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156427b312
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Sascha Hauer 156427b312 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 08:59:45 +02:00
arch arm64: mm: Don't invalidate FROM_DEVICE buffers at start of DMA transfer 2022-06-25 15:16:09 +02:00
block block: Fix handling of offline queues in blk_mq_alloc_request_hctx() 2022-06-22 14:13:17 +02:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2022-06-22 14:13:17 +02:00
crypto crypto: memneq - move into lib/ 2022-06-22 14:13:18 +02:00
Documentation x86/speculation/mmio: Add sysfs reporting for Processor MMIO Stale Data 2022-06-16 13:27:59 +02:00
drivers mtd: rawnand: gpmi: Fix setting busy timeout setting 2022-06-29 08:59:45 +02:00
fs btrfs: add error messages to all unrecognized mount options 2022-06-29 08:59:45 +02:00
include random: quiet urandom warning ratelimit suppression message 2022-06-29 08:59:44 +02:00
init Kconfig: Add option for asm goto w/ tied outputs to workaround clang-13 bug 2022-06-09 10:21:25 +02:00
ipc ipc/mqueue: use get_tree_nodev() in mqueue_get_tree() 2022-06-09 10:21:17 +02:00
kernel dma-direct: don't over-decrypt memory 2022-06-22 14:13:20 +02:00
lib crypto: memneq - move into lib/ 2022-06-22 14:13:18 +02:00
LICENSES LICENSES/deprecated: add Zlib license text 2020-09-16 14:33:49 +02:00
mm hugetlb: fix huge_pmd_unshare address update 2022-06-09 10:21:27 +02:00
net net: openvswitch: fix parsing of nw_proto for IPv6 fragments 2022-06-29 08:59:45 +02:00
samples samples/bpf, xdpsock: Fix race when running for fix duration of time 2022-04-08 14:40:21 +02:00
scripts faddr2line: Fix overlapping text section failures, the sequel 2022-06-22 14:13:17 +02:00
security ima: remove the IMA_TEMPLATE Kconfig option 2022-06-09 10:21:25 +02:00
sound ALSA: hda/realtek: Add quirk for Clevo NS50PU 2022-06-29 08:59:45 +02:00
tools net/sched: act_police: more accurate MTU policing 2022-06-22 14:13:20 +02:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2022-02-01 17:25:48 +01:00
virt KVM: Prevent module exit until all VMs are freed 2022-04-08 14:40:38 +02:00
.clang-format RDMA 5.10 pull request 2020-10-17 11:18:18 -07:00
.cocciconfig
.get_maintainer.ignore
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore kbuild: generate Module.symvers only when vmlinux exists 2021-05-19 10:12:59 +02:00
.mailmap mailmap: add two more addresses of Uwe Kleine-König 2020-12-06 10:19:07 -08:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Jason Cooper to CREDITS 2020-11-30 10:20:34 +01:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: add git tree for random.c 2022-05-30 09:33:24 +02:00
Makefile Linux 5.10.126 2022-06-27 09:41:01 +02:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.