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d337731f85
Automatically refreshed: ath79/patches-5.10/0032-MIPS-ath79-sanitize-symbols.patch bcm63xx/patches-5.10/322-MIPS-BCM63XX-switch-to-IRQ_DOMAIN.patch bcm63xx/patches-5.10/434-nand-brcmnand-fix-OOB-R-W-with-Hamming-ECC.patch bmips/patches-5.10/001-v5.11-mips-bmips-select-ARCH_HAS_RESET_CONTROLLER.patch bmips/patches-5.10/041-v5.13-mtd-rawnand-brcmnand-fix-OOB-R-W-with-Hamming-ECC.patch bmips/patches-5.10/202-mips-bmips-disable-ARCH_HAS_SYNC_DMA_FOR_CPU_ALL.patch bmips/patches-5.10/600-mips-bmips-add-pci-support.patch generic/backport-5.10/103-v5.13-MIPS-select-CPU_MIPS64-for-remaining-MIPS64-CPUs.patch generic/hack-5.10/301-mips_image_cmdline_hack.patch generic/hack-5.10/402-mtd-blktrans-call-add-disks-after-mtd-device.patch generic/hack-5.10/902-debloat_proc.patch generic/pending-5.10/300-mips_expose_boot_raw.patch generic/pending-5.10/495-mtd-core-add-get_mtd_device_by_node.patch generic/pending-5.10/630-packet_socket_type.patch ipq806x/patches-5.10/0072-add-ipq806x-with-no-clocks.patch ipq806x/patches-5.10/099-1-mtd-nand-raw-qcom_nandc-add-boot_layout_mode-support.patch lantiq/patches-5.10/0001-MIPS-lantiq-add-pcie-driver.patch lantiq/patches-5.10/0023-NET-PHY-add-led-support-for-intel-xway.patch lantiq/patches-5.10/0152-lantiq-VPE.patch Deleted (reverse-appliable): bmips/patches-5.10/052-v5.13-gpio-guard-gpiochip_irqchip_add_domain-with-GPIOLIB_.patch generic/backport-5.10/499-v5.13-mtd-don-t-lock-when-recursively-deleting-partitions.patch Deleted (alternative upstream fix): ramips/patches-5.10/330-fix-pci-init-mt7620.patch Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
76 lines
2.2 KiB
Diff
76 lines
2.2 KiB
Diff
From 1bd1b740f208d1cf4071932cc51860d37266c402 Mon Sep 17 00:00:00 2001
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From: Bernhard Frauendienst <kernel@nospam.obeliks.de>
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Date: Sat, 1 Sep 2018 00:30:11 +0200
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Subject: [PATCH 495/497] mtd: core: add get_mtd_device_by_node
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Add function to retrieve a mtd device by its OF node. Since drivers can
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assign arbitrary names to mtd devices in the absence of a label
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property, there is no other reliable way to retrieve a mtd device for a
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given OF node.
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Signed-off-by: Bernhard Frauendienst <kernel@nospam.obeliks.de>
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Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
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---
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drivers/mtd/mtdcore.c | 38 ++++++++++++++++++++++++++++++++++++++
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include/linux/mtd/mtd.h | 2 ++
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2 files changed, 40 insertions(+)
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--- a/drivers/mtd/mtdcore.c
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+++ b/drivers/mtd/mtdcore.c
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@@ -1046,6 +1046,44 @@ out_unlock:
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}
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EXPORT_SYMBOL_GPL(get_mtd_device_nm);
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+/**
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+ * get_mtd_device_by_node - obtain a validated handle for an MTD device
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+ * by of_node
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+ * @of_node: OF node of MTD device to open
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+ *
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+ * This function returns MTD device description structure in case of
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+ * success and an error code in case of failure.
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+ */
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+struct mtd_info *get_mtd_device_by_node(const struct device_node *of_node)
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+{
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+ int err = -ENODEV;
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+ struct mtd_info *mtd = NULL, *other;
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+
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+ mutex_lock(&mtd_table_mutex);
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+
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+ mtd_for_each_device(other) {
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+ if (of_node == other->dev.of_node) {
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+ mtd = other;
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+ break;
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+ }
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+ }
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+
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+ if (!mtd)
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+ goto out_unlock;
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+
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+ err = __get_mtd_device(mtd);
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+ if (err)
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+ goto out_unlock;
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+
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+ mutex_unlock(&mtd_table_mutex);
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+ return mtd;
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+
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+out_unlock:
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+ mutex_unlock(&mtd_table_mutex);
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+ return ERR_PTR(err);
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+}
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+EXPORT_SYMBOL_GPL(get_mtd_device_by_node);
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+
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void put_mtd_device(struct mtd_info *mtd)
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{
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mutex_lock(&mtd_table_mutex);
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--- a/include/linux/mtd/mtd.h
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+++ b/include/linux/mtd/mtd.h
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@@ -696,6 +696,8 @@ extern struct mtd_info *get_mtd_device(s
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extern int __get_mtd_device(struct mtd_info *mtd);
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extern void __put_mtd_device(struct mtd_info *mtd);
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extern struct mtd_info *get_mtd_device_nm(const char *name);
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+extern struct mtd_info *get_mtd_device_by_node(
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+ const struct device_node *of_node);
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extern void put_mtd_device(struct mtd_info *mtd);
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static inline uint64_t mtdpart_get_offset(const struct mtd_info *mtd)
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