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Martin Blumenstingl 144857ac52 mmc: meson-mx-sdio: remove the broken ->card_busy() op commit `ddca1092c4` upstream. The recent commit `0d84c3e6a5` ("mmc: core: Convert to mmc_poll_for_busy() for erase/trim/discard") makes use of the ->card_busy() op for SD cards. This uncovered that the ->card_busy() op in the Meson SDIO driver was never working right: while polling the busy status with ->card_busy() meson_mx_mmc_card_busy() reads only one of the two MESON_MX_SDIO_IRQC register values 0x1f001f10 or 0x1f003f10. This translates to "three out of four DAT lines are HIGH" and "all four DAT lines are HIGH", which is interpreted as "the card is busy". It turns out that no situation can be observed where all four DAT lines are LOW, meaning the card is not busy anymore. Upon further research the 3.10 vendor driver for this controller does not implement the ->card_busy() op. Remove the ->card_busy() op from the meson-mx-sdio driver since it is not working. At the time of writing this patch it is not clear what's needed to make the ->card_busy() implementation work with this specific controller hardware. For all use-cases which have previously worked the MMC_CAP_WAIT_WHILE_BUSY flag is now taking over, even if we don't have a ->card_busy() op anymore. Fixes: `ed80a13bb4` ("mmc: meson-mx-sdio: Add a driver for the Amlogic Meson8 and Meson8b SoCs") Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20200416183513.993763-3-martin.blumenstingl@googlemail.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-05-06 08:13:34 +02:00
arch	bpf, x86_32: Fix clobbering of dst for BPF_JSET	2020-05-02 17:26:00 +02:00
block	block, bfq: fix use-after-free in bfq_idle_slice_timer_body	2020-04-17 10:48:42 +02:00
certs	export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR()	2018-08-22 23:21:44 +09:00
crypto	crypto: api - Fix race condition in crypto_spawn_alg	2020-02-11 04:34:05 -08:00
Documentation	arm64: errata: Hide CTR_EL0.DIC on systems affected by Neoverse-N1 #1542419	2020-04-29 16:31:08 +02:00
drivers	mmc: meson-mx-sdio: remove the broken ->card_busy() op	2020-05-06 08:13:34 +02:00
firmware	Fix built-in early-load Intel microcode alignment	2020-01-23 08:21:29 +01:00
fs	btrfs: transaction: Avoid deadlock due to bad initialization timing of fs_info::journal_info	2020-05-06 08:13:33 +02:00
include	qed: Fix use after free in qed_chain_free	2020-05-02 17:26:00 +02:00
init	fork: fix some -Wmissing-prototypes warnings	2019-12-05 09:21:04 +01:00
ipc	ipc/util.c: sysvipc_find_ipc() should increase position index	2020-04-29 16:31:13 +02:00
kernel	PM: hibernate: Freeze kernel threads in software_resume()	2020-05-06 08:13:28 +02:00
lib	lib/raid6: use vdupq_n_u8 to avoid endianness warnings	2020-04-23 10:30:15 +02:00
LICENSES	LICENSES: Remove CC-BY-SA-4.0 license text	2018-10-18 11:28:50 +02:00
mm	mm: shmem: disable interrupt when acquiring info->lock in userfaultfd_copy path	2020-05-02 17:25:54 +02:00
net	svcrdma: Fix leak of svc_rdma_recv_ctxt objects	2020-05-02 17:25:52 +02:00
samples	vmalloc: fix remap_vmalloc_range() bounds checks	2020-04-29 16:31:27 +02:00
scripts	kconfig: qconf: Fix a few alignment issues	2020-04-29 16:31:13 +02:00
security	selinux: properly handle multiple messages in selinux_netlink_send()	2020-05-06 08:13:32 +02:00
sound	ALSA: opti9xx: shut up gcc-10 range warning	2020-05-06 08:13:32 +02:00
tools	objtool: Support Clang non-section symbols in ORC dump	2020-05-02 17:25:57 +02:00
usr	initramfs: restore default compression behavior	2020-04-13 10:44:59 +02:00
virt	x86/kvm: Cache gfn to pfn translation	2020-04-29 16:31:19 +02:00
.clang-format	clang-format: Set IndentWrappedFunctionNames false	2018-08-01 18:38:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore	Kbuild updates for v4.17 (2nd)	2018-04-15 17:21:30 -07:00
.mailmap	libnvdimm-for-4.19_misc	2018-08-25 18:13:10 -07:00
COPYING	COPYING: use the new text with points to the license files	2018-03-23 12:41:45 -06:00
CREDITS	9p: remove Ron Minnich from MAINTAINERS	2018-08-17 16:20:26 -07:00
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	MAINTAINERS: Update drm/i915 bug filing URL	2020-02-28 16:38:49 +01:00
Makefile	Linux 4.19.120	2020-05-02 17:26:01 +02:00
README	Docs: Added a pointer to the formatted docs to README	2018-03-21 09:02:53 -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.
See Documentation/00-INDEX for a list of what is contained in each file.

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.