WSL2-Linux-Kernel/drivers/mtd
Sascha Hauer 0af674e7a7 mtd: rawnand: gpmi: Fix setting busy timeout setting
commit 06781a5026 upstream.

The DEVICE_BUSY_TIMEOUT value is described in the Reference Manual as:

| Timeout waiting for NAND Ready/Busy or ATA IRQ. Used in WAIT_FOR_READY
| mode. This value is the number of GPMI_CLK cycles multiplied by 4096.

So instead of multiplying the value in cycles with 4096, we have to
divide it by that value. Use DIV_ROUND_UP to make sure we are on the
safe side, especially when the calculated value in cycles is smaller
than 4096 as typically the case.

This bug likely never triggered because any timeout != 0 usually will
do. In my case the busy timeout in cycles was originally calculated as
2408, which multiplied with 4096 is 0x968000. The lower 16 bits were
taken for the 16 bit wide register field, so the register value was
0x8000. With 2970bf5a32 ("mtd: rawnand: gpmi: fix controller timings
setting") however the value in cycles became 2384, which multiplied
with 4096 is 0x950000. The lower 16 bit are 0x0 now resulting in an
intermediate timeout when reading from NAND.

Fixes: b120612206 ("mtd: rawnand: gpmi: use core timings instead of an empirical derivation")
Cc: stable@vger.kernel.org
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220614083138.3455683-1-s.hauer@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-06-29 09:03:20 +02:00
..
chips mtd: cfi_cmdset_0002: Use chip_ready() for write on S29GL064N 2022-06-09 10:23:25 +02:00
devices mtd: mchp48l640: Add SPI ID table 2022-04-08 14:23:29 +02:00
hyperbus mtd: hyperbus: rpc-if: fix bug in rpcif_hb_remove 2022-01-27 11:03:15 +01:00
lpddr
maps mtd: fixup CFI on ixp4xx 2022-01-20 09:13:16 +01:00
nand mtd: rawnand: gpmi: Fix setting busy timeout setting 2022-06-29 09:03:20 +02:00
parsers mtd: parsers: qcom: Fix missing free for pparts in cleanup 2022-02-23 12:03:16 +01:00
spi-nor mtd: spi-nor: core: Check written SR value in spi_nor_write_16bit_sr_and_check() 2022-06-09 10:22:51 +02:00
tests mtd: tests: Remove redundant assignment to err 2021-05-10 12:48:35 +02:00
ubi ubi: ubi_create_volume: Fix use-after-free when volume creation failed 2022-06-14 18:36:10 +02:00
Kconfig mtdblock: Add comment about UBI block devices 2021-08-06 22:05:13 +02:00
Makefile
ftl.c mtd/ftl: don't cast away the type when calling add_mtd_blktrans_dev 2021-08-23 10:01:04 +02:00
inftlcore.c mtd: inftlcore: Use module_mtd_blktrans to register driver 2021-03-11 09:37:48 +01:00
inftlmount.c mtd: inftl: remove unnecessary oom message 2021-06-11 20:44:21 +02:00
mtd_blkdevs.c MTD changes: 2021-09-05 10:50:12 -07:00
mtdblock.c mtdblock: warn if opened on NAND 2022-06-09 10:22:49 +02:00
mtdblock_ro.c mtdblock: Warn if added for a NAND device 2021-08-17 18:41:59 +02:00
mtdchar.c mtd: add OTP (one-time-programmable) erase ioctl 2021-03-28 19:24:54 +02:00
mtdconcat.c mtd: mtdconcat: Check _read, _write callbacks existence before assignment 2021-08-17 18:43:33 +02:00
mtdcore.c mtd: core: Fix a conflict between MTD and NVMEM on wp-gpios property 2022-03-02 11:48:07 +01:00
mtdcore.h
mtdoops.c mtd: mtdoops: remove unnecessary oom message 2021-06-11 20:43:46 +02:00
mtdpart.c mtd: Fixed breaking list in __mtd_del_partition. 2022-01-27 11:02:48 +01:00
mtdpstore.c pstore/blk: Include zone in pstore_device_info 2021-06-16 21:09:31 -07:00
mtdsuper.c
mtdswap.c mtd: mtdswap: Use module_mtd_blktrans to register driver 2021-03-11 09:37:48 +01:00
nftlcore.c mtd: nftlcore: remove set but rewrite variables 2021-05-10 12:11:46 +02:00
nftlmount.c mtd: nftl: remove unnecessary oom message 2021-06-11 20:43:26 +02:00
rfd_ftl.c mtd/rfd_ftl: don't cast away the type when calling add_mtd_blktrans_dev 2021-08-23 10:01:06 +02:00
sm_ftl.c drivers: mtd: sm_ftl: Fix alignment of block comment 2021-05-10 12:49:00 +02:00
sm_ftl.h
ssfdc.c