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authorLinus Torvalds <torvalds@linux-foundation.org>2021-08-16 18:36:01 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2021-08-16 18:36:01 +0200
commita2824f19e6065a0d3735acd9fe7155b104e7edf5 (patch)
tree3f514882017d26da13cda226cb3f94eba6f26f04 /drivers/mtd
parentMerge tag 'trace-v5.14-rc5-2' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff)
parentmtd: rawnand: Fix probe failure due to of_get_nand_secure_regions() (diff)
downloadlinux-a2824f19e6065a0d3735acd9fe7155b104e7edf5.tar.xz
linux-a2824f19e6065a0d3735acd9fe7155b104e7edf5.zip
Merge tag 'mtd/fixes-for-5.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux
Pull MTD fixes from Miquel Raynal: "MTD core fixes: - Fix lock hierarchy in deregister_mtd_blktrans - Handle flashes without OTP gracefully - Break circular locks in register_mtd_blktrans MTD device fixes: - mchp48l640: - Fix memory leak on cmd - Silence some uninitialized variable warnings - blkdevs: - Initialize rq.limits.discard_granularity CFI fixes: - Fix crash when erasing/writing AMD cards Raw NAND fixes: - Fix of_get_nand_secure_regions(): - Add a missing check - Avoid an unwanted probe failure when a DT property is missing" * tag 'mtd/fixes-for-5.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux: mtd: rawnand: Fix probe failure due to of_get_nand_secure_regions() mtd: fix lock hierarchy in deregister_mtd_blktrans mtd: devices: mchp48l640: Fix memory leak on cmd mtd: cfi_cmdset_0002: fix crash when erasing/writing AMD cards mtd: core: handle flashes without OTP gracefully mtd: mchp48l640: silence some uninitialized variable warnings mtd: break circular locks in register_mtd_blktrans mtd: rawnand: Add a check in of_get_nand_secure_regions() mtd: mtd_blkdevs: Initialize rq.limits.discard_granularity
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0002.c2
-rw-r--r--drivers/mtd/devices/mchp48l640.c5
-rw-r--r--drivers/mtd/mtd_blkdevs.c11
-rw-r--r--drivers/mtd/mtdcore.c4
-rw-r--r--drivers/mtd/nand/raw/nand_base.c10
5 files changed, 19 insertions, 13 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index 3097e93787f7..a761134fd3be 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -119,7 +119,7 @@ static int cfi_use_status_reg(struct cfi_private *cfi)
struct cfi_pri_amdstd *extp = cfi->cmdset_priv;
u8 poll_mask = CFI_POLL_STATUS_REG | CFI_POLL_DQ;
- return extp->MinorVersion >= '5' &&
+ return extp && extp->MinorVersion >= '5' &&
(extp->SoftwareFeatures & poll_mask) == CFI_POLL_STATUS_REG;
}
diff --git a/drivers/mtd/devices/mchp48l640.c b/drivers/mtd/devices/mchp48l640.c
index efc2003bd13a..99400d0fb8c1 100644
--- a/drivers/mtd/devices/mchp48l640.c
+++ b/drivers/mtd/devices/mchp48l640.c
@@ -229,7 +229,7 @@ static int mchp48l640_write(struct mtd_info *mtd, loff_t to, size_t len,
woff += ws;
}
- return ret;
+ return 0;
}
static int mchp48l640_read_page(struct mtd_info *mtd, loff_t from, size_t len,
@@ -255,6 +255,7 @@ static int mchp48l640_read_page(struct mtd_info *mtd, loff_t from, size_t len,
if (!ret)
*retlen += len;
+ kfree(cmd);
return ret;
fail:
@@ -286,7 +287,7 @@ static int mchp48l640_read(struct mtd_info *mtd, loff_t from, size_t len,
woff += ws;
}
- return ret;
+ return 0;
};
static const struct mchp48_caps mchp48l640_caps = {
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 6ce4bc57f919..44bea3f65060 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -419,6 +419,7 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new)
if (tr->discard) {
blk_queue_flag_set(QUEUE_FLAG_DISCARD, new->rq);
blk_queue_max_discard_sectors(new->rq, UINT_MAX);
+ new->rq->limits.discard_granularity = tr->blksize;
}
gd->queue = new->rq;
@@ -525,14 +526,10 @@ int register_mtd_blktrans(struct mtd_blktrans_ops *tr)
if (!blktrans_notifier.list.next)
register_mtd_user(&blktrans_notifier);
-
- mutex_lock(&mtd_table_mutex);
-
ret = register_blkdev(tr->major, tr->name);
if (ret < 0) {
printk(KERN_WARNING "Unable to register %s block device on major %d: %d\n",
tr->name, tr->major, ret);
- mutex_unlock(&mtd_table_mutex);
return ret;
}
@@ -542,12 +539,12 @@ int register_mtd_blktrans(struct mtd_blktrans_ops *tr)
tr->blkshift = ffs(tr->blksize) - 1;
INIT_LIST_HEAD(&tr->devs);
- list_add(&tr->list, &blktrans_majors);
+ mutex_lock(&mtd_table_mutex);
+ list_add(&tr->list, &blktrans_majors);
mtd_for_each_device(mtd)
if (mtd->type != MTD_ABSENT)
tr->add_mtd(tr, mtd);
-
mutex_unlock(&mtd_table_mutex);
return 0;
}
@@ -564,8 +561,8 @@ int deregister_mtd_blktrans(struct mtd_blktrans_ops *tr)
list_for_each_entry_safe(dev, next, &tr->devs, list)
tr->remove_dev(dev);
- unregister_blkdev(tr->major, tr->name);
mutex_unlock(&mtd_table_mutex);
+ unregister_blkdev(tr->major, tr->name);
BUG_ON(!list_empty(&tr->devs));
return 0;
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index b5ccd3037788..c8fd7f758938 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -806,7 +806,9 @@ static ssize_t mtd_otp_size(struct mtd_info *mtd, bool is_user)
err:
kfree(info);
- return ret;
+
+ /* ENODATA means there is no OTP region. */
+ return ret == -ENODATA ? 0 : ret;
}
static struct nvmem_device *mtd_otp_nvmem_register(struct mtd_info *mtd,
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 57a583149cc0..3d6c6e880520 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -5228,12 +5228,18 @@ static bool of_get_nand_on_flash_bbt(struct device_node *np)
static int of_get_nand_secure_regions(struct nand_chip *chip)
{
struct device_node *dn = nand_get_flash_node(chip);
+ struct property *prop;
int nr_elem, i, j;
- nr_elem = of_property_count_elems_of_size(dn, "secure-regions", sizeof(u64));
- if (!nr_elem)
+ /* Only proceed if the "secure-regions" property is present in DT */
+ prop = of_find_property(dn, "secure-regions", NULL);
+ if (!prop)
return 0;
+ nr_elem = of_property_count_elems_of_size(dn, "secure-regions", sizeof(u64));
+ if (nr_elem <= 0)
+ return nr_elem;
+
chip->nr_secure_regions = nr_elem / 2;
chip->secure_regions = kcalloc(chip->nr_secure_regions, sizeof(*chip->secure_regions),
GFP_KERNEL);