[PATCH v2 3/8] firmware: smccc: lfa: Move image rescanning

[Andre Przywara <andre.przywara@arm.com>]

From: Vedashree Vidwans <vvidwans@nvidia.com>

After an image activation, the list of firmware images might change, so
we have to re-iterate them through the SMC interface.
Move the corresponding code from the activate_fw_image() function into
update_fw_images_tree(), where it could be reused more easily, for
instance when triggered by an interrupt.

Signed-off-by: Vedashree Vidwans <vvidwans@nvidia.com>
[Andre: split off from another patch, rebased]
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
---
 drivers/firmware/smccc/lfa_fw.c | 46 ++++++++++++++++-----------------
 1 file changed, 22 insertions(+), 24 deletions(-)

diff --git a/drivers/firmware/smccc/lfa_fw.c b/drivers/firmware/smccc/lfa_fw.c
index 284b7c18d3d0..4831abf2b60e 100644
--- a/drivers/firmware/smccc/lfa_fw.c
+++ b/drivers/firmware/smccc/lfa_fw.c
@@ -310,7 +310,6 @@ static int call_lfa_activate(void *data)
 
 static int activate_fw_image(struct fw_image *image)
 {
-	struct kobject *kobj;
 	int ret;
 
 retry:
@@ -320,31 +319,8 @@ static int activate_fw_image(struct fw_image *image)
 		ret = call_lfa_activate(image);
 
 	if (!ret) {
-		/*
-		 * Invalidate fw_seq_ids (-1) for all images as the seq_ids
-		 * and the number of firmware images in the LFA agent may
-		 * change after a successful activation attempt.
-		 * Negate all image flags as well.
-		 */
-		spin_lock(&lfa_kset->list_lock);
-		list_for_each_entry(kobj, &lfa_kset->list, entry) {
-			struct fw_image *image = kobj_to_fw_image(kobj);
-
-			set_image_flags(image, -1, 0b1000, 0, 0);
-		}
-		spin_unlock(&lfa_kset->list_lock);
-
 		update_fw_images_tree();
 
-		/*
-		 * Removing non-valid image directories at the end of an
-		 * activation.
-		 * We can't remove the sysfs attributes while in the respective
-		 * _store() handler, so have to postpone the list removal to a
-		 * workqueue.
-		 */
-		queue_work(fw_images_update_wq, &fw_images_update_work);
-
 		return 0;
 	}
 
@@ -640,6 +616,7 @@ static int update_fw_images_tree(void)
 {
 	struct arm_smccc_1_2_regs reg = { 0 }, res;
 	struct uuid_regs image_uuid;
+	struct kobject *kobj;
 	char image_id_str[40];
 	int ret, num_of_components;
 
@@ -649,6 +626,19 @@ static int update_fw_images_tree(void)
 		return -ENODEV;
 	}
 
+	/*
+	 * Invalidate fw_seq_ids (-1) for all images as the seq_ids and the
+	 * number of firmware images in the LFA agent may change after a
+	 * successful activation attempt. Negate all image flags as well.
+	 */
+	spin_lock(&lfa_kset->list_lock);
+	list_for_each_entry(kobj, &lfa_kset->list, entry) {
+		struct fw_image *image = kobj_to_fw_image(kobj);
+
+		set_image_flags(image, -1, 0b1000, 0, 0);
+	}
+	spin_unlock(&lfa_kset->list_lock);
+
 	reg.a0 = LFA_1_0_FN_GET_INVENTORY;
 	for (int i = 0; i < num_of_components; i++) {
 		reg.a1 = i; /* fw_seq_id to be queried */
@@ -666,6 +656,14 @@ static int update_fw_images_tree(void)
 		}
 	}
 
+	/*
+	 * Removing non-valid image directories at the end of an activation.
+	 * We can't remove the sysfs attributes while in the respective
+	 * _store() handler, so have to postpone the list removal to a
+	 * workqueue.
+	 */
+	queue_work(fw_images_update_wq, &fw_images_update_work);
+
 	return 0;
 }
 
-- 
2.43.0