diff options
Diffstat (limited to 'drivers/mtd/devices/mtd_dataflash.c')
| -rw-r--r-- | drivers/mtd/devices/mtd_dataflash.c | 33 |
1 files changed, 16 insertions, 17 deletions
diff --git a/drivers/mtd/devices/mtd_dataflash.c b/drivers/mtd/devices/mtd_dataflash.c index 0e8cbfeba11..dd22ce2cc9a 100644 --- a/drivers/mtd/devices/mtd_dataflash.c +++ b/drivers/mtd/devices/mtd_dataflash.c @@ -10,7 +10,6 @@ * 2 of the License, or (at your option) any later version. */ #include <linux/module.h> -#include <linux/init.h> #include <linux/slab.h> #include <linux/delay.h> #include <linux/device.h> @@ -88,8 +87,6 @@ struct dataflash { uint8_t command[4]; char name[24]; - unsigned partitioned:1; - unsigned short page_offset; /* offset in flash address */ unsigned int page_size; /* of bytes per page */ @@ -442,8 +439,8 @@ static int dataflash_write(struct mtd_info *mtd, loff_t to, size_t len, #ifdef CONFIG_MTD_DATAFLASH_OTP -static int dataflash_get_otp_info(struct mtd_info *mtd, - struct otp_info *info, size_t len) +static int dataflash_get_otp_info(struct mtd_info *mtd, size_t len, + size_t *retlen, struct otp_info *info) { /* Report both blocks as identical: bytes 0..64, locked. * Unless the user block changed from all-ones, we can't @@ -452,7 +449,8 @@ static int dataflash_get_otp_info(struct mtd_info *mtd, info->start = 0; info->length = 64; info->locked = 1; - return sizeof(*info); + *retlen = sizeof(*info); + return 0; } static ssize_t otp_read(struct spi_device *spi, unsigned base, @@ -544,14 +542,18 @@ static int dataflash_write_user_otp(struct mtd_info *mtd, struct dataflash *priv = mtd->priv; int status; - if (len > 64) - return -EINVAL; + if (from >= 64) { + /* + * Attempting to write beyond the end of OTP memory, + * no data can be written. + */ + *retlen = 0; + return 0; + } - /* Strictly speaking, we *could* truncate the write ... but - * let's not do that for the only write that's ever possible. - */ + /* Truncate the write to fit into OTP memory. */ if ((from + len) > 64) - return -EINVAL; + len = 64 - from; /* OUT: OP_WRITE_SECURITY, 3 zeroes, 64 data-or-zero bytes * IN: ignore all @@ -671,7 +673,6 @@ static int add_dataflash_otp(struct spi_device *spi, char *name, int nr_pages, if (!err) return 0; - spi_set_drvdata(spi, NULL); kfree(priv); return err; } @@ -881,7 +882,7 @@ static int dataflash_probe(struct spi_device *spi) break; /* obsolete AT45DB1282 not (yet?) supported */ default: - pr_debug("%s: unsupported device (%x)\n", dev_name(&spi->dev), + dev_info(&spi->dev, "unsupported device (%x)\n", status & 0x3c); status = -ENODEV; } @@ -901,10 +902,8 @@ static int dataflash_remove(struct spi_device *spi) pr_debug("%s: remove\n", dev_name(&spi->dev)); status = mtd_device_unregister(&flash->mtd); - if (status == 0) { - spi_set_drvdata(spi, NULL); + if (status == 0) kfree(flash); - } return status; } |