be381a7ac7
Deleted (upstreamed): generic/backport-5.15/350-v5.18-MIPS-pgalloc-fix-memory-leak-caused-by-pgd_free.patch [1] generic/backport-5.15/730-v5.16-hv-utils-add-PTP_1588_CLOCK-to-Kconfig-to-fix-build.patch [2] generic/pending-5.15/850-0014-PCI-aardvark-Fix-reading-PCI_EXP_RTSTA_PME-bit-on-em.patch [3] generic/pending-5.15/850-0002-PCI-aardvark-Fix-reading-MSI-interrupt-number.patch [4] Manually rebased: generic/pending-5.15/850-0002-PCI-aardvark-Fix-reading-MSI-interrupt-number.patch ramips/patches-5.15/710-at803x.patch [1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.33&id=d29cda15cab086d82d692de016f7249545d4b6b4 [2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.33&id=d5aad7d63b1b5c1f3c4b69e12c05e7c7d196fae8 [3] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.33&id=ed750e22e44366e264bcdf7b1cf0713f08f7980a [4] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.33&id=0fe94b84c43cfea867e1721606185e8686d7d32f Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com> [Refresh patches again] [Remove generic/pending-5.15/850-0002-PCI-aardvark-Fix-reading-MSI-interrupt-number.patch] Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
98 lines
2.5 KiB
Diff
98 lines
2.5 KiB
Diff
From: Daniel Golle <daniel@makrotopia.org>
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Subject: ubi: auto-attach mtd device named "ubi" or "data" on boot
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Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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---
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drivers/mtd/ubi/build.c | 36 ++++++++++++++++++++++++++++++++++++
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1 file changed, 36 insertions(+)
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--- a/drivers/mtd/ubi/build.c
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+++ b/drivers/mtd/ubi/build.c
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@@ -1184,6 +1184,73 @@ static struct mtd_info * __init open_mtd
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return mtd;
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}
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+/*
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+ * This function tries attaching mtd partitions named either "ubi" or "data"
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+ * during boot.
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+ */
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+static void __init ubi_auto_attach(void)
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+{
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+ int err;
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+ struct mtd_info *mtd;
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+ loff_t offset = 0;
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+ size_t len;
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+ char magic[4];
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+
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+ /* try attaching mtd device named "ubi" or "data" */
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+ mtd = open_mtd_device("ubi");
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+ if (IS_ERR(mtd))
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+ mtd = open_mtd_device("data");
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+
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+ if (IS_ERR(mtd))
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+ return;
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+
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+ /* get the first not bad block */
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+ if (mtd_can_have_bb(mtd))
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+ while (mtd_block_isbad(mtd, offset)) {
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+ offset += mtd->erasesize;
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+
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+ if (offset > mtd->size) {
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+ pr_err("UBI error: Failed to find a non-bad "
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+ "block on mtd%d\n", mtd->index);
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+ goto cleanup;
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+ }
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+ }
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+
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+ /* check if the read from flash was successful */
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+ err = mtd_read(mtd, offset, 4, &len, (void *) magic);
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+ if ((err && !mtd_is_bitflip(err)) || len != 4) {
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+ pr_err("UBI error: unable to read from mtd%d\n", mtd->index);
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+ goto cleanup;
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+ }
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+
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+ /* check for a valid ubi magic */
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+ if (strncmp(magic, "UBI#", 4)) {
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+ pr_err("UBI error: no valid UBI magic found inside mtd%d\n", mtd->index);
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+ goto cleanup;
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+ }
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+
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+ /* don't auto-add media types where UBI doesn't makes sense */
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+ if (mtd->type != MTD_NANDFLASH &&
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+ mtd->type != MTD_NORFLASH &&
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+ mtd->type != MTD_DATAFLASH &&
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+ mtd->type != MTD_MLCNANDFLASH)
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+ goto cleanup;
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+
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+ mutex_lock(&ubi_devices_mutex);
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+ pr_notice("UBI: auto-attach mtd%d\n", mtd->index);
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+ err = ubi_attach_mtd_dev(mtd, UBI_DEV_NUM_AUTO, 0, 0);
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+ mutex_unlock(&ubi_devices_mutex);
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+ if (err < 0) {
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+ pr_err("UBI error: cannot attach mtd%d\n", mtd->index);
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+ goto cleanup;
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+ }
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+
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+ return;
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+
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+cleanup:
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+ put_mtd_device(mtd);
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+}
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+
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static int __init ubi_init(void)
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{
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int err, i, k;
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@@ -1267,6 +1334,12 @@ static int __init ubi_init(void)
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}
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}
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+ /* auto-attach mtd devices only if built-in to the kernel and no ubi.mtd
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+ * parameter was given */
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+ if (IS_ENABLED(CONFIG_MTD_ROOTFS_ROOT_DEV) &&
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+ !ubi_is_module() && !mtd_devs)
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+ ubi_auto_attach();
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+
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err = ubiblock_init();
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if (err) {
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pr_err("UBI error: block: cannot initialize, error %d\n", err);
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