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sf: Fix to compute proper sector_size

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Upto now flash sector_size is assigned from params which isn't
necessarily a sector size from vendor, so based on the SECT_*
flags from flash_params the erase_size will compute and it will
become the sector_size finally.

Bug report (from Bin Meng):
=> sf probe
SF: Detected SST25VF016B with page size 256 Bytes, erase size 4 KiB,
total 2 MiB, mapped at ffe00000

=> sf erase 0 +100
SF: 65536 bytes @ 0x0 Erased: OK

Signed-off-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
Reported-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Jagannadha Sutradharudu Teki 2015-04-27 21:04:15 +05:30
parent 074eed5146
commit c650ca7b4c
2 changed files with 5 additions and 1 deletions
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3
drivers/mtd/spi/sf_internal.h
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@ -119,7 +119,8 @@ int sst_write_bp(struct spi_flash *flash, u32 offset, size_t len,
* @name: Device name ([MANUFLETTER][DEVTYPE][DENSITY][EXTRAINFO]) * @name: Device name ([MANUFLETTER][DEVTYPE][DENSITY][EXTRAINFO])
* @jedec: Device jedec ID (0x[1byte_manuf_id][2byte_dev_id]) * @jedec: Device jedec ID (0x[1byte_manuf_id][2byte_dev_id])
* @ext_jedec: Device ext_jedec ID * @ext_jedec: Device ext_jedec ID
* @sector_size: Sector size of this device * @sector_size: Isn't necessarily a sector size from vendor,
* the size listed here is what works with CMD_ERASE_64K
* @nr_sectors: No.of sectors on this device * @nr_sectors: No.of sectors on this device
* @e_rd_cmd: Enum list for read commands * @e_rd_cmd: Enum list for read commands
* @flags: Important param, for flash specific behaviour * @flags: Important param, for flash specific behaviour

3
drivers/mtd/spi/sf_probe.c
View file

@ -187,6 +187,9 @@ static int spi_flash_validate_params(struct spi_slave *spi, u8 *idcode,
flash->erase_size = flash->sector_size; flash->erase_size = flash->sector_size;
} }
/* Now erase size becomes valid sector size */
flash->sector_size = flash->erase_size;
/* Look for the fastest read cmd */ /* Look for the fastest read cmd */
cmd = fls(params->e_rd_cmd & flash->spi->op_mode_rx); cmd = fls(params->e_rd_cmd & flash->spi->op_mode_rx);
if (cmd) { if (cmd) {