linux-kernel - [PATCH v2 2/7] remoteproc: Split firmware name allocation from rproc

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Date:   Wed, 15 Apr 2020 14:48:53 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     bjorn.andersson@...aro.org, ohad@...ery.com
Cc:     s-anna@...com, elder@...aro.org, Markus.Elfring@....de,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/7] remoteproc: Split firmware name allocation from rproc_alloc()

Make the firmware name allocation a function on its own in an
effort to cleanup function rproc_alloc().

Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
---
 drivers/remoteproc/remoteproc_core.c | 66 ++++++++++++++++------------
 1 file changed, 39 insertions(+), 27 deletions(-)

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 80056513ae71..4dee63f319ba 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1979,6 +1979,33 @@ static const struct device_type rproc_type = {
 	.release	= rproc_type_release,
 };
 
+static int rproc_alloc_firmware(struct rproc *rproc,
+				const char *name, const char *firmware)
+{
+	char *p, *template = "rproc-%s-fw";
+	int name_len;
+
+	if (!firmware) {
+		/*
+		 * If the caller didn't pass in a firmware name then
+		 * construct a default name.
+		 */
+		name_len = strlen(name) + strlen(template) - 2 + 1;
+		p = kmalloc(name_len, GFP_KERNEL);
+		if (!p)
+			return -ENOMEM;
+		snprintf(p, name_len, template, name);
+	} else {
+		p = kstrdup(firmware, GFP_KERNEL);
+		if (!p)
+			return -ENOMEM;
+	}
+
+	rproc->firmware = p;
+
+	return 0;
+}
+
 /**
  * rproc_alloc() - allocate a remote processor handle
  * @dev: the underlying device
@@ -2007,42 +2034,21 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
 			  const char *firmware, int len)
 {
 	struct rproc *rproc;
-	char *p, *template = "rproc-%s-fw";
-	int name_len;
 
 	if (!dev || !name || !ops)
 		return NULL;
 
-	if (!firmware) {
-		/*
-		 * If the caller didn't pass in a firmware name then
-		 * construct a default name.
-		 */
-		name_len = strlen(name) + strlen(template) - 2 + 1;
-		p = kmalloc(name_len, GFP_KERNEL);
-		if (!p)
-			return NULL;
-		snprintf(p, name_len, template, name);
-	} else {
-		p = kstrdup(firmware, GFP_KERNEL);
-		if (!p)
-			return NULL;
-	}
-
 	rproc = kzalloc(sizeof(struct rproc) + len, GFP_KERNEL);
-	if (!rproc) {
-		kfree(p);
+	if (!rproc)
 		return NULL;
-	}
+
+	if (rproc_alloc_firmware(rproc, name, firmware))
+		goto free_rproc;
 
 	rproc->ops = kmemdup(ops, sizeof(*ops), GFP_KERNEL);
-	if (!rproc->ops) {
-		kfree(p);
-		kfree(rproc);
-		return NULL;
-	}
+	if (!rproc->ops)
+		goto free_firmware;
 
-	rproc->firmware = p;
 	rproc->name = name;
 	rproc->priv = &rproc[1];
 	rproc->auto_boot = true;
@@ -2091,6 +2097,12 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
 	rproc->state = RPROC_OFFLINE;
 
 	return rproc;
+
+free_firmware:
+	kfree(rproc->firmware);
+free_rproc:
+	kfree(rproc);
+	return NULL;
 }
 EXPORT_SYMBOL(rproc_alloc);
 
-- 
2.20.1