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Joakim Zhang 15ef207218 can: flexcan: add correctable errors correction when HW supports ECC 
commit cdce844865 ("can: flexcan: add vf610 support for FlexCAN")
From above commit by Stefan Agner, the patch just disables
non-correctable errors interrupt and freeze mode. It still can correct
the correctable errors since ECC enabled by default after reset (MECR[ECCDIS]=0,
enable memory error correct) if HW supports ECC.

commit 5e269324db ("can: flexcan: disable completely the ECC mechanism")
From above commit by Joakim Zhang, the patch disables ECC completely (assert
MECR[ECCDIS]) according to the explanation of FLEXCAN_QUIRK_DISABLE_MECR that
disable memory error detection. This cause correctable errors cannot be
corrected even HW supports ECC.

The error correction mechanism ensures that in this 13-bit word, errors
in one bit can be corrected (correctable errors) and errors in two bits can
be detected but not corrected (non-correctable errors). Errors in more than
two bits may not be detected.

If HW supports ECC, we can use this to correct the correctable errors detected
from FlexCAN memory. Then disable non-correctable errors interrupt and freeze
mode to avoid that put FlexCAN in freeze mode.

This patch adds correctable errors correction when HW supports ECC, and
modify explanation for FLEXCAN_QUIRK_DISABLE_MECR.

Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Link: https://lore.kernel.org/r/20200416093126.15242-1-qiangqing.zhang@nxp.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
 		2020-09-22 16:50:02 +02:00
Documentation linux-can-next-for-5.10-20200921 2020-09-21 14:57:05 -07:00
LICENSES LICENSES: Rename other to deprecated 2019-05-03 06:34:32 -06:00
arch s390/cio: Helper functions to read CSSID, IID, and CHID 2020-09-15 13:21:46 -07:00
block block-5.9-2020-09-04 2020-09-04 13:04:51 -07:00
certs .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2020-08-30 15:53:44 -07:00
drivers can: flexcan: add correctable errors correction when HW supports ECC 2020-09-22 16:50:02 +02:00
fs Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-09-04 21:28:59 -07:00
include net: phy: bcm7xxx: Add an entry for BCM72113 2020-09-21 17:16:17 -07:00
init Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-09-04 21:28:59 -07:00
ipc treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
kernel Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-09-04 21:28:59 -07:00
lib Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-09-04 21:28:59 -07:00
mm Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-09-04 21:28:59 -07:00
net linux-can-next-for-5.10-20200921 2020-09-21 14:57:05 -07:00
samples Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-09-04 21:28:59 -07:00
scripts Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-09-04 21:28:59 -07:00
security Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-09-04 21:28:59 -07:00
sound sound fixes for 5.9-rc4 2020-09-04 12:05:25 -07:00
tools selftests: Set default protocol for raw sockets in nettest 2020-09-17 17:07:15 -07:00
usr Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-08-07 13:29:39 -07:00
virt * PAE and PKU bugfixes for x86 2020-08-22 10:03:05 -07:00
.clang-format block: add bio_for_each_bvec_all() 2020-05-25 11:25:24 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: Add ZSTD-compressed files 2020-07-31 11:50:49 +02:00
.mailmap Merge branch 'akpm' (patches from Andrew) 2020-08-21 14:44:48 -07:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Add Krzysztof Kozlowski to Samsung S3FWRN5 and remove Robert 2020-09-10 15:22:16 -07:00
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 reviewer entry for microchip mcp25xxfd SPI-CAN network driver 2020-09-21 10:13:20 +02:00
Makefile Linux 5.9-rc3 2020-08-30 16:01:54 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.