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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 v3 1/7] fpga-mgr: wrap the write_init() op
Date: Wed, 23 Jun 2021 11:24:04 -0700	[thread overview]
Message-ID: <20210623182410.3787784-3-trix@redhat.com> (raw)
In-Reply-To: <20210623182410.3787784-1-trix@redhat.com>

From: Tom Rix <trix@redhat.com>

An FPGA manager should not be required to provide a
write_init() op if there is nothing for it do.
So add a wrapper and move the op checking.
Default to success.

Signed-off-by: Tom Rix <trix@redhat.com>
---
 drivers/fpga/fpga-mgr.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
index ecb4c3c795fa5..87bbb940c9504 100644
--- a/drivers/fpga/fpga-mgr.c
+++ b/drivers/fpga/fpga-mgr.c
@@ -69,6 +69,14 @@ void fpga_image_info_free(struct fpga_image_info *info)
 }
 EXPORT_SYMBOL_GPL(fpga_image_info_free);
 
+static int fpga_mgr_write_init(struct fpga_manager *mgr,
+			       struct fpga_image_info *info,
+			       const char *buf, size_t count)
+{
+	if (mgr->mops && mgr->mops->write_init)
+		return  mgr->mops->write_init(mgr, info, buf, count);
+	return 0;
+}
 /*
  * Call the low level driver's write_init function.  This will do the
  * device-specific things to get the FPGA into the state where it is ready to
@@ -83,9 +91,9 @@ static int fpga_mgr_write_init_buf(struct fpga_manager *mgr,
 
 	mgr->state = FPGA_MGR_STATE_WRITE_INIT;
 	if (!mgr->mops->initial_header_size)
-		ret = mgr->mops->write_init(mgr, info, NULL, 0);
+		ret = fpga_mgr_write_init(mgr, info, NULL, 0);
 	else
-		ret = mgr->mops->write_init(
+		ret = fpga_mgr_write_init(
 		    mgr, info, buf, min(mgr->mops->initial_header_size, count));
 
 	if (ret) {
@@ -569,7 +577,7 @@ struct fpga_manager *fpga_mgr_create(struct device *parent, const char *name,
 	int id, ret;
 
 	if (!mops || !mops->write_complete || !mops->state ||
-	    !mops->write_init || (!mops->write && !mops->write_sg) ||
+	    (!mops->write && !mops->write_sg) ||
 	    (mops->write && mops->write_sg)) {
 		dev_err(parent, "Attempt to register without fpga_manager_ops\n");
 		return NULL;
-- 
2.26.3


  reply	other threads:[~2021-06-23 18:24 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-23 18:24 [PATCH v3 0/7] wrappers for fpga_manager_ops trix
2021-06-23 18:24 ` trix [this message]
2021-06-24  7:54   ` [PATCH v3 1/7] fpga-mgr: wrap the write_init() op Xu Yilun
2021-06-24 14:37     ` Tom Rix
2021-06-23 18:24 ` [PATCH v3 2/7] fpga-mgr: make write_complete() op optional trix
2021-06-23 18:24 ` [PATCH v3 3/7] fpga-mgr: wrap the write() op trix
2021-06-23 18:24 ` [PATCH v3 4/7] fpga-mgr: wrap the status() op trix
2021-06-23 18:24 ` [PATCH v3 5/7] fpga-mgr: wrap the state() op trix
2021-06-23 18:24 ` [PATCH v3 6/7] fpga-mgr: wrap the fpga_remove() op trix
2021-06-23 18:24 ` [PATCH v3 7/7] fpga-mgr: collect wrappers and change to inline trix

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