diff options
Diffstat (limited to 'target/linux/generic/pending-5.4/495-mtd-core-add-get_mtd_device_by_node.patch')
| -rw-r--r-- | target/linux/generic/pending-5.4/495-mtd-core-add-get_mtd_device_by_node.patch | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/target/linux/generic/pending-5.4/495-mtd-core-add-get_mtd_device_by_node.patch b/target/linux/generic/pending-5.4/495-mtd-core-add-get_mtd_device_by_node.patch deleted file mode 100644 index a173381820..0000000000 --- a/target/linux/generic/pending-5.4/495-mtd-core-add-get_mtd_device_by_node.patch +++ /dev/null @@ -1,75 +0,0 @@ -From 1bd1b740f208d1cf4071932cc51860d37266c402 Mon Sep 17 00:00:00 2001 -From: Bernhard Frauendienst <kernel@nospam.obeliks.de> -Date: Sat, 1 Sep 2018 00:30:11 +0200 -Subject: [PATCH 495/497] mtd: core: add get_mtd_device_by_node - -Add function to retrieve a mtd device by its OF node. Since drivers can -assign arbitrary names to mtd devices in the absence of a label -property, there is no other reliable way to retrieve a mtd device for a -given OF node. - -Signed-off-by: Bernhard Frauendienst <kernel@nospam.obeliks.de> -Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com> ---- - drivers/mtd/mtdcore.c | 38 ++++++++++++++++++++++++++++++++++++++ - include/linux/mtd/mtd.h | 2 ++ - 2 files changed, 40 insertions(+) - ---- a/drivers/mtd/mtdcore.c -+++ b/drivers/mtd/mtdcore.c -@@ -1053,6 +1053,44 @@ out_unlock: - } - EXPORT_SYMBOL_GPL(get_mtd_device_nm); - -+/** -+ * get_mtd_device_by_node - obtain a validated handle for an MTD device -+ * by of_node -+ * @of_node: OF node of MTD device to open -+ * -+ * This function returns MTD device description structure in case of -+ * success and an error code in case of failure. -+ */ -+struct mtd_info *get_mtd_device_by_node(const struct device_node *of_node) -+{ -+ int err = -ENODEV; -+ struct mtd_info *mtd = NULL, *other; -+ -+ mutex_lock(&mtd_table_mutex); -+ -+ mtd_for_each_device(other) { -+ if (of_node == other->dev.of_node) { -+ mtd = other; -+ break; -+ } -+ } -+ -+ if (!mtd) -+ goto out_unlock; -+ -+ err = __get_mtd_device(mtd); -+ if (err) -+ goto out_unlock; -+ -+ mutex_unlock(&mtd_table_mutex); -+ return mtd; -+ -+out_unlock: -+ mutex_unlock(&mtd_table_mutex); -+ return ERR_PTR(err); -+} -+EXPORT_SYMBOL_GPL(get_mtd_device_by_node); -+ - void put_mtd_device(struct mtd_info *mtd) - { - mutex_lock(&mtd_table_mutex); ---- a/include/linux/mtd/mtd.h -+++ b/include/linux/mtd/mtd.h -@@ -586,6 +586,8 @@ extern struct mtd_info *get_mtd_device(s - extern int __get_mtd_device(struct mtd_info *mtd); - extern void __put_mtd_device(struct mtd_info *mtd); - extern struct mtd_info *get_mtd_device_nm(const char *name); -+extern struct mtd_info *get_mtd_device_by_node( -+ const struct device_node *of_node); - extern void put_mtd_device(struct mtd_info *mtd); - - |