Pull MMC updates from Ulf Hansson:
 "MMC core:
   - Decrease polling rate for erase/trim/discard
   - Allow non-sleeping GPIOs for card detect
   - Improve mmc block removal path
   - Enable support for mmc_sw_reset() for SDIO cards
   - Add mmc_sw_reset() to allow users to do a soft reset of the card
   - Allow power delay to be tunable via DT
   - Allow card detect debounce delay to be tunable via DT
   - Enable new quirk to limit clock rate for Marvell 8887 chip
   - Don't show eMMC RPMB and BOOT areas in /proc/partitions
   - Add capability to avoid 3.3V signaling for fragile HWs

  MMC host:
   - Improve/fixup support for handle highmem pages
   - Remove depends on HAS_DMA in case of platform dependency
   - mvsdio: Enable support for erase/trim/discard
   - rtsx_usb: Enable support for erase/trim/discard
   - renesas_sdhi: Fix WP logic regressions
   - renesas_sdhi: Add r8a77965 support
   - renesas_sdhi: Add R8A77980 to whitelist
   - meson: Add optional support for device reset
   - meson: Add support for the Meson-AXG platform
   - dw_mmc: Add new driver for BlueField DW variant
   - mediatek: Add support for 64G DRAM DMA
   - sunxi: Deploy runtime PM support
   - jz4740: Add support for JZ4780
   - jz4740: Enable support for DT based platforms
   - sdhci: Various improvement to timeout handling
   - sdhci: Disable support for HS200/HS400/UHS when no 1.8V support
   - sdhci-omap: Add support for controller in k2g SoC
   - sdhci-omap: Add workarounds for a couple of Erratas
   - sdhci-omap: Enable support for generic sdhci DT properties
   - sdhci-cadence: Re-send tune request to deal with errata
   - sdhci-pci: Fix 3.3V voltage switch for some BYT-based Intel controllers
   - sdhci-pci: Avoid 3.3V signaling on some NI 904x
   - sdhci-esdhc-imx: Use watermark levels for PIO access
   - sdhci-msm: Improve card detection handling
   - sdhci-msm: Add support voltage pad switching"

* tag 'mmc-v4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: (104 commits)
  mmc: renesas_sdhi: really fix WP logic regressions
  mmc: mvsdio: Enable MMC_CAP_ERASE
  mmc: mvsdio: Respect card busy time out from mmc core
  mmc: sdhci-msm: Remove NO_CARD_NO_RESET quirk
  mmc: sunxi: Use ifdef rather than __maybe_unused
  mmc: mxmmc: Use ifdef rather than __maybe_unused
  mmc: mxmmc: include linux/highmem.h
  mmc: sunxi: mark PM functions as __maybe_unused
  mmc: Throttle calls to MMC_SEND_STATUS during mmc_do_erase()
  mmc: au1xmmc: handle highmem pages
  mmc: Allow non-sleeping GPIO cd
  mmc: sdhci-*: Don't emit error msg if sdhci_add_host() fails
  mmc: sd: Define name for default speed dtr
  mmc: core: Move calls to ->prepare_hs400_tuning() closer to mmc code
  mmc: sdhci-xenon: use match_string() helper
  mmc: wbsd: handle highmem pages
  mmc: ushc: handle highmem pages
  mmc: mxcmmc: handle highmem pages
  mmc: atmel-mci: use sg_copy_{from,to}_buffer
  mmc: android-goldfish: use sg_copy_{from,to}_buffer
  ...

Pull block updates from Jens Axboe:

 - clean up how we pass around gfp_t and
   blk_mq_req_flags_t (Christoph)

 - prepare us to defer scheduler attach (Christoph)

 - clean up drivers handling of bounce buffers (Christoph)

 - fix timeout handling corner cases (Christoph/Bart/Keith)

 - bcache fixes (Coly)

 - prep work for bcachefs and some block layer optimizations (Kent).

 - convert users of bio_sets to using embedded structs (Kent).

 - fixes for the BFQ io scheduler (Paolo/Davide/Filippo)

 - lightnvm fixes and improvements (Matias, with contributions from Hans
   and Javier)

 - adding discard throttling to blk-wbt (me)

 - sbitmap blk-mq-tag handling (me/Omar/Ming).

 - remove the sparc jsflash block driver, acked by DaveM.

 - Kyber scheduler improvement from Jianchao, making it more friendly
   wrt merging.

 - conversion of symbolic proc permissions to octal, from Joe Perches.
   Previously the block parts were a mix of both.

 - nbd fixes (Josef and Kevin Vigor)

 - unify how we handle the various kinds of timestamps that the block
   core and utility code uses (Omar)

 - three NVMe pull requests from Keith and Christoph, bringing AEN to
   feature completeness, file backed namespaces, cq/sq lock split, and
   various fixes

 - various little fixes and improvements all over the map

* tag 'for-4.18/block-20180603' of git://git.kernel.dk/linux-block: (196 commits)
  blk-mq: update nr_requests when switching to 'none' scheduler
  block: don't use blocking queue entered for recursive bio submits
  dm-crypt: fix warning in shutdown path
  lightnvm: pblk: take bitmap alloc. out of critical section
  lightnvm: pblk: kick writer on new flush points
  lightnvm: pblk: only try to recover lines with written smeta
  lightnvm: pblk: remove unnecessary bio_get/put
  lightnvm: pblk: add possibility to set write buffer size manually
  lightnvm: fix partial read error path
  lightnvm: proper error handling for pblk_bio_add_pages
  lightnvm: pblk: fix smeta write error path
  lightnvm: pblk: garbage collect lines with failed writes
  lightnvm: pblk: rework write error recovery path
  lightnvm: pblk: remove dead function
  lightnvm: pass flag on graceful teardown to targets
  lightnvm: pblk: check for chunk size before allocating it
  lightnvm: pblk: remove unnecessary argument
  lightnvm: pblk: remove unnecessary indirection
  lightnvm: pblk: return NVM_ error on failed submission
  lightnvm: pblk: warn in case of corrupted write buffer
  ...

It's pointless to switch and trace partition type if the current
selected device partition is the same with that one. Moreover, cycled
claiming host associated with mmc_blk_part_switch() could make
mmc_blk_remove() end up waiting for grabbing the context if it's
occupied, which lead requests could still hit the low-level drivers,
if an asynchronous unbind for host drivers happened, as the card hasn't
been set removed in the remove path.

So a simple dd in background:
dd if=/dev/mmcblk0 of=/dev/null bs=512k count=100000 &

and doing unbind then:
echo fe320000.dwmmc > /sys/bus/platform/drivers/dwmmc_rockchip/unbind

could make the console stuck for quite a while depending on the
numbers of requests.

Suggested-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

In commit 97548575bef3 ("mmc: block: Convert RPMB to a character device") a
new function `mmc_rpmb_ioctl` was added. The final return is simply
returning a value of `0` instead of propagating the correct return code.

Discovered during a compilation with W=1, silence the following gcc warning

drivers/mmc/core/block.c:2470:6: warning: variable ‘ret’ set but not used
[-Wunused-but-set-variable]

Signed-off-by: Mathieu Malaterre <malat@debian.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Fixes: 97548575bef3 ("mmc: block: Convert RPMB to a character device")
Cc: stable@vger.kernel.org # v4.15+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Switch everyone to blk_get_request_flags, and then rename
blk_get_request_flags to blk_get_request.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Since RPMB area is accessible via special ioctl only and boot areas
are unlikely to contain any partitions, exclude them all from listing
in /proc/partitions. This will hide them from various user-level
software (e.g. fdisk), thus avoiding unnecessary access attempts.

Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Signed-off-by: Harish Jenny K N <harish_kandiga@mentor.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Pull MMC fixes from Ulf Hansson:
 "MMC core:
   - Prevent bus reference leak in mmc_blk_init()

  MMC host:
   - tmio: Fix error handling when issuing CMD23
   - jz4740: Fix race condition in IRQ mask update"

* tag 'mmc-v4.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: tmio: Fix error handling when issuing CMD23
  mmc: core: Prevent bus reference leak in mmc_blk_init()
  mmc: jz4740: Fix race condition in IRQ mask update

Pull block layer updates from Jens Axboe:
 "It's a pretty quiet round this time, which is nice. This contains:

   - series from Bart, cleaning up the way we set/test/clear atomic
     queue flags.

   - series from Bart, fixing races between gendisk and queue
     registration and removal.

   - set of bcache fixes and improvements from various folks, by way of
     Michael Lyle.

   - set of lightnvm updates from Matias, most of it being the 1.2 to
     2.0 transition.

   - removal of unused DIO flags from Nikolay.

   - blk-mq/sbitmap memory ordering fixes from Omar.

   - divide-by-zero fix for BFQ from Paolo.

   - minor documentation patches from Randy.

   - timeout fix from Tejun.

   - Alpha "can't write a char atomically" fix from Mikulas.

   - set of NVMe fixes by way of Keith.

   - bsg and bsg-lib improvements from Christoph.

   - a few sed-opal fixes from Jonas.

   - cdrom check-disk-change deadlock fix from Maurizio.

   - various little fixes, comment fixes, etc from various folks"

* tag 'for-4.17/block-20180402' of git://git.kernel.dk/linux-block: (139 commits)
  blk-mq: Directly schedule q->timeout_work when aborting a request
  blktrace: fix comment in blktrace_api.h
  lightnvm: remove function name in strings
  lightnvm: pblk: remove some unnecessary NULL checks
  lightnvm: pblk: don't recover unwritten lines
  lightnvm: pblk: implement 2.0 support
  lightnvm: pblk: implement get log report chunk
  lightnvm: pblk: rename ppaf* to addrf*
  lightnvm: pblk: check for supported version
  lightnvm: implement get log report chunk helpers
  lightnvm: make address conversions depend on generic device
  lightnvm: add support for 2.0 address format
  lightnvm: normalize geometry nomenclature
  lightnvm: complete geo structure with maxoc*
  lightnvm: add shorten OCSSD version in geo
  lightnvm: add minor version to generic geometry
  lightnvm: simplify geometry structure
  lightnvm: pblk: refactor init/exit sequences
  lightnvm: Avoid validation of default op value
  lightnvm: centralize permission check for lightnvm ioctl
  ...

Upon module load, mmc_block allocates a bus with bus_registeri() in
mmc_blk_init(). This reference never gets freed during module unload, which
leads to subsequent re-insertions of the module fails and a WARN() splat is
triggered.

Fix the bug by dropping the reference for the bus in mmc_blk_exit().

Signed-off-by: Alexander Kappner <agk@godking.net>
Fixes: 97548575bef3 ("mmc: block: Convert RPMB to a character device")
Cc: <stable@vger.kernel.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>