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Nicolas Saenz Julienne 19ec6bb802 mmc: sdhci-iproc: fix spurious interrupts on Multiblock reads with bcm2711 
The Raspberry Pi 4 SDHCI hardware seems to automatically issue CMD12
after multiblock reads even when ACMD12 is disabled. This triggers
spurious interrupts after the data transfer is done with the following
message:

  mmc1: Got data interrupt 0x00000002 even though no data operation was in progress.
  mmc1: sdhci: ============ SDHCI REGISTER DUMP ===========
  mmc1: sdhci: Sys addr:  0x00000000 | Version:  0x00001002
  mmc1: sdhci: Blk size:  0x00007200 | Blk cnt:  0x00000000
  mmc1: sdhci: Argument:  0x00000000 | Trn mode: 0x00000033
  mmc1: sdhci: Present:   0x1fff0000 | Host ctl: 0x00000017
  mmc1: sdhci: Power:     0x0000000f | Blk gap:  0x00000080
  mmc1: sdhci: Wake-up:   0x00000000 | Clock:    0x00000107
  mmc1: sdhci: Timeout:   0x00000000 | Int stat: 0x00000000
  mmc1: sdhci: Int enab:  0x03ff100b | Sig enab: 0x03ff100b
  mmc1: sdhci: ACmd stat: 0x00000000 | Slot int: 0x00000000
  mmc1: sdhci: Caps:      0x45ee6432 | Caps_1:   0x0000a525
  mmc1: sdhci: Cmd:       0x00000c1a | Max curr: 0x00080008
  mmc1: sdhci: Resp[0]:   0x00000b00 | Resp[1]:  0x00edc87f
  mmc1: sdhci: Resp[2]:   0x325b5900 | Resp[3]:  0x00400e00
  mmc1: sdhci: Host ctl2: 0x00000001
  mmc1: sdhci: ADMA Err:  0x00000000 | ADMA Ptr: 0xf3025208
  mmc1: sdhci: ============================================

Enable SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12 to enable ACMD12 on multiblock
reads and suppress the spurious interrupts.

Fixes: f84e411c85 ("mmc: sdhci-iproc: Add support for emmc2 of the BCM2711")
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Tested-by: Matthias Brugger <mbrugger@suse.com>
Acked-by: Stefan Wahren <wahrenst@gmx.net>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-10-09 11:05:50 +02:00
arch csky-for-linus-5.4-rc1: arch/csky patches for 5.4-rc1 2019-09-30 10:16:17 -07:00
block block: fix null pointer dereference in blk_mq_rq_timed_out() 2019-09-27 07:01:25 -06:00
certs PKCS#7: Refactor verify_pkcs7_signature() 2019-08-05 18:40:18 -04:00
crypto Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-09-28 08:14:15 -07:00
Documentation Documentation/process update for 5.4-rc1 2019-09-29 19:52:52 -07:00
drivers mmc: sdhci-iproc: fix spurious interrupts on Multiblock reads with bcm2711 2019-10-09 11:05:50 +02:00
fs for-5.4-rc1-tag 2019-09-30 10:25:24 -07:00
include A few more tracing fixes: 2019-09-30 09:29:53 -07:00
init Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-09-28 08:14:15 -07:00
ipc ipc/sem.c: convert to use built-in RCU list checking 2019-09-25 17:51:41 -07:00
kernel A few more tracing fixes: 2019-09-30 09:29:53 -07:00
lib Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-09-28 17:47:33 -07:00
LICENSES LICENSES: Rename other to deprecated 2019-05-03 06:34:32 -06:00
mm Merge branch 'hugepage-fallbacks' (hugepatch patches from David Rientjes) 2019-09-28 14:26:47 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-09-28 17:47:33 -07:00
samples rpmsg updates for v5.4 2019-09-22 10:58:15 -07:00
scripts Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity 2019-09-27 19:37:27 -07:00
security Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-09-28 08:14:15 -07:00
sound sound fixes for 5.4-rc1 2019-09-24 16:46:16 -07:00
tools A few more tracing fixes: 2019-09-30 09:29:53 -07:00
usr Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-09-28 17:47:33 -07:00
virt * s390: ioctl hardening, selftests 2019-09-18 09:49:13 -07:00
.clang-format clang-format: Update with the latest for_each macro list 2019-08-31 10:00:51 +02:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes
.gitignore Modules updates for v5.4 2019-09-22 10:34:46 -07:00
.mailmap Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2019-09-18 12:34:53 -07:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS CREDITS: Update email address 2019-09-13 17:21:38 +03:00
Kbuild kbuild: do not descend to ./Kbuild when cleaning 2019-08-21 21:03:58 +09:00
Kconfig docs: kbuild: convert docs to ReST and rename to *.rst 2019-06-14 14:21:21 -06:00
MAINTAINERS ARM SCMI fixes for v5.4 2019-09-29 11:20:41 -07:00
Makefile Linux 5.4-rc1 2019-09-30 10:35:40 -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.