mtd: nand: make Samsung SLC NAND usable again

Upstream linux commit 69fc01296c9281

commit a1286a1fc416 ("mtd: nand: Move Samsung specific init/detection
logic in nand_samsung.c") introduced a regression for Samsung SLC NAND
chips. Prior to this commit chip->bits_per_cell was initialized by calling
nand_get_bits_per_cell() before using nand_is_slc().
With the offending commit this call is skipped, leaving
chip->bits_per_cell cleared to zero when the manufacturer specific
'.detect' function calls nand_is_slc() which in turn interprets
bits_per_cell != 1 as indication for an MLC chip.
The effect is that e.g. a K9F1G08U0F NAND chip is falsely detected as
MLC NAND with 4KiB page size rather than SLC with 2KiB page size.

Add a call to nand_get_bits_per_cell() before calling the .detect hook
function in nand_manufacturer_detect(), so that the nand_is_slc()
calls in the manufacturer specific code will return correct results.

Reported-by: Marcin Gołaś <[email protected]>
Signed-off-by: Michael Trimarchi <[email protected]>
Reviewed-by: Dario Binacchi <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Dario Binacchi <[email protected]>

0 files changed, 0 insertions, 0 deletions