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Keith Busch f80ec966c1 nvme: Limit command retries 
Many controller implementations will return errors to commands that will
not succeed, but without the DNR bit set. The driver previously retried
these commands an unlimited number of times until the command timeout
has exceeded, which takes an unnecessarilly long period of time.

This patch limits the number of retries a command can have, defaulting
to 5, but is user tunable at load or runtime.

The struct request's 'retries' field is used to track the number of
retries attempted. This is in contrast with scsi's use of this field,
which indicates how many retries are allowed.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
 		2016-07-12 16:20:31 -07:00
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accessibility
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acpi Merge branches 'acpica-fixes', 'acpi-video' and 'acpi-processor' 2016-06-03 22:35:05 +02:00
amba
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android
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ata block, drivers, cgroup: use op_is_write helper instead of checking for REQ_WRITE 2016-06-07 13:41:38 -06:00
atm atm: iphase: off by one in rx_pkt() 2016-05-31 11:52:59 -07:00
auxdisplay
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base More power management updates for v4.7-rc1 2016-05-25 15:29:21 -07:00
bcma MTD updates for v4.7: 2016-05-24 11:00:20 -07:00
block loop: Make user notify for adding loop device failed 2016-07-12 16:17:18 -07:00
bluetooth Bluetooth: Add USB ID 13D3:3487 to ath3k 2016-05-13 16:54:59 +02:00
bus Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-05-19 10:02:26 -07:00
cdrom cdrom: support read sub-channel command in LBA format 2016-07-12 08:24:50 -07:00
char Merge branch 'akpm' (patches from Andrew) 2016-05-20 22:31:33 -07:00
clk remove lots of IS_ERR_VALUE abuses 2016-05-27 15:26:11 -07:00
clocksource Small release overall. 2016-05-19 11:27:09 -07:00
connector
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cpufreq Merge branch 'pm-cpufreq-fixes' 2016-06-03 22:34:18 +02:00
cpuidle cpuidle: Fix cpuidle_state_is_coupled() argument in cpuidle_enter() 2016-05-18 02:48:37 +02:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-05-30 15:20:18 -07:00
dax /dev/dax, core: file operations and dax-mmap 2016-05-20 22:02:55 -07:00
dca
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devfreq
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dio
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dma remove lots of IS_ERR_VALUE abuses 2016-05-27 15:26:11 -07:00
dma-buf dma-buf: use vma_pages() 2016-05-31 22:17:05 +05:30
edac Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2016-05-17 17:05:30 -07:00
eisa
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extcon
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firewire
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firmware driver core update for 4.7-rc1 2016-05-20 21:26:15 -07:00
fmc
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fpga
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gpio gpio: drop lock before reading GPIO direction 2016-05-30 17:11:59 +02:00
gpu drm/omap: fix unused variable warning. 2016-06-03 14:39:41 +10:00
hid Merge branch 'for-4.7/wacom' into for-linus 2016-05-17 12:42:27 +02:00
hsi
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hv
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hwmon Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging 2016-05-26 09:48:23 -07:00
hwspinlock drivers/hwspinlock: use correct radix tree API 2016-05-20 17:58:30 -07:00
hwtracing Char / Misc driver update for 4.7-rc1 2016-05-20 21:20:31 -07:00
i2c i2c: dev: use after free in detach 2016-05-28 17:37:42 +02:00
ide block: convert to device_add_disk() 2016-06-27 12:26:08 -07:00
idle
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iio Staging and IIO driver update for 4.7-rc1 2016-05-20 22:20:48 -07:00
infiniband Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2016-05-28 12:04:17 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2016-05-27 19:14:35 -07:00
iommu remove lots of IS_ERR_VALUE abuses 2016-05-27 15:26:11 -07:00
ipack
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irqchip irqchip/irq-pic32-evic: Fix bug with external interrupts. 2016-06-02 18:03:50 +01:00
isdn TTY and Serial driver update for 4.7-rc1 2016-05-20 20:57:27 -07:00
leds pwm: Changes for v4.7-rc1 2016-05-25 10:40:15 -07:00
lguest
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lightnvm lightnvm: make __nvm_submit_ppa static 2016-07-07 08:51:52 -06:00
macintosh
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mailbox
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mcb
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md bcache: Remove redundant block_size assignment 2016-07-05 11:34:50 -06:00
media Merge branch 'hash' of git://ftp.sciencehorizons.net/linux 2016-05-28 16:15:25 -07:00
memory MTD updates for v4.7: 2016-05-24 11:00:20 -07:00
memstick block: convert to device_add_disk() 2016-06-27 12:26:08 -07:00
message SCSI misc on 20160517 2016-05-18 16:38:59 -07:00
mfd remove lots of IS_ERR_VALUE abuses 2016-05-27 15:26:11 -07:00
misc Char / Misc driver update for 4.7-rc1 2016-05-20 21:20:31 -07:00
mmc mmc: move 'parent' tracking to mmc_blk_data 2016-06-22 10:13:20 -07:00
mtd block: convert to device_add_disk() 2016-06-27 12:26:08 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-31 22:28:28 -07:00
nfc
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ntb
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nubus
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nvdimm block: remove ->driverfs_dev 2016-06-27 12:26:08 -07:00
nvme nvme: Limit command retries 2016-07-12 16:20:31 -07:00
nvmem remove lots of IS_ERR_VALUE abuses 2016-05-27 15:26:11 -07:00
of MTD updates for v4.7: 2016-05-24 11:00:20 -07:00
oprofile
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parisc
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parport
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pci Char / Misc driver update for 4.7-rc1 2016-05-20 21:20:31 -07:00
pcmcia
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perf drivers/perf: arm_pmu: Avoid leaking pmu->irq_affinity on error 2016-06-03 10:16:21 +01:00
phy USB patches for 4.7-rc1 2016-05-20 21:12:25 -07:00
pinctrl pinctrl: mediatek: fix dual-edge code defect 2016-05-31 10:13:45 +02:00
platform platform/chrome: Driver and binding changes for 4.7 2016-05-28 12:32:01 -07:00
pnp driver core update for 4.7-rc1 2016-05-20 21:26:15 -07:00
power power supply and reset changes for the v4.7 series 2016-05-20 14:06:21 -07:00
powercap Power management material for v4.7-rc1 2016-05-16 19:17:22 -07:00
pps
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ps3
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ptp ptp: oops in ptp_ioctl() 2016-05-29 22:32:27 -07:00
pwm pwm: Changes for v4.7-rc1 2016-05-25 10:40:15 -07:00
rapidio
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ras
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regulator regulator: pwm: Use pwm_get_args() where appropriate 2016-05-17 14:45:02 +02:00
remoteproc remoteproc: Add additional crash reasons 2016-05-12 15:50:19 -07:00
reset
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rpmsg
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rtc rtc: tps6586x: rename so module can be autoloaded 2016-05-21 17:07:17 +02:00
s390 block: convert to device_add_disk() 2016-06-27 12:26:08 -07:00
sbus openprom: fix warning 2016-05-20 18:33:37 -07:00
scsi block: convert to device_add_disk() 2016-06-27 12:26:08 -07:00
sfi
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sh
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sn
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soc soc: mtk-pmic-wrap: avoid integer overflow warning 2016-05-19 15:20:24 +02:00
spi sound updates #2 for 4.7-rc1 2016-05-28 12:23:12 -07:00
spmi
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ssb
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staging block, fs, mm, drivers: use bio set/get op accessors 2016-06-07 13:41:38 -06:00
target target: use bio op accessors 2016-06-07 13:41:38 -06:00
tc
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thermal Merge branches 'acpica-fixes', 'acpi-video' and 'acpi-processor' 2016-06-03 22:35:05 +02:00
thunderbolt
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tty devpts: Make each mount of devpts an independent filesystem. 2016-06-05 10:36:01 -07:00
uio
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usb Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2016-05-28 12:04:17 -07:00
uwb
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vfio vfio/pci: Allow VPD short read 2016-05-31 21:25:52 -06:00
vhost
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video OMAPDSS: HDMI5: Change DDC timings 2016-05-31 08:20:43 +03:00
virt
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virtio virtio_balloon: fix PFN format for virtio-1 2016-05-22 19:44:13 +03:00
vlynq
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vme
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w1
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watchdog Merge git://www.linux-watchdog.org/linux-watchdog 2016-05-25 10:19:17 -07:00
xen Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2016-05-28 12:04:17 -07:00
zorro
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Kconfig libnvdimm for 4.7 2016-05-23 11:18:01 -07:00
Makefile /dev/dax, pmem: direct access to persistent memory 2016-05-20 22:02:53 -07:00