linux-kernel - [PATCH v2 06/18] firmware: arm_ffa: Refactor addition of partition information into XArray

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Message-Id: <20250131-ffa_updates-v2-6-544ba4e35387@arm.com>
Date: Fri, 31 Jan 2025 11:24:06 +0000
From: Sudeep Holla <sudeep.holla@....com>
To: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Sudeep Holla <sudeep.holla@....com>, Viresh Kumar <viresh.kumar@...aro.org>
Subject: [PATCH v2 06/18] firmware: arm_ffa: Refactor addition of partition
 information into XArray

From: Viresh Kumar <viresh.kumar@...aro.org>

Move the common code handling addition of the FF-A partition information
into the XArray as a new routine. No functional change.

Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@....com>
---
 drivers/firmware/arm_ffa/driver.c | 48 +++++++++++++++++++--------------------
 1 file changed, 23 insertions(+), 25 deletions(-)

diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c
index 87e106c728b89f3ce7c11219cf7cad9cc166dda2..67d5be261d83633805c81dd84fdfc2b5c702f3ca 100644
--- a/drivers/firmware/arm_ffa/driver.c
+++ b/drivers/firmware/arm_ffa/driver.c
@@ -1423,11 +1423,30 @@ static struct notifier_block ffa_bus_nb = {
 	.notifier_call = ffa_bus_notifier,
 };
 
+static int ffa_xa_add_partition_info(int vm_id)
+{
+	struct ffa_dev_part_info *info;
+	int ret;
+
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	rwlock_init(&info->rw_lock);
+	ret = xa_insert(&drv_info->partition_info, vm_id, info, GFP_KERNEL);
+	if (ret) {
+		pr_err("%s: failed to save partition ID 0x%x - ret:%d. Abort.\n",
+		       __func__, vm_id, ret);
+		kfree(info);
+	}
+
+	return ret;
+}
+
 static int ffa_setup_partitions(void)
 {
 	int count, idx, ret;
 	struct ffa_device *ffa_dev;
-	struct ffa_dev_part_info *info;
 	struct ffa_partition_info *pbuf, *tpbuf;
 
 	if (drv_info->version == FFA_VERSION_1_0) {
@@ -1461,39 +1480,18 @@ static int ffa_setup_partitions(void)
 		    !(tpbuf->properties & FFA_PARTITION_AARCH64_EXEC))
 			ffa_mode_32bit_set(ffa_dev);
 
-		info = kzalloc(sizeof(*info), GFP_KERNEL);
-		if (!info) {
+		if (ffa_xa_add_partition_info(ffa_dev->vm_id)) {
 			ffa_device_unregister(ffa_dev);
 			continue;
 		}
-		rwlock_init(&info->rw_lock);
-		ret = xa_insert(&drv_info->partition_info, tpbuf->id,
-				info, GFP_KERNEL);
-		if (ret) {
-			pr_err("%s: failed to save partition ID 0x%x - ret:%d\n",
-			       __func__, tpbuf->id, ret);
-			ffa_device_unregister(ffa_dev);
-			kfree(info);
-		}
+
 	}
 
 	kfree(pbuf);
 
 	/* Allocate for the host */
-	info = kzalloc(sizeof(*info), GFP_KERNEL);
-	if (!info) {
-		/* Already registered devices are freed on bus_exit */
-		ffa_partitions_cleanup();
-		return -ENOMEM;
-	}
-
-	rwlock_init(&info->rw_lock);
-	ret = xa_insert(&drv_info->partition_info, drv_info->vm_id,
-			info, GFP_KERNEL);
+	ret = ffa_xa_add_partition_info(drv_info->vm_id);
 	if (ret) {
-		pr_err("%s: failed to save Host partition ID 0x%x - ret:%d. Abort.\n",
-		       __func__, drv_info->vm_id, ret);
-		kfree(info);
 		/* Already registered devices are freed on bus_exit */
 		ffa_partitions_cleanup();
 	}

-- 
2.34.1