linux-kernel - [PATCH v2 5/7] fpga-mgr: wrap the state() op

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Message-Id: <20210608195506.3022550-7-trix@redhat.com>
Date:   Tue,  8 Jun 2021 12:55:04 -0700
From:   trix@...hat.com
To:     hao.wu@...el.com, mdf@...nel.org, michal.simek@...inx.com
Cc:     linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, Tom Rix <trix@...hat.com>
Subject: [PATCH v2 5/7] fpga-mgr: wrap the state() op

From: Tom Rix <trix@...hat.com>

An FPGA manager should not be required to provide a state() op.
Add a wrapper consistent with the other op wrappers.
Move op check to wrapper.
Default to FPGA_MGR_STATE_UNKNOWN, what noop state() ops use.
Remove unneeded noop state() ops

Signed-off-by: Tom Rix <trix@...hat.com>
---
 drivers/fpga/dfl-fme-mgr.c   |  6 ------
 drivers/fpga/fpga-mgr.c      | 11 +++++++++--
 drivers/fpga/stratix10-soc.c |  6 ------
 drivers/fpga/ts73xx-fpga.c   |  6 ------
 4 files changed, 9 insertions(+), 20 deletions(-)

diff --git a/drivers/fpga/dfl-fme-mgr.c b/drivers/fpga/dfl-fme-mgr.c
index d5861d13b3069..313420405d5e8 100644
--- a/drivers/fpga/dfl-fme-mgr.c
+++ b/drivers/fpga/dfl-fme-mgr.c
@@ -252,11 +252,6 @@ static int fme_mgr_write_complete(struct fpga_manager *mgr,
 	return 0;
 }
 
-static enum fpga_mgr_states fme_mgr_state(struct fpga_manager *mgr)
-{
-	return FPGA_MGR_STATE_UNKNOWN;
-}
-
 static u64 fme_mgr_status(struct fpga_manager *mgr)
 {
 	struct fme_mgr_priv *priv = mgr->priv;
@@ -268,7 +263,6 @@ static const struct fpga_manager_ops fme_mgr_ops = {
 	.write_init = fme_mgr_write_init,
 	.write = fme_mgr_write,
 	.write_complete = fme_mgr_write_complete,
-	.state = fme_mgr_state,
 	.status = fme_mgr_status,
 };
 
diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
index cc531f0537acf..d06752be9c6ef 100644
--- a/drivers/fpga/fpga-mgr.c
+++ b/drivers/fpga/fpga-mgr.c
@@ -589,7 +589,7 @@ struct fpga_manager *fpga_mgr_create(struct device *dev, const char *name,
 	struct fpga_manager *mgr;
 	int id, ret;
 
-	if (!mops || !mops->state) {
+	if (!mops) {
 		dev_err(dev, "Attempt to register without fpga_manager_ops\n");
 		return NULL;
 	}
@@ -692,6 +692,13 @@ struct fpga_manager *devm_fpga_mgr_create(struct device *dev, const char *name,
 }
 EXPORT_SYMBOL_GPL(devm_fpga_mgr_create);
 
+static enum fpga_mgr_states fpga_mgr_state(struct fpga_manager *mgr)
+{
+	if (mgr->mops && mgr->mops->state)
+		return  mgr->mops->state(mgr);
+	return FPGA_MGR_STATE_UNKNOWN;
+}
+
 /**
  * fpga_mgr_register - register a FPGA manager
  * @mgr: fpga manager struct
@@ -707,7 +714,7 @@ int fpga_mgr_register(struct fpga_manager *mgr)
 	 * from device.  FPGA may be in reset mode or may have been programmed
 	 * by bootloader or EEPROM.
 	 */
-	mgr->state = mgr->mops->state(mgr);
+	mgr->state = fpga_mgr_state(mgr);
 
 	ret = device_add(&mgr->dev);
 	if (ret)
diff --git a/drivers/fpga/stratix10-soc.c b/drivers/fpga/stratix10-soc.c
index 657a70c5fc996..5219fa1b555af 100644
--- a/drivers/fpga/stratix10-soc.c
+++ b/drivers/fpga/stratix10-soc.c
@@ -388,13 +388,7 @@ static int s10_ops_write_complete(struct fpga_manager *mgr,
 	return ret;
 }
 
-static enum fpga_mgr_states s10_ops_state(struct fpga_manager *mgr)
-{
-	return FPGA_MGR_STATE_UNKNOWN;
-}
-
 static const struct fpga_manager_ops s10_ops = {
-	.state = s10_ops_state,
 	.write_init = s10_ops_write_init,
 	.write = s10_ops_write,
 	.write_complete = s10_ops_write_complete,
diff --git a/drivers/fpga/ts73xx-fpga.c b/drivers/fpga/ts73xx-fpga.c
index 101f016c6ed8c..167abb0b08d40 100644
--- a/drivers/fpga/ts73xx-fpga.c
+++ b/drivers/fpga/ts73xx-fpga.c
@@ -32,11 +32,6 @@ struct ts73xx_fpga_priv {
 	struct device	*dev;
 };
 
-static enum fpga_mgr_states ts73xx_fpga_state(struct fpga_manager *mgr)
-{
-	return FPGA_MGR_STATE_UNKNOWN;
-}
-
 static int ts73xx_fpga_write_init(struct fpga_manager *mgr,
 				  struct fpga_image_info *info,
 				  const char *buf, size_t count)
@@ -98,7 +93,6 @@ static int ts73xx_fpga_write_complete(struct fpga_manager *mgr,
 }
 
 static const struct fpga_manager_ops ts73xx_fpga_ops = {
-	.state		= ts73xx_fpga_state,
 	.write_init	= ts73xx_fpga_write_init,
 	.write		= ts73xx_fpga_write,
 	.write_complete	= ts73xx_fpga_write_complete,
-- 
2.26.3