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-rw-r--r--drivers/mtd/chips/cfi_cmdset_0001.c33
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0002.c9
-rw-r--r--drivers/mtd/chips/jedec_probe.c2
-rw-r--r--drivers/mtd/mtdchar.c4
-rw-r--r--drivers/mtd/nand/brcmnand/brcmnand.c2
-rw-r--r--drivers/mtd/nand/fsl_ifc_nand.c39
-rw-r--r--drivers/mtd/nand/gpmi-nand/gpmi-nand.c16
-rw-r--r--drivers/mtd/nand/nand_base.c14
-rw-r--r--drivers/mtd/tests/oobtest.c21
-rw-r--r--drivers/mtd/ubi/block.c2
-rw-r--r--drivers/mtd/ubi/build.c11
-rw-r--r--drivers/mtd/ubi/fastmap-wl.c1
-rw-r--r--drivers/mtd/ubi/fastmap.c33
-rw-r--r--drivers/mtd/ubi/vmt.c15
14 files changed, 152 insertions, 50 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index 5e1b68cbcd0a..e1b603ca0170 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -45,6 +45,7 @@
#define I82802AB 0x00ad
#define I82802AC 0x00ac
#define PF38F4476 0x881c
+#define M28F00AP30 0x8963
/* STMicroelectronics chips */
#define M50LPW080 0x002F
#define M50FLW080A 0x0080
@@ -375,6 +376,17 @@ static void cfi_fixup_major_minor(struct cfi_private *cfi,
extp->MinorVersion = '1';
}
+static int cfi_is_micron_28F00AP30(struct cfi_private *cfi, struct flchip *chip)
+{
+ /*
+ * Micron(was Numonyx) 1Gbit bottom boot are buggy w.r.t
+ * Erase Supend for their small Erase Blocks(0x8000)
+ */
+ if (cfi->mfr == CFI_MFR_INTEL && cfi->id == M28F00AP30)
+ return 1;
+ return 0;
+}
+
static inline struct cfi_pri_intelext *
read_pri_intelext(struct map_info *map, __u16 adr)
{
@@ -831,21 +843,30 @@ static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long
(mode == FL_WRITING && (cfip->SuspendCmdSupport & 1))))
goto sleep;
+ /* Do not allow suspend iff read/write to EB address */
+ if ((adr & chip->in_progress_block_mask) ==
+ chip->in_progress_block_addr)
+ goto sleep;
+
+ /* do not suspend small EBs, buggy Micron Chips */
+ if (cfi_is_micron_28F00AP30(cfi, chip) &&
+ (chip->in_progress_block_mask == ~(0x8000-1)))
+ goto sleep;
/* Erase suspend */
- map_write(map, CMD(0xB0), adr);
+ map_write(map, CMD(0xB0), chip->in_progress_block_addr);
/* If the flash has finished erasing, then 'erase suspend'
* appears to make some (28F320) flash devices switch to
* 'read' mode. Make sure that we switch to 'read status'
* mode so we get the right data. --rmk
*/
- map_write(map, CMD(0x70), adr);
+ map_write(map, CMD(0x70), chip->in_progress_block_addr);
chip->oldstate = FL_ERASING;
chip->state = FL_ERASE_SUSPENDING;
chip->erase_suspended = 1;
for (;;) {
- status = map_read(map, adr);
+ status = map_read(map, chip->in_progress_block_addr);
if (map_word_andequal(map, status, status_OK, status_OK))
break;
@@ -1041,8 +1062,8 @@ static void put_chip(struct map_info *map, struct flchip *chip, unsigned long ad
sending the 0x70 (Read Status) command to an erasing
chip and expecting it to be ignored, that's what we
do. */
- map_write(map, CMD(0xd0), adr);
- map_write(map, CMD(0x70), adr);
+ map_write(map, CMD(0xd0), chip->in_progress_block_addr);
+ map_write(map, CMD(0x70), chip->in_progress_block_addr);
chip->oldstate = FL_READY;
chip->state = FL_ERASING;
break;
@@ -1933,6 +1954,8 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
map_write(map, CMD(0xD0), adr);
chip->state = FL_ERASING;
chip->erase_suspended = 0;
+ chip->in_progress_block_addr = adr;
+ chip->in_progress_block_mask = ~(len - 1);
ret = INVAL_CACHE_AND_WAIT(map, chip, adr,
adr, len,
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index 9dca881bb378..107c05b3ddbb 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -812,9 +812,10 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr
(mode == FL_WRITING && (cfip->EraseSuspend & 0x2))))
goto sleep;
- /* We could check to see if we're trying to access the sector
- * that is currently being erased. However, no user will try
- * anything like that so we just wait for the timeout. */
+ /* Do not allow suspend iff read/write to EB address */
+ if ((adr & chip->in_progress_block_mask) ==
+ chip->in_progress_block_addr)
+ goto sleep;
/* Erase suspend */
/* It's harmless to issue the Erase-Suspend and Erase-Resume
@@ -2263,6 +2264,7 @@ static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip)
chip->state = FL_ERASING;
chip->erase_suspended = 0;
chip->in_progress_block_addr = adr;
+ chip->in_progress_block_mask = ~(map->size - 1);
INVALIDATE_CACHE_UDELAY(map, chip,
adr, map->size,
@@ -2352,6 +2354,7 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
chip->state = FL_ERASING;
chip->erase_suspended = 0;
chip->in_progress_block_addr = adr;
+ chip->in_progress_block_mask = ~(len - 1);
INVALIDATE_CACHE_UDELAY(map, chip,
adr, len,
diff --git a/drivers/mtd/chips/jedec_probe.c b/drivers/mtd/chips/jedec_probe.c
index 7c0b27d132b1..b479bd81120b 100644
--- a/drivers/mtd/chips/jedec_probe.c
+++ b/drivers/mtd/chips/jedec_probe.c
@@ -1889,6 +1889,8 @@ static inline u32 jedec_read_mfr(struct map_info *map, uint32_t base,
do {
uint32_t ofs = cfi_build_cmd_addr(0 + (bank << 8), map, cfi);
mask = (1 << (cfi->device_type * 8)) - 1;
+ if (ofs >= map->size)
+ return 0;
result = map_read(map, base + ofs);
bank++;
} while ((result.x[0] & mask) == CFI_MFR_CONTINUATION);
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 2a47a3f0e730..b4092eab53ac 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -487,7 +487,7 @@ static int shrink_ecclayout(struct mtd_info *mtd,
for (i = 0; i < MTD_MAX_ECCPOS_ENTRIES;) {
u32 eccpos;
- ret = mtd_ooblayout_ecc(mtd, section, &oobregion);
+ ret = mtd_ooblayout_ecc(mtd, section++, &oobregion);
if (ret < 0) {
if (ret != -ERANGE)
return ret;
@@ -534,7 +534,7 @@ static int get_oobinfo(struct mtd_info *mtd, struct nand_oobinfo *to)
for (i = 0; i < ARRAY_SIZE(to->eccpos);) {
u32 eccpos;
- ret = mtd_ooblayout_ecc(mtd, section, &oobregion);
+ ret = mtd_ooblayout_ecc(mtd, section++, &oobregion);
if (ret < 0) {
if (ret != -ERANGE)
return ret;
diff --git a/drivers/mtd/nand/brcmnand/brcmnand.c b/drivers/mtd/nand/brcmnand/brcmnand.c
index 1a4a790054e4..ef9a6b22c9fa 100644
--- a/drivers/mtd/nand/brcmnand/brcmnand.c
+++ b/drivers/mtd/nand/brcmnand/brcmnand.c
@@ -1763,7 +1763,7 @@ try_dmaread:
err = brcmstb_nand_verify_erased_page(mtd, chip, buf,
addr);
/* erased page bitflips corrected */
- if (err > 0)
+ if (err >= 0)
return err;
}
diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c
index d1570f512f0b..2f6b55229d5b 100644
--- a/drivers/mtd/nand/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/fsl_ifc_nand.c
@@ -201,14 +201,9 @@ static int is_blank(struct mtd_info *mtd, unsigned int bufnum)
/* returns nonzero if entire page is blank */
static int check_read_ecc(struct mtd_info *mtd, struct fsl_ifc_ctrl *ctrl,
- u32 *eccstat, unsigned int bufnum)
+ u32 eccstat, unsigned int bufnum)
{
- u32 reg = eccstat[bufnum / 4];
- int errors;
-
- errors = (reg >> ((3 - bufnum % 4) * 8)) & 15;
-
- return errors;
+ return (eccstat >> ((3 - bufnum % 4) * 8)) & 15;
}
/*
@@ -221,7 +216,7 @@ static void fsl_ifc_run_command(struct mtd_info *mtd)
struct fsl_ifc_ctrl *ctrl = priv->ctrl;
struct fsl_ifc_nand_ctrl *nctrl = ifc_nand_ctrl;
struct fsl_ifc_runtime __iomem *ifc = ctrl->rregs;
- u32 eccstat[4];
+ u32 eccstat;
int i;
/* set the chip select for NAND Transaction */
@@ -256,19 +251,17 @@ static void fsl_ifc_run_command(struct mtd_info *mtd)
if (nctrl->eccread) {
int errors;
int bufnum = nctrl->page & priv->bufnum_mask;
- int sector = bufnum * chip->ecc.steps;
- int sector_end = sector + chip->ecc.steps - 1;
+ int sector_start = bufnum * chip->ecc.steps;
+ int sector_end = sector_start + chip->ecc.steps - 1;
__be32 *eccstat_regs;
- if (ctrl->version >= FSL_IFC_VERSION_2_0_0)
- eccstat_regs = ifc->ifc_nand.v2_nand_eccstat;
- else
- eccstat_regs = ifc->ifc_nand.v1_nand_eccstat;
+ eccstat_regs = ifc->ifc_nand.nand_eccstat;
+ eccstat = ifc_in32(&eccstat_regs[sector_start / 4]);
- for (i = sector / 4; i <= sector_end / 4; i++)
- eccstat[i] = ifc_in32(&eccstat_regs[i]);
+ for (i = sector_start; i <= sector_end; i++) {
+ if (i != sector_start && !(i % 4))
+ eccstat = ifc_in32(&eccstat_regs[i / 4]);
- for (i = sector; i <= sector_end; i++) {
errors = check_read_ecc(mtd, ctrl, eccstat, i);
if (errors == 15) {
@@ -656,6 +649,7 @@ static int fsl_ifc_wait(struct mtd_info *mtd, struct nand_chip *chip)
struct fsl_ifc_ctrl *ctrl = priv->ctrl;
struct fsl_ifc_runtime __iomem *ifc = ctrl->rregs;
u32 nand_fsr;
+ int status;
/* Use READ_STATUS command, but wait for the device to be ready */
ifc_out32((IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) |
@@ -670,12 +664,12 @@ static int fsl_ifc_wait(struct mtd_info *mtd, struct nand_chip *chip)
fsl_ifc_run_command(mtd);
nand_fsr = ifc_in32(&ifc->ifc_nand.nand_fsr);
-
+ status = nand_fsr >> 24;
/*
* The chip always seems to report that it is
* write-protected, even when it is not.
*/
- return nand_fsr | NAND_STATUS_WP;
+ return status | NAND_STATUS_WP;
}
static int fsl_ifc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
@@ -907,6 +901,13 @@ static int fsl_ifc_chip_init(struct fsl_ifc_mtd *priv)
if (ctrl->version == FSL_IFC_VERSION_1_1_0)
fsl_ifc_sram_init(priv);
+ /*
+ * As IFC version 2.0.0 has 16KB of internal SRAM as compared to older
+ * versions which had 8KB. Hence bufnum mask needs to be updated.
+ */
+ if (ctrl->version >= FSL_IFC_VERSION_2_0_0)
+ priv->bufnum_mask = (priv->bufnum_mask * 2) + 1;
+
return 0;
}
diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
index 6c062b8251d2..d9dab4275859 100644
--- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
@@ -1059,9 +1059,6 @@ static int gpmi_ecc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
return ret;
}
- /* handle the block mark swapping */
- block_mark_swapping(this, payload_virt, auxiliary_virt);
-
/* Loop over status bytes, accumulating ECC status. */
status = auxiliary_virt + nfc_geo->auxiliary_status_offset;
@@ -1150,6 +1147,9 @@ static int gpmi_ecc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
max_bitflips = max_t(unsigned int, max_bitflips, *status);
}
+ /* handle the block mark swapping */
+ block_mark_swapping(this, buf, auxiliary_virt);
+
if (oob_required) {
/*
* It's time to deliver the OOB bytes. See gpmi_ecc_read_oob()
@@ -2047,18 +2047,20 @@ static int gpmi_nand_init(struct gpmi_nand_data *this)
ret = nand_boot_init(this);
if (ret)
- goto err_out;
+ goto err_nand_cleanup;
ret = chip->scan_bbt(mtd);
if (ret)
- goto err_out;
+ goto err_nand_cleanup;
ret = mtd_device_register(mtd, NULL, 0);
if (ret)
- goto err_out;
+ goto err_nand_cleanup;
return 0;
+err_nand_cleanup:
+ nand_cleanup(chip);
err_out:
- gpmi_nand_exit(this);
+ gpmi_free_dma_buffer(this);
return ret;
}
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 21c03086bb7f..5fb45161789c 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -715,7 +715,8 @@ static void nand_command(struct mtd_info *mtd, unsigned int command,
chip->cmd_ctrl(mtd, readcmd, ctrl);
ctrl &= ~NAND_CTRL_CHANGE;
}
- chip->cmd_ctrl(mtd, command, ctrl);
+ if (command != NAND_CMD_NONE)
+ chip->cmd_ctrl(mtd, command, ctrl);
/* Address cycle, when necessary */
ctrl = NAND_CTRL_ALE | NAND_CTRL_CHANGE;
@@ -744,6 +745,7 @@ static void nand_command(struct mtd_info *mtd, unsigned int command,
*/
switch (command) {
+ case NAND_CMD_NONE:
case NAND_CMD_PAGEPROG:
case NAND_CMD_ERASE1:
case NAND_CMD_ERASE2:
@@ -806,7 +808,9 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command,
}
/* Command latch cycle */
- chip->cmd_ctrl(mtd, command, NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
+ if (command != NAND_CMD_NONE)
+ chip->cmd_ctrl(mtd, command,
+ NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
if (column != -1 || page_addr != -1) {
int ctrl = NAND_CTRL_CHANGE | NAND_NCE | NAND_ALE;
@@ -842,6 +846,7 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command,
*/
switch (command) {
+ case NAND_CMD_NONE:
case NAND_CMD_CACHEDPROG:
case NAND_CMD_PAGEPROG:
case NAND_CMD_ERASE1:
@@ -4780,6 +4785,11 @@ int nand_scan_tail(struct mtd_info *mtd)
goto err_free;
}
ecc->total = ecc->steps * ecc->bytes;
+ if (ecc->total > mtd->oobsize) {
+ WARN(1, "Total number of ECC bytes exceeded oobsize\n");
+ ret = -EINVAL;
+ goto err_free;
+ }
/*
* The number of bytes available for a client to place data into
diff --git a/drivers/mtd/tests/oobtest.c b/drivers/mtd/tests/oobtest.c
index 1cb3f7758fb6..766b2c385682 100644
--- a/drivers/mtd/tests/oobtest.c
+++ b/drivers/mtd/tests/oobtest.c
@@ -193,6 +193,9 @@ static int verify_eraseblock(int ebnum)
ops.datbuf = NULL;
ops.oobbuf = readbuf;
err = mtd_read_oob(mtd, addr, &ops);
+ if (mtd_is_bitflip(err))
+ err = 0;
+
if (err || ops.oobretlen != use_len) {
pr_err("error: readoob failed at %#llx\n",
(long long)addr);
@@ -227,6 +230,9 @@ static int verify_eraseblock(int ebnum)
ops.datbuf = NULL;
ops.oobbuf = readbuf;
err = mtd_read_oob(mtd, addr, &ops);
+ if (mtd_is_bitflip(err))
+ err = 0;
+
if (err || ops.oobretlen != mtd->oobavail) {
pr_err("error: readoob failed at %#llx\n",
(long long)addr);
@@ -286,6 +292,9 @@ static int verify_eraseblock_in_one_go(int ebnum)
/* read entire block's OOB at one go */
err = mtd_read_oob(mtd, addr, &ops);
+ if (mtd_is_bitflip(err))
+ err = 0;
+
if (err || ops.oobretlen != len) {
pr_err("error: readoob failed at %#llx\n",
(long long)addr);
@@ -527,6 +536,9 @@ static int __init mtd_oobtest_init(void)
pr_info("attempting to start read past end of OOB\n");
pr_info("an error is expected...\n");
err = mtd_read_oob(mtd, addr0, &ops);
+ if (mtd_is_bitflip(err))
+ err = 0;
+
if (err) {
pr_info("error occurred as expected\n");
err = 0;
@@ -571,6 +583,9 @@ static int __init mtd_oobtest_init(void)
pr_info("attempting to read past end of device\n");
pr_info("an error is expected...\n");
err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops);
+ if (mtd_is_bitflip(err))
+ err = 0;
+
if (err) {
pr_info("error occurred as expected\n");
err = 0;
@@ -615,6 +630,9 @@ static int __init mtd_oobtest_init(void)
pr_info("attempting to read past end of device\n");
pr_info("an error is expected...\n");
err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops);
+ if (mtd_is_bitflip(err))
+ err = 0;
+
if (err) {
pr_info("error occurred as expected\n");
err = 0;
@@ -684,6 +702,9 @@ static int __init mtd_oobtest_init(void)
ops.datbuf = NULL;
ops.oobbuf = readbuf;
err = mtd_read_oob(mtd, addr, &ops);
+ if (mtd_is_bitflip(err))
+ err = 0;
+
if (err)
goto out;
if (memcmpshow(addr, readbuf, writebuf,
diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c
index 46913ef25bc0..479a5f02d10b 100644
--- a/drivers/mtd/ubi/block.c
+++ b/drivers/mtd/ubi/block.c
@@ -244,7 +244,7 @@ static int ubiblock_open(struct block_device *bdev, fmode_t mode)
* in any case.
*/
if (mode & FMODE_WRITE) {
- ret = -EPERM;
+ ret = -EROFS;
goto out_unlock;
}
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 85d54f37e28f..6cb5ca52cb5a 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -894,6 +894,17 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
return -EINVAL;
}
+ /*
+ * Both UBI and UBIFS have been designed for SLC NAND and NOR flashes.
+ * MLC NAND is different and needs special care, otherwise UBI or UBIFS
+ * will die soon and you will lose all your data.
+ */
+ if (mtd->type == MTD_MLCNANDFLASH) {
+ pr_err("ubi: refuse attaching mtd%d - MLC NAND is not supported\n",
+ mtd->index);
+ return -EINVAL;
+ }
+
if (ubi_num == UBI_DEV_NUM_AUTO) {
/* Search for an empty slot in the @ubi_devices array */
for (ubi_num = 0; ubi_num < UBI_MAX_DEVICES; ubi_num++)
diff --git a/drivers/mtd/ubi/fastmap-wl.c b/drivers/mtd/ubi/fastmap-wl.c
index 4f0bd6b4422a..69dd21679a30 100644
--- a/drivers/mtd/ubi/fastmap-wl.c
+++ b/drivers/mtd/ubi/fastmap-wl.c
@@ -362,7 +362,6 @@ static void ubi_fastmap_close(struct ubi_device *ubi)
{
int i;
- flush_work(&ubi->fm_work);
return_unused_pool_pebs(ubi, &ubi->fm_pool);
return_unused_pool_pebs(ubi, &ubi->fm_wl_pool);
diff --git a/drivers/mtd/ubi/fastmap.c b/drivers/mtd/ubi/fastmap.c
index c1f5c29e458e..b44c8d348e78 100644
--- a/drivers/mtd/ubi/fastmap.c
+++ b/drivers/mtd/ubi/fastmap.c
@@ -828,6 +828,24 @@ static int find_fm_anchor(struct ubi_attach_info *ai)
return ret;
}
+static struct ubi_ainf_peb *clone_aeb(struct ubi_attach_info *ai,
+ struct ubi_ainf_peb *old)
+{
+ struct ubi_ainf_peb *new;
+
+ new = ubi_alloc_aeb(ai, old->pnum, old->ec);
+ if (!new)
+ return NULL;
+
+ new->vol_id = old->vol_id;
+ new->sqnum = old->sqnum;
+ new->lnum = old->lnum;
+ new->scrub = old->scrub;
+ new->copy_flag = old->copy_flag;
+
+ return new;
+}
+
/**
* ubi_scan_fastmap - scan the fastmap.
* @ubi: UBI device object
@@ -847,7 +865,7 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
struct ubi_vid_hdr *vh;
struct ubi_ec_hdr *ech;
struct ubi_fastmap_layout *fm;
- struct ubi_ainf_peb *tmp_aeb, *aeb;
+ struct ubi_ainf_peb *aeb;
int i, used_blocks, pnum, fm_anchor, ret = 0;
size_t fm_size;
__be32 crc, tmp_crc;
@@ -857,9 +875,16 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
if (fm_anchor < 0)
return UBI_NO_FASTMAP;
- /* Move all (possible) fastmap blocks into our new attach structure. */
- list_for_each_entry_safe(aeb, tmp_aeb, &scan_ai->fastmap, u.list)
- list_move_tail(&aeb->u.list, &ai->fastmap);
+ /* Copy all (possible) fastmap blocks into our new attach structure. */
+ list_for_each_entry(aeb, &scan_ai->fastmap, u.list) {
+ struct ubi_ainf_peb *new;
+
+ new = clone_aeb(ai, aeb);
+ if (!new)
+ return -ENOMEM;
+
+ list_add(&new->u.list, &ai->fastmap);
+ }
down_write(&ubi->fm_protect);
memset(ubi->fm_buf, 0, ubi->fm_size);
diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c
index 7ac78c13dd1c..1bcb25bc35ef 100644
--- a/drivers/mtd/ubi/vmt.c
+++ b/drivers/mtd/ubi/vmt.c
@@ -265,6 +265,12 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
vol->last_eb_bytes = vol->usable_leb_size;
}
+ /* Make volume "available" before it becomes accessible via sysfs */
+ spin_lock(&ubi->volumes_lock);
+ ubi->volumes[vol_id] = vol;
+ ubi->vol_count += 1;
+ spin_unlock(&ubi->volumes_lock);
+
/* Register character device for the volume */
cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
vol->cdev.owner = THIS_MODULE;
@@ -304,11 +310,6 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
if (err)
goto out_sysfs;
- spin_lock(&ubi->volumes_lock);
- ubi->volumes[vol_id] = vol;
- ubi->vol_count += 1;
- spin_unlock(&ubi->volumes_lock);
-
ubi_volume_notify(ubi, vol, UBI_VOLUME_ADDED);
self_check_volumes(ubi);
return err;
@@ -328,6 +329,10 @@ out_sysfs:
out_cdev:
cdev_del(&vol->cdev);
out_mapping:
+ spin_lock(&ubi->volumes_lock);
+ ubi->volumes[vol_id] = NULL;
+ ubi->vol_count -= 1;
+ spin_unlock(&ubi->volumes_lock);
if (do_free)
ubi_eba_destroy_table(eba_tbl);
out_acc:
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-28 09:00:01 +0000