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linux-sg2042
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Bjorn Helgaas 40b960831c PCI: pciehp: Compute timeout from hotplug command start time 
If we issue a hotplug command, go do something else, then come back and
wait for the command to complete, we don't have to wait the whole timeout
period, because some of it elapsed while we were doing something else.

Keep track of the time we issued the command, and wait only until the
timeout period from that point has elapsed.

For controllers with errata like Intel CF118, we previously timed out
before issuing the second hotplug command:

  At time T1 (during boot):
    - Write DLLSCE, ABPE, PDCE, etc. to Slot Control
  At time T2 (hotplug event):
    - Wait for command completion (CC) in Slot Status
    - Timeout at T2 + 1 second because CC is never set in Slot Status
    - Write PCC, PIC, etc. to Slot Control

With this change, we wait until T1 + 1 second instead of T2 + 1 second.
If the hotplug event is more than 1 second after the boot-time
initialization, we won't wait for the timeout at all.

We still emit a "Timeout on hotplug command" message if it timed out; we
should see this on the first hotplug event on every controller with this
erratum, as well as on real errors on controllers without the erratum.

Link: http://www.intel.com/content/www/us/en/processors/xeon/xeon-e7-v2-spec-update.html
Tested-by: Rajat Jain <rajatxjain@gmail.com>	(IDT 807a controller)
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
 		2014-06-17 15:26:11 -06:00
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accessibility
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acpi Merge branch 'pm-sleep' 2014-06-12 13:43:08 +02:00
amba
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ata Merge branch 'for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2014-06-09 14:58:36 -07:00
atm atm: fore200e.c: Cleaning up uninitialized variables 2014-06-02 17:11:03 -07:00
auxdisplay
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base More ACPI and power management updates for 3.16-rc1 2014-06-12 13:14:19 -07:00
bcma
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block Merge git://git.infradead.org/users/willy/linux-nvme 2014-06-15 15:58:03 -10:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
bus ARM: SoC driver changes 2014-06-02 16:35:49 -07:00
cdrom Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2014-06-11 08:41:17 -07:00
char Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-06-12 10:30:18 -07:00
clk This pull request contains the second half the of the clk changes for 2014-06-15 16:02:20 -10:00
clocksource Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next 2014-06-04 15:57:20 -07:00
connector Char / misc driver patches for 3.16-rc1 2014-06-03 08:06:56 -07:00
cpufreq Merge branch 'pm-cpufreq' 2014-06-12 13:43:02 +02:00
cpuidle Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-06-12 20:11:38 -07:00
crypto crypto/nx: disable NX on little endian builds 2014-06-11 17:03:19 +10:00
dca
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devfreq
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dio
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dma Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2014-06-10 10:28:45 -07:00
edac PCI changes for the v3.16 merge window: 2014-06-02 12:15:19 -07:00
eisa
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extcon
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firewire sound updates for 3.16-rc1 2014-06-04 09:08:25 -07:00
firmware Merge branch 'arm64-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next 2014-06-05 13:15:32 -07:00
fmc
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gpio gpio: of: Fix handling for deferred probe for -gpio suffix 2014-06-12 09:57:00 +02:00
gpu Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2014-06-12 11:32:30 -07:00
hid Most of this is cleaning up various driver sysfs permissions so we can 2014-06-11 16:09:14 -07:00
hsi hsi: omap_ssi_port: use normal module refcounting 2014-06-05 00:59:05 +02:00
hv Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
hwmon hwmon: vexpress: Use devm helper for hwmon device registration 2014-06-12 08:36:50 -07:00
hwspinlock
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i2c Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux into next 2014-06-06 12:26:57 -07:00
ide
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idle
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iio Staging driver patches for 3.16-rc1 2014-06-03 08:34:00 -07:00
infiniband Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2014-06-12 22:38:32 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-06-09 18:46:02 -07:00
iommu IOMMU Updates for Linux v3.16 2014-06-06 11:48:46 -07:00
ipack
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irqchip Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next 2014-06-04 15:59:13 -07:00
isdn isdn/capi: fix (middleware) device nodes 2014-06-04 23:13:41 -07:00
leds Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2014-06-12 13:08:09 -07:00
lguest
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macintosh
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mailbox
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mcb
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md . Add dm_accept_partial_bio interface to DM core to allow DM targets 2014-06-12 13:33:29 -07:00
media Merge branch 'topic/omap3isp' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2014-06-12 23:04:28 -07:00
memory
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memstick
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message
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mfd This pull-request contains some misplaced patches from Tony 2014-06-12 12:42:32 -07:00
misc Merge branch 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next 2014-06-03 15:48:23 -07:00
mmc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
mtd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-06-12 10:30:18 -07:00
net vxlan: Checksum fixes 2014-06-15 01:00:50 -07:00
nfc
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ntb
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nubus kernel/printk: use symbolic defines for console loglevels 2014-06-04 16:54:17 -07:00
of Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
oprofile
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parisc
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parport parport: convert use of typedef ctl_table to struct ctl_table 2014-06-06 16:08:15 -07:00
pci PCI: pciehp: Compute timeout from hotplug command start time 2014-06-17 15:26:11 -06:00
pcmcia
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phy
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pinctrl This is the bulk of pin control changes for the v3.16 2014-06-03 11:20:32 -07:00
platform Merge branch 'for_linus' of git://cavan.codon.org.uk/platform-drivers-x86 2014-06-10 16:58:32 -07:00
pnp Merge branches 'pnp', 'powercap', 'pm-runtime' and 'pm-opp' 2014-06-03 23:13:00 +02:00
power ACPI and power management updates for 3.16-rc1 2014-06-04 08:57:16 -07:00
powercap
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pps
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ps3
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ptp
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pwm pwm: Changes for v3.16-rc1 2014-06-11 14:06:55 -07:00
rapidio rapidio/tsi721: use pci_enable_msix_exact() instead of pci_enable_msix() 2014-06-06 16:08:13 -07:00
regulator Most of this is cleaning up various driver sysfs permissions so we can 2014-06-11 16:09:14 -07:00
remoteproc
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reset ARM: SoC driver changes 2014-06-02 16:35:49 -07:00
rpmsg
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rtc rtc: s5m: consolidate two device type switch statements 2014-06-10 15:34:47 -07:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
sbus
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scsi SCSI for-linus on 20140613 2014-06-14 19:49:48 -05:00
sfi
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sh SH Driver Update for v3.16 2014-06-06 11:44:09 -07:00
sn
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soc
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spi Merge remote-tracking branch 'spi/topic/workqueue' into spi-next 2014-06-02 17:08:43 +01:00
spmi
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ssb
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staging Merge branch 'topic/omap3isp' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2014-06-12 23:04:28 -07:00
target Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2014-06-12 22:38:32 -07:00
tc
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thermal Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2014-06-11 14:26:21 -07:00
tty Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
uio
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usb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
uwb
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vfio A handful of VFIO bug fixes for v3.16 2014-06-07 20:12:15 -07:00
vhost Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2014-06-12 22:38:32 -07:00
video This pull-request merely contains some very basic build/run-time bug fixes. 2014-06-12 12:45:50 -07:00
virt
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virtio
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vlynq
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vme
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w1 Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
watchdog watchdog: add Intel MID watchdog driver support 2014-06-10 21:48:16 +02:00
xen Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
zorro
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Kconfig
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Makefile Char / misc driver patches for 3.16-rc1 2014-06-03 08:06:56 -07:00