\
+{									\
+	if (RIO_##size##_BAD) return RIO_BAD_SIZE;			\
+	return mport->ops->lcwrite(mport, mport->id, offset, len, value);\
+}
+
+RIO_LOP_READ(8, u8, 1)
+RIO_LOP_READ(16, u16, 2)
+RIO_LOP_READ(32, u32, 4)
+RIO_LOP_WRITE(8, u8, 1)
+RIO_LOP_WRITE(16, u16, 2)
+RIO_LOP_WRITE(32, u32, 4)
+
+EXPORT_SYMBOL_GPL(__rio_local_read_config_8);
+EXPORT_SYMBOL_GPL(__rio_local_read_config_16);
+EXPORT_SYMBOL_GPL(__rio_local_read_config_32);
+EXPORT_SYMBOL_GPL(__rio_local_write_config_8);
+EXPORT_SYMBOL_GPL(__rio_local_write_config_16);
+EXPORT_SYMBOL_GPL(__rio_local_write_config_32);
+
+/**
+ * RIO_OP_READ - Generate rio_mport_read_config_* functions
+ * @size: Size of configuration space read (8, 16, 32 bits)
+ * @type: C type of value argument
+ * @len: Length of configuration space read (1, 2, 4 bytes)
+ *
+ * Generates rio_mport_read_config_* functions used to access
+ * configuration space registers on the local device.
+ */
+#define RIO_OP_READ(size,type,len) \
+int rio_mport_read_config_##size \
+	(struct rio_mport *mport, u16 destid, u8 hopcount, u32 offset, type *value)	\
+{									\
+	int res;							\
+	u32 data = 0;							\
+	if (RIO_##size##_BAD) return RIO_BAD_SIZE;			\
+	res = mport->ops->cread(mport, mport->id, destid, hopcount, offset, len, &data); \
+	*value = (type)data;						\
+	return res;							\
+}
+
+/**
+ * RIO_OP_WRITE - Generate rio_mport_write_config_* functions
+ * @size: Size of configuration space write (8, 16, 32 bits)
+ * @type: C type of value argument
+ * @len: Length of configuration space write (1, 2, 4 bytes)
+ *
+ * Generates rio_mport_write_config_* functions used to access
+ * configuration space registers on the local device.
+ */
+#define RIO_OP_WRITE(size,type,len) \
+int rio_mport_write_config_##size \
+	(struct rio_mport *mport, u16 destid, u8 hopcount, u32 offset, type value)	\
+{									\
+	if (RIO_##size##_BAD) return RIO_BAD_SIZE;			\
+	return mport->ops->cwrite(mport, mport->id, destid, hopcount,	\
+			offset, len, value);				\
+}
+
+RIO_OP_READ(8, u8, 1)
+RIO_OP_READ(16, u16, 2)
+RIO_OP_READ(32, u32, 4)
+RIO_OP_WRITE(8, u8, 1)
+RIO_OP_WRITE(16, u16, 2)
+RIO_OP_WRITE(32, u32, 4)
+
+EXPORT_SYMBOL_GPL(rio_mport_read_config_8);
+EXPORT_SYMBOL_GPL(rio_mport_read_config_16);
+EXPORT_SYMBOL_GPL(rio_mport_read_config_32);
+EXPORT_SYMBOL_GPL(rio_mport_write_config_8);
+EXPORT_SYMBOL_GPL(rio_mport_write_config_16);
+EXPORT_SYMBOL_GPL(rio_mport_write_config_32);
+
+/**
+ * rio_mport_send_doorbell - Send a doorbell message
+ *
+ * @mport: RIO master port
+ * @destid: RIO device destination ID
+ * @data: Doorbell message data
+ *
+ * Send a doorbell message to a RIO device. The doorbell message
+ * has a 16-bit info field provided by the data argument.
+ */
+int rio_mport_send_doorbell(struct rio_mport *mport, u16 destid, u16 data)
+{
+	return mport->ops->dsend(mport, mport->id, destid, data);
+}
+
+EXPORT_SYMBOL_GPL(rio_mport_send_doorbell);