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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>
99 lines
2.8 KiB
Diff
99 lines
2.8 KiB
Diff
From 0bccc3722bdd88e8ae995e77ef9f7b77ee4cbdee Mon Sep 17 00:00:00 2001
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From: Daniel Golle <daniel@makrotopia.org>
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Date: Wed, 7 Apr 2021 22:45:54 +0100
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Subject: [PATCH 2/2] mtd: blktrans: call add disks after mtd device
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To: linux-mtd@lists.infradead.org
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Cc: Vignesh Raghavendra <vigneshr@ti.com>,
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Richard Weinberger <richard@nod.at>,
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Miquel Raynal <miquel.raynal@bootlin.com>,
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David Woodhouse <dwmw2@infradead.org>
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Calling device_add_disk while holding mtd_table_mutex leads
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to deadlock in case part_bits!=0 as block partition parsers
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will try to open the newly created disks, trying to acquire
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mutex once again.
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Move device_add_disk to additional function called after
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add partitions of an MTD device have been added and locks
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have been released.
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Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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---
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drivers/mtd/mtd_blkdevs.c | 33 ++++++++++++++++++++++++++-------
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drivers/mtd/mtdcore.c | 3 +++
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include/linux/mtd/blktrans.h | 1 +
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3 files changed, 30 insertions(+), 7 deletions(-)
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--- a/drivers/mtd/mtd_blkdevs.c
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+++ b/drivers/mtd/mtd_blkdevs.c
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@@ -457,13 +457,6 @@ int add_mtd_blktrans_dev(struct mtd_blkt
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if (new->readonly)
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set_disk_ro(gd, 1);
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- device_add_disk(&new->mtd->dev, gd, NULL);
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-
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- if (new->disk_attributes) {
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- ret = sysfs_create_group(&disk_to_dev(gd)->kobj,
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- new->disk_attributes);
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- WARN_ON(ret);
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- }
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return 0;
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error4:
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kfree(new->tag_set);
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@@ -475,6 +468,27 @@ error1:
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return ret;
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}
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+void register_mtd_blktrans_devs(void)
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+{
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+ struct mtd_blktrans_ops *tr;
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+ struct mtd_blktrans_dev *dev, *next;
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+ int ret;
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+
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+ list_for_each_entry(tr, &blktrans_majors, list) {
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+ list_for_each_entry_safe(dev, next, &tr->devs, list) {
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+ if (dev->disk->flags & GENHD_FL_UP)
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+ continue;
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+
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+ device_add_disk(&dev->mtd->dev, dev->disk, NULL);
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+ if (dev->disk_attributes) {
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+ ret = sysfs_create_group(&disk_to_dev(dev->disk)->kobj,
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+ dev->disk_attributes);
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+ WARN_ON(ret);
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+ }
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+ }
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+ }
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+}
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+
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int del_mtd_blktrans_dev(struct mtd_blktrans_dev *old)
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{
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unsigned long flags;
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--- a/drivers/mtd/mtdcore.c
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+++ b/drivers/mtd/mtdcore.c
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@@ -31,6 +31,7 @@
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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+#include <linux/mtd/blktrans.h>
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#include "mtdcore.h"
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@@ -851,6 +852,8 @@ int mtd_device_parse_register(struct mtd
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register_reboot_notifier(&mtd->reboot_notifier);
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}
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+ register_mtd_blktrans_devs();
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+
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out:
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if (ret && device_is_registered(&mtd->dev))
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del_mtd_device(mtd);
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--- a/include/linux/mtd/blktrans.h
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+++ b/include/linux/mtd/blktrans.h
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@@ -76,6 +76,6 @@ extern int deregister_mtd_blktrans(struc
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extern int add_mtd_blktrans_dev(struct mtd_blktrans_dev *dev);
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extern int del_mtd_blktrans_dev(struct mtd_blktrans_dev *dev);
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extern int mtd_blktrans_cease_background(struct mtd_blktrans_dev *dev);
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-
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+extern void register_mtd_blktrans_devs(void);
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#endif /* __MTD_TRANS_H__ */
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