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a1383655cf
Tested on bcm2710 (Raspberry Pi 3B). Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
115 lines
3.3 KiB
Diff
115 lines
3.3 KiB
Diff
From acb49b81500dd9d65027587767db25ead0b457af Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Thu, 14 Jun 2018 15:07:26 +0100
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Subject: [PATCH] of: configfs: Use of_overlay_fdt_apply API call
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The published API to the dynamic overlay application mechanism now
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takes a Flattened Device Tree blob as input so that it can manage the
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lifetime of the unflattened tree. Conveniently, the new API call -
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of_overlay_fdt_apply - is virtually a drop-in replacement for
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create_overlay, which can now be deleted.
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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drivers/of/configfs.c | 47 +++++++------------------------------------
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1 file changed, 7 insertions(+), 40 deletions(-)
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--- a/drivers/of/configfs.c
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+++ b/drivers/of/configfs.c
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@@ -40,41 +40,6 @@ struct cfs_overlay_item {
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int dtbo_size;
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};
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-static int create_overlay(struct cfs_overlay_item *overlay, void *blob)
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-{
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- int err;
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-
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- /* unflatten the tree */
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- of_fdt_unflatten_tree(blob, NULL, &overlay->overlay);
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- if (overlay->overlay == NULL) {
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- pr_err("%s: failed to unflatten tree\n", __func__);
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- err = -EINVAL;
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- goto out_err;
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- }
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- pr_debug("%s: unflattened OK\n", __func__);
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-
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- /* mark it as detached */
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- of_node_set_flag(overlay->overlay, OF_DETACHED);
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-
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- /* perform resolution */
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- err = of_resolve_phandles(overlay->overlay);
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- if (err != 0) {
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- pr_err("%s: Failed to resolve tree\n", __func__);
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- goto out_err;
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- }
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- pr_debug("%s: resolved OK\n", __func__);
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-
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- err = of_overlay_apply(overlay->overlay, &overlay->ov_id);
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- if (err < 0) {
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- pr_err("%s: Failed to create overlay (err=%d)\n",
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- __func__, err);
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- goto out_err;
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- }
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-
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-out_err:
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- return err;
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-}
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-
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static inline struct cfs_overlay_item *to_cfs_overlay_item(
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struct config_item *item)
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{
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@@ -115,7 +80,8 @@ static ssize_t cfs_overlay_item_path_sto
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if (err != 0)
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goto out_err;
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- err = create_overlay(overlay, (void *)overlay->fw->data);
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+ err = of_overlay_fdt_apply((void *)overlay->fw->data,
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+ (u32)overlay->fw->size, &overlay->ov_id);
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if (err != 0)
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goto out_err;
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@@ -136,7 +102,7 @@ static ssize_t cfs_overlay_item_status_s
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struct cfs_overlay_item *overlay = to_cfs_overlay_item(item);
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return sprintf(page, "%s\n",
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- overlay->ov_id >= 0 ? "applied" : "unapplied");
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+ overlay->ov_id > 0 ? "applied" : "unapplied");
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}
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CONFIGFS_ATTR(cfs_overlay_item_, path);
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@@ -188,7 +154,8 @@ ssize_t cfs_overlay_item_dtbo_write(stru
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overlay->dtbo_size = count;
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- err = create_overlay(overlay, overlay->dtbo);
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+ err = of_overlay_fdt_apply(overlay->dtbo, overlay->dtbo_size,
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+ &overlay->ov_id);
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if (err != 0)
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goto out_err;
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@@ -198,6 +165,7 @@ out_err:
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kfree(overlay->dtbo);
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overlay->dtbo = NULL;
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overlay->dtbo_size = 0;
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+ overlay->ov_id = 0;
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return err;
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}
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@@ -213,7 +181,7 @@ static void cfs_overlay_release(struct c
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{
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struct cfs_overlay_item *overlay = to_cfs_overlay_item(item);
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- if (overlay->ov_id >= 0)
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+ if (overlay->ov_id > 0)
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of_overlay_remove(&overlay->ov_id);
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if (overlay->fw)
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release_firmware(overlay->fw);
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@@ -241,7 +209,6 @@ static struct config_item *cfs_overlay_g
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overlay = kzalloc(sizeof(*overlay), GFP_KERNEL);
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if (!overlay)
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return ERR_PTR(-ENOMEM);
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- overlay->ov_id = -1;
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config_item_init_type_name(&overlay->item, name, &cfs_overlay_type);
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return &overlay->item;
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