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Chaitanya Kulkarni 6e02318eae nvme: add support for the Write Zeroes command 
Allow write zeroes operations (REQ_OP_WRITE_ZEROES) on the block
device, if the device supports an optional command bit set for write
zeroes. Add support to setup write zeroes command. Set maximum possible
write zeroes sectors in one write zeroes command according to
nvme write zeroes command definition.

This patch was posted as a part of block-write-zeroes support
implementation (https://patchwork.kernel.org/patch/9454859/),
but did not make into mainline kernel as it got reverted due to
failure on the Linus's machine.

In this patch in order to be more cautious, we use NVMe controller's
maximum hardware sector size which is calculated based on the
controller's MDTS (Maximum Data Transfer Size) field to calculate
the maximum sectors for the write zeroes request.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
[folded a fix from Keith Busch to properly respect
 NVME_QUIRK_DEALLOCATE_ZEROES]
Signed-off-by: Christoph Hellwig <hch@lst.de>
 		2019-02-04 15:41:25 +01:00
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accessibility
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acpi acpi/nfit: Fix command-supported detection 2019-01-21 09:58:31 -08:00
amba
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android binderfs: switch from d_add() to d_instantiate() 2019-01-22 12:25:54 +01:00
ata SCSI fixes on 20190125 2019-01-26 15:03:43 -08:00
atm atm: he: fix sign-extension overflow on large shift 2019-01-17 11:27:00 -08:00
auxdisplay auxdisplay: charlcd: fix x/y command parsing 2018-12-21 21:27:21 +01:00
base regmap: Fixes for v5.0 2019-01-19 07:17:19 +12:00
bcma
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block mtip32xx: ѕtop abusing the managed resource APIs 2019-01-31 12:50:12 -07:00
bluetooth Bluetooth: hci_bcm: Handle specific unknown packets after firmware loading 2018-12-19 13:43:42 +01:00
bus ARM: SoC driver updates 2018-12-31 17:32:35 -08:00
cdrom gdrom: fix a memory leak bug 2018-12-29 08:20:44 -07:00
char Char/Misc driver fixes for 5.0-rc4 2019-01-25 13:03:34 -10:00
clk clk: socfpga: stratix10: fix naming convention for the fixed-clocks 2019-01-15 12:58:38 -08:00
clocksource arch/csky patches for 4.21-rc1 2019-01-05 09:50:07 -08:00
connector
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cpufreq Merge branches 'pm-cpuidle', 'pm-cpufreq' and 'pm-sleep' 2019-01-11 10:09:51 +01:00
cpuidle powerpc updates for 4.21 2018-12-27 10:43:24 -08:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-01-19 05:48:43 +12:00
dax mm, devm_memremap_pages: fix shutdown handling 2018-12-28 12:11:47 -08:00
dca
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devfreq
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dio
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dma cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
dma-buf drivers/dma-buf/udmabuf.c: convert to use vm_fault_t 2019-01-04 13:13:46 -08:00
edac EDAC, altera: Fix S10 persistent register offset 2019-01-24 17:13:59 +01:00
eisa
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extcon
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firewire scsi: communicate max segment size to the DMA mapping code 2019-01-22 20:40:59 -05:00
firmware arm64 fixes for -rc1 2019-01-05 11:28:39 -08:00
fmc
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fpga Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
fsi
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gnss
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gpio gpio: pca953x: Make symbol 'pca953x_i2c_regmap' static 2019-01-11 09:16:40 +01:00
gpu Merge tag 'drm-msm-fixes-2019-01-24' of git://people.freedesktop.org/~robclark/linux into drm-fixes 2019-01-25 07:45:00 +10:00
hid HID: core: simplify active collection tracking 2019-01-16 14:29:48 +01:00
hsi
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hv vmbus: fix subchannel removal 2019-01-09 19:20:31 -05:00
hwmon hwmon: (tmp421) Correct the misspelling of the tmp442 compatible attribute in OF device ID table 2019-01-17 12:54:52 -08:00
hwspinlock hwspinlock: fix return value check in stm32_hwspinlock_probe() 2019-01-03 11:42:10 -08:00
hwtracing intel_th: msu: Fix an off-by-one in attribute store 2018-12-19 20:21:06 +01:00
i2c i2c: tegra: Fix Maximum transfer size 2019-01-11 00:15:04 +01:00
i3c i3c: master: Fix an error checking typo in 'cdns_i3c_master_probe()' 2019-01-22 13:56:37 +01:00
ide ide: fix a typo in the settings proc file name 2019-01-22 15:08:12 +13:00
idle
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iio - New Device Support 2019-01-15 06:24:36 +12:00
infiniband First 5.0 rc pull request 2019-01-18 17:17:20 +12:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2019-01-27 09:07:03 -08:00
iommu IOMMU Fix for Linux v5.0-rc3 2019-01-22 07:27:17 +13:00
ipack
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irqchip irqchip updates for 5.0-rc3 2019-01-18 23:32:29 +01:00
isdn isdn: avm: Fix string plus integer warning from Clang 2019-01-19 10:01:03 -08:00
leds leds: lp5523: fix a missing check of return value of lp55xx_read 2019-01-17 22:27:39 +01:00
lightnvm lightnvm: pblk: fix use-after-free bug 2018-12-22 14:45:35 -07:00
macintosh Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
mailbox mailbox: tegra-hsp: Use device-managed registration API 2018-12-21 22:31:26 -06:00
mcb
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md - Fix DM crypt's parsing of extended IV arguments. 2019-01-25 09:07:18 +13:00
media media: vim2m: only cancel work if it is for right context 2019-01-16 11:13:25 -05:00
memory ARM: SoC: late updates 2019-01-05 11:30:37 -08:00
memstick MMC core: 2018-12-28 16:52:18 -08:00
message scsi: flip the default on use_clustering 2018-12-18 23:13:12 -05:00
mfd - New Device Support 2019-01-15 06:24:36 +12:00
misc Char/Misc driver fixes for 5.0-rc4 2019-01-25 13:03:34 -10:00
mmc MMC host: 2019-01-25 13:07:03 -10:00
mtd mtd: rawnand: denali: get ->setup_data_interface() working again 2019-01-18 10:27:01 +01:00
mux
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net qed: Revert error handling changes. 2019-01-25 15:32:28 -08:00
nfc
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ntb cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
nubus
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nvdimm libnvdimm/security: Require nvdimm_security_setup_events() to succeed 2019-01-21 09:57:43 -08:00
nvme nvme: add support for the Write Zeroes command 2019-02-04 15:41:25 +01:00
nvmem
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of OF: properties: add missing of_node_put 2019-01-16 12:49:53 -06:00
opp cpufreq: scpi/scmi: Fix freeing of dynamic OPPs 2019-01-04 12:19:40 +01:00
oprofile
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parisc Kconfig file consolidation for v4.21 2018-12-29 13:40:29 -08:00
parport
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pci pci-v5.0-fixes-2 2019-01-19 07:26:16 +12:00
pcmcia Included in this update: 2019-01-05 11:23:17 -08:00
perf drivers/perf: hisi: Fixup one DDRC PMU register offset 2019-01-04 10:13:27 +00:00
phy USB/PHY fixes for 5.0-rc4 2019-01-25 12:57:09 -10:00
pinctrl Pin control bulk changes for the v4.21 kernel cycle: 2019-01-01 13:19:16 -08:00
platform platform/x86: apple-gmux: Make PCI dependency explicit 2019-01-15 23:17:16 +01:00
pnp Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
power power supply and reset changes for the v4.21 series 2018-12-28 20:22:45 -08:00
powercap
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pps Kconfig updates for v4.21 2018-12-29 13:03:29 -08:00
ps3
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ptp ptp: check that rsv field is zero in struct ptp_sys_offset_extended 2019-01-08 16:22:56 -05:00
pwm pwm: imx: Add ipg clock operation 2018-12-24 12:06:56 +01:00
rapidio cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
ras treewide: surround Kconfig file paths with double quotes 2018-12-22 00:25:54 +09:00
regulator Merge remote-tracking branch 'regulator/topic/coupled' into regulator-next 2018-12-21 13:43:35 +00:00
remoteproc virtio: don't allocate vqs when names[i] = NULL 2019-01-14 20:15:19 -05:00
reset reset: uniphier-glue: Add AHCI reset control support in glue layer 2019-01-07 16:38:51 +01:00
rpmsg
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rtc RTC for 4.21 2019-01-01 13:24:31 -08:00
s390 s390 update with bug fixes for 5.0-rc4 2019-01-24 08:58:01 +13:00
sbus Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next 2018-12-26 10:32:18 -08:00
scsi SCSI fixes on 20190125 2019-01-26 15:03:43 -08:00
sfi
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sh
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siox
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slimbus
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sn
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soc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-01-16 05:13:36 +12:00
soundwire
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spi cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
spmi
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ssb
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staging staging: android: ion: Support cpu access during dma_buf_detach 2019-01-22 11:38:09 +01:00
target scsi: tcmu: fix use after free 2019-01-22 20:54:00 -05:00
tc
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tee OP-TEE dynamic shm log message 2018-12-31 13:06:30 -08:00
thermal Merge branch 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2019-01-23 16:23:41 +13:00
thunderbolt
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tty serial: fsl_lpuart: fix maximum acceptable baud rate with over-sampling 2019-01-22 09:32:08 +01:00
uio Char/Misc driver patches for 4.21-rc1 2018-12-28 20:54:57 -08:00
usb USB-serial fixes for 5.0-rc3 2019-01-18 12:58:20 +01:00
uwb
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vfio vfio-pci/nvlink2: Fix ancient gcc warnings 2019-01-23 08:20:43 -07:00
vhost Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-01-21 12:52:31 +13:00
video TTY/Serial driver fixes for 5.0-rc4 2019-01-25 12:58:40 -10:00
virt
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virtio virtio-balloon: tweak config_changed implementation 2019-01-14 20:15:20 -05:00
visorbus
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vlynq
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vme
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w1 treewide: surround Kconfig file paths with double quotes 2018-12-22 00:25:54 +09:00
watchdog watchdog: tqmx86: Fix a couple IS_ERR() vs NULL bugs 2019-01-07 10:10:35 +01:00
xen arm64/xen: fix xen-swiotlb cache flushing 2019-01-23 22:14:56 +01:00
zorro
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Kconfig Kconfig file consolidation for v4.21 2018-12-29 13:40:29 -08:00
Makefile
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