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From:   trix@redhat.com
To:     hao.wu@intel.com, mdf@kernel.org, michal.simek@xilinx.com
Cc:     linux-fpga@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, Tom Rix <trix@redhat.com>
Subject: [PATCH v2 4/7] fpga-mgr: wrap the status() op
Date:   Tue,  8 Jun 2021 12:55:03 -0700
Message-Id: <20210608195506.3022550-6-trix@redhat.com>
In-Reply-To: <20210608195506.3022550-1-trix@redhat.com>
References: <20210608195506.3022550-1-trix@redhat.com>
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From: Tom Rix <trix@redhat.com>

An FPGA manager is not required to provide a status() op.
Add a wrapper consistent with the other op wrappers.
Move the op check to the wrapper.
Default to 0, no errors to report.

Signed-off-by: Tom Rix <trix@redhat.com>
---
 drivers/fpga/fpga-mgr.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
index c484b4309b2f4..cc531f0537acf 100644
--- a/drivers/fpga/fpga-mgr.c
+++ b/drivers/fpga/fpga-mgr.c
@@ -426,6 +426,14 @@ static ssize_t state_show(struct device *dev,
 	return sprintf(buf, "%s\n", state_str[mgr->state]);
 }
 
+static u64 fpga_mgr_status(struct fpga_manager *mgr)
+{
+	if (mgr->mops && mgr->mops->status)
+		return mgr->mops->status(mgr);
+
+	return 0;
+}
+
 static ssize_t status_show(struct device *dev,
 			   struct device_attribute *attr, char *buf)
 {
@@ -433,10 +441,7 @@ static ssize_t status_show(struct device *dev,
 	u64 status;
 	int len = 0;
 
-	if (!mgr->mops->status)
-		return -ENOENT;
-
-	status = mgr->mops->status(mgr);
+	status = fpga_mgr_status(mgr);
 
 	if (status & FPGA_MGR_STATUS_OPERATION_ERR)
 		len += sprintf(buf + len, "reconfig operation error\n");
-- 
2.26.3