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Jonas Danielsson aa0703b7af mmc: atmel-mci: do not assume idle after atmci_request_end [ Upstream commit `ae460c115b` ] On our AT91SAM9260 board we use the same sdio bus for wifi and for the sd card slot. This caused the atmel-mci to give the following splat on the serial console: ------------[ cut here ]------------ WARNING: CPU: 0 PID: 538 at drivers/mmc/host/atmel-mci.c:859 atmci_send_command+0x24/0x44 Modules linked in: CPU: 0 PID: 538 Comm: mmcqd/0 Not tainted 4.14.76 #14 Hardware name: Atmel AT91SAM9 [<c000fccc>] (unwind_backtrace) from [<c000d3dc>] (show_stack+0x10/0x14) [<c000d3dc>] (show_stack) from [<c0017644>] (__warn+0xd8/0xf4) [<c0017644>] (__warn) from [<c0017704>] (warn_slowpath_null+0x1c/0x24) [<c0017704>] (warn_slowpath_null) from [<c033bb9c>] (atmci_send_command+0x24/0x44) [<c033bb9c>] (atmci_send_command) from [<c033e984>] (atmci_start_request+0x1f4/0x2dc) [<c033e984>] (atmci_start_request) from [<c033f3b4>] (atmci_request+0xf0/0x164) [<c033f3b4>] (atmci_request) from [<c0327108>] (mmc_start_request+0x280/0x2d0) [<c0327108>] (mmc_start_request) from [<c032800c>] (mmc_start_areq+0x230/0x330) [<c032800c>] (mmc_start_areq) from [<c03366f8>] (mmc_blk_issue_rw_rq+0xc4/0x310) [<c03366f8>] (mmc_blk_issue_rw_rq) from [<c03372c4>] (mmc_blk_issue_rq+0x118/0x5ac) [<c03372c4>] (mmc_blk_issue_rq) from [<c033781c>] (mmc_queue_thread+0xc4/0x118) [<c033781c>] (mmc_queue_thread) from [<c002daf8>] (kthread+0x100/0x118) [<c002daf8>] (kthread) from [<c000a580>] (ret_from_fork+0x14/0x34) ---[ end trace 594371ddfa284bd6 ]--- This is: WARN_ON(host->cmd); This was fixed on our board by letting atmci_request_end determine what state we are in. Instead of unconditionally setting it to STATE_IDLE on STATE_END_REQUEST. Signed-off-by: Jonas Danielsson <jonas@orbital-systems.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2019-01-26 09:20:46 +01:00
arch	x86/resctrl: Fix rdt_find_domain() return value and checks	2019-01-26 09:20:45 +01:00
block	block: use rcu_work instead of call_rcu to avoid sleep in softirq	2019-01-22 21:09:57 +01:00
certs	export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR()	2018-08-22 23:21:44 +09:00
crypto	crypto: ecc - regularize scalar for scalar multiplication	2019-01-26 09:20:41 +01:00
Documentation	x86/speculation/l1tf: Drop the swap storage limit restriction when l1tf=off	2019-01-09 17:45:54 +01:00
drivers	mmc: atmel-mci: do not assume idle after atmci_request_end	2019-01-26 09:20:46 +01:00
firmware	kbuild: remove all dummy assignments to obj-	2017-11-18 11:46:06 +09:00
fs	pstore/ram: Do not treat empty buffers as valid	2019-01-26 09:20:43 +01:00
include	scsi: target/core: Make sure that target_wait_for_sess_cmds() waits long enough	2019-01-26 09:20:45 +01:00
init	kbuild: Disable LD_DEAD_CODE_DATA_ELIMINATION with ftrace & GCC <= 4.7	2019-01-22 21:09:54 +01:00
ipc	ipc: IPCMNI limit check for semmni	2018-10-31 08:54:14 -07:00
kernel	bpf: relax verifier restriction on BPF_MOV \| BPF_ALU	2019-01-26 09:20:45 +01:00
lib	fix int_sqrt64() for very large numbers	2019-01-22 21:09:55 +01:00
LICENSES	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
mm	mm: page_mapped: don't assume compound page is huge or THP	2019-01-16 22:03:26 +01:00
net	net: call sk_dst_reset when set SO_DONTROUTE	2019-01-26 09:20:44 +01:00
samples	samples: bpf: fix: error handling regarding kprobe_events	2019-01-26 09:20:42 +01:00
scripts	kconfig: fix memory leak when EOF is encountered in quotation	2019-01-26 09:20:46 +01:00
security	selinux: always allow mounting submounts	2019-01-26 09:20:42 +01:00
sound	ASoC: use dma_ops of parent device for acp_audio_dma	2019-01-26 09:20:44 +01:00
tools	bpf: relax verifier restriction on BPF_MOV \| BPF_ALU	2019-01-26 09:20:45 +01:00
usr	initramfs: move gen_initramfs_list.sh from scripts/ to usr/	2018-08-22 23:21:44 +09:00
virt	KVM: arm/arm64: vgic: Fix off-by-one bug in vgic_get_irq()	2019-01-09 17:46:04 +01:00
.clang-format	page cache: Convert find_get_pages_contig to XArray	2018-10-21 10:46:34 -04:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.get_maintainer.ignore	Add hch to .get_maintainer.ignore	2015-08-21 14:30:10 -07:00
.gitattributes	.gitattributes: set git diff driver for C source code files	2016-10-07 18:46:30 -07:00
.gitignore	Kbuild updates for v4.17 (2nd)	2018-04-15 17:21:30 -07:00
.mailmap	mailmap: Update email for Punit Agrawal	2018-11-05 10:02:11 +00:00
COPYING	COPYING: use the new text with points to the license files	2018-03-23 12:41:45 -06:00
CREDITS	MAINTAINERS: update entry for MMP platform	2018-12-03 12:39:57 -08:00
Kbuild	Kbuild updates for v4.15	2017-11-17 17:45:29 -08:00
Kconfig	kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt	2018-08-02 08:06:55 +09:00
MAINTAINERS	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-12-21 14:21:17 -08:00
Makefile	kbuild: let fixdep directly write to .*.cmd files	2019-01-26 09:20:43 +01:00
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.