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Diffstat (limited to 'drivers/mtd/spi-nor/swp.c')
-rw-r--r--drivers/mtd/spi-nor/swp.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/mtd/spi-nor/swp.c b/drivers/mtd/spi-nor/swp.c
index 5ab9d53248..585813310e 100644
--- a/drivers/mtd/spi-nor/swp.c
+++ b/drivers/mtd/spi-nor/swp.c
@@ -34,17 +34,22 @@ static u8 spi_nor_get_sr_tb_mask(struct spi_nor *nor)
static u64 spi_nor_get_min_prot_length_sr(struct spi_nor *nor)
{
unsigned int bp_slots, bp_slots_needed;
+ /*
+ * sector_size will eventually be replaced with the max erase size of
+ * the flash. For now, we need to have that ugly default.
+ */
+ unsigned int sector_size = nor->info->sector_size ?: SPI_NOR_DEFAULT_SECTOR_SIZE;
+ u64 n_sectors = div_u64(nor->params->size, sector_size);
u8 mask = spi_nor_get_sr_bp_mask(nor);
/* Reserved one for "protect none" and one for "protect all". */
bp_slots = (1 << hweight8(mask)) - 2;
- bp_slots_needed = ilog2(nor->info->n_sectors);
+ bp_slots_needed = ilog2(n_sectors);
if (bp_slots_needed > bp_slots)
- return nor->info->sector_size <<
- (bp_slots_needed - bp_slots);
+ return sector_size << (bp_slots_needed - bp_slots);
else
- return nor->info->sector_size;
+ return sector_size;
}
static void spi_nor_get_locked_range_sr(struct spi_nor *nor, u8 sr, loff_t *ofs,