From c650ca7b4c160193791dc7a52381c71c6a29e871 Mon Sep 17 00:00:00 2001 From: Jagannadha Sutradharudu Teki Date: Mon, 27 Apr 2015 21:04:15 +0530 Subject: [PATCH] sf: Fix to compute proper sector_size 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 Reported-by: Bin Meng Tested-by: Bin Meng --- drivers/mtd/spi/sf_internal.h | 3 ++- drivers/mtd/spi/sf_probe.c | 3 +++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h index bd834dc263..4158e13322 100644 --- a/drivers/mtd/spi/sf_internal.h +++ b/drivers/mtd/spi/sf_internal.h @@ -119,7 +119,8 @@ int sst_write_bp(struct spi_flash *flash, u32 offset, size_t len, * @name: Device name ([MANUFLETTER][DEVTYPE][DENSITY][EXTRAINFO]) * @jedec: Device jedec ID (0x[1byte_manuf_id][2byte_dev_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 * @e_rd_cmd: Enum list for read commands * @flags: Important param, for flash specific behaviour diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c index d8b9fcaeae..201471c392 100644 --- a/drivers/mtd/spi/sf_probe.c +++ b/drivers/mtd/spi/sf_probe.c @@ -187,6 +187,9 @@ static int spi_flash_validate_params(struct spi_slave *spi, u8 *idcode, 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 */ cmd = fls(params->e_rd_cmd & flash->spi->op_mode_rx); if (cmd) { -- 2.25.1