diff options
Diffstat (limited to 'drivers/mtd/mtdconcat.c')
| -rw-r--r-- | drivers/mtd/mtdconcat.c | 53 |
1 files changed, 21 insertions, 32 deletions
diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c index cbc5925e6440..170a7221b35f 100644 --- a/drivers/mtd/mtdconcat.c +++ b/drivers/mtd/mtdconcat.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * MTD device concatenation layer * @@ -5,21 +6,6 @@ * Copyright © 2002-2010 David Woodhouse <dwmw2@infradead.org> * * NAND support by Christian Gan <cgan@iders.ca> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - * */ #include <linux/kernel.h> @@ -451,7 +437,8 @@ static int concat_erase(struct mtd_info *mtd, struct erase_info *instr) return err; } -static int concat_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) +static int concat_xxlock(struct mtd_info *mtd, loff_t ofs, uint64_t len, + bool is_lock) { struct mtd_concat *concat = CONCAT(mtd); int i, err = -EINVAL; @@ -470,7 +457,10 @@ static int concat_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) else size = len; - err = mtd_lock(subdev, ofs, size); + if (is_lock) + err = mtd_lock(subdev, ofs, size); + else + err = mtd_unlock(subdev, ofs, size); if (err) break; @@ -485,35 +475,33 @@ static int concat_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) return err; } +static int concat_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) +{ + return concat_xxlock(mtd, ofs, len, true); +} + static int concat_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) { + return concat_xxlock(mtd, ofs, len, false); +} + +static int concat_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len) +{ struct mtd_concat *concat = CONCAT(mtd); - int i, err = 0; + int i, err = -EINVAL; for (i = 0; i < concat->num_subdev; i++) { struct mtd_info *subdev = concat->subdev[i]; - uint64_t size; if (ofs >= subdev->size) { - size = 0; ofs -= subdev->size; continue; } - if (ofs + len > subdev->size) - size = subdev->size - ofs; - else - size = len; - - err = mtd_unlock(subdev, ofs, size); - if (err) - break; - len -= size; - if (len == 0) + if (ofs + len > subdev->size) break; - err = -EINVAL; - ofs = 0; + return mtd_is_locked(subdev, ofs, len); } return err; @@ -718,6 +706,7 @@ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[], /* subdevices to c concat->mtd._sync = concat_sync; concat->mtd._lock = concat_lock; concat->mtd._unlock = concat_unlock; + concat->mtd._is_locked = concat_is_locked; concat->mtd._suspend = concat_suspend; concat->mtd._resume = concat_resume; |