28 Sep, 2016
4 commits
-
CURRENT_TIME_SEC is not y2038 safe. current_time() will
be transitioned to use 64 bit time along with vfs in a
separate patch.
There is no plan to transistion CURRENT_TIME_SEC to use
y2038 safe time interfaces.current_time() will also be extended to use superblock
range checking parameters when range checking is introduced.This works because alloc_super() fills in the the s_time_gran
in super block to NSEC_PER_SEC.Signed-off-by: Deepa Dinamani
Acked-by: Jan Kara
Signed-off-by: Al Viro -
CURRENT_TIME macro is not appropriate for filesystems as it
doesn't use the right granularity for filesystem timestamps.
Use current_time() instead.CURRENT_TIME is also not y2038 safe.
This is also in preparation for the patch that transitions
vfs timestamps to use 64 bit time and hence make them
y2038 safe. As part of the effort current_time() will be
extended to do range checks. Hence, it is necessary for all
file system timestamps to use current_time(). Also,
current_time() will be transitioned along with vfs to be
y2038 safe.Note that whenever a single call to current_time() is used
to change timestamps in different inodes, it is because they
share the same time granularity.Signed-off-by: Deepa Dinamani
Reviewed-by: Arnd Bergmann
Acked-by: Felipe Balbi
Acked-by: Steven Whitehouse
Acked-by: Ryusuke Konishi
Acked-by: David Sterba
Signed-off-by: Al Viro -
proc uses new_inode_pseudo() to allocate a new inode.
This in turn calls the proc_inode_alloc() callback.
But, at this point, inode is still not initialized
with the super_block pointer which only happens just
before alloc_inode() returns after the call to
inode_init_always().Also, the inode times are initialized again after the
call to new_inode_pseudo() in proc_inode_alloc().
The assignemet in proc_alloc_inode() is redundant and
also doesn't work after the current_time() api is
changed to take struct inode* instead of
struct *super_block.This bug was reported after current_time() was used to
assign times in proc_alloc_inode().Signed-off-by: Deepa Dinamani
Reported-by: Fengguang Wu [0-day test robot]
Reviewed-by: Arnd Bergmann
Signed-off-by: Al Viro -
current_fs_time() is used for inode timestamps.
Change the signature of the function to take inode pointer
instead of superblock as per Linus's suggestion.Also, move the api under vfs as per the discussion on the
thread: https://lkml.org/lkml/2016/6/9/36 . As per Arnd's
suggestion on the thread, changing the function name.current_fs_time() will be deleted after all the references
to it are replaced by current_time().There was a bug reported by kbuild test bot with the change
as some of the calls to current_time() were made before the
super_block was initialized. Catch these accidental assignments
as timespec_trunc() does for wrong granularities. This allows
for the function to work right even in these circumstances.
But, adds a warning to make the user aware of the bug.A coccinelle script was used to identify all the current
.alloc_inode super_block callbacks that updated inode timestamps.
proc filesystem was the only one that was modifying inode times
as part of this callback. The series includes a patch to fix that.Note that timespec_trunc() will also be moved to fs/inode.c
in a separate patch when this will need to be revamped for
bounds checking purposes.Signed-off-by: Deepa Dinamani
Reviewed-by: Arnd Bergmann
Signed-off-by: Al Viro
12 Sep, 2016
4 commits
-
Commit aa71987472a9 ("nvme: fabrics drivers don't need the nvme-pci
driver") removed the dependency on BLK_DEV_NVME, but the cdoe does
depend on the block layer (which used to be an implicit dependency
through BLK_DEV_NVME).Otherwise you get various errors from the kbuild test robot random
config testing when that happens to hit a configuration with BLOCK
device support disabled.Cc: Christoph Hellwig
Cc: Jay Freyensee
Cc: Sagi Grimberg
Signed-off-by: Linus Torvalds -
Pull IIO fixes from Greg KH:
"Here are a few small IIO fixes for 4.8-rc6.Nothing major, full details are in the shortlog, all of these have
been in linux-next with no reported issues"* tag 'staging-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
iio:core: fix IIO_VAL_FRACTIONAL sign handling
iio: ensure ret is initialized to zero before entering do loop
iio: accel: kxsd9: Fix scaling bug
iio: accel: bmc150: reset chip at init time
iio: fix pressure data output unit in hid-sensor-attributes
tools:iio:iio_generic_buffer: fix trigger-less mode -
Pull USB fixes from Greg KH:
"Here are some small USB gadget, phy, and xhci fixes for 4.8-rc6.All of these resolve minor issues that have been reported, and all
have been in linux-next with no reported issues"* tag 'usb-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: chipidea: udc: fix NULL ptr dereference in isr_setup_status_phase
xhci: fix null pointer dereference in stop command timeout function
usb: dwc3: pci: fix build warning on !PM_SLEEP
usb: gadget: prevent potenial null pointer dereference on skb->len
usb: renesas_usbhs: fix clearing the {BRDY,BEMP}STS condition
usb: phy: phy-generic: Check clk_prepare_enable() error
usb: gadget: udc: renesas-usb3: clear VBOUT bit in DRD_CON
Revert "usb: dwc3: gadget: always decrement by 1"
11 Sep, 2016
3 commits
-
Pull libnvdimm fixes from Dan Williams:
"nvdimm fixes for v4.8, two of them are tagged for -stable:- Fix devm_memremap_pages() to use track_pfn_insert(). Otherwise,
DAX pmd mappings end up with an uncached pgprot, and unusable
performance for the device-dax interface. The device-dax interface
appeared in 4.7 so this is tagged for -stable.- Fix a couple VM_BUG_ON() checks in the show_smaps() path to
understand DAX pmd entries. This fix is tagged for -stable.- Fix a mis-merge of the nfit machine-check handler to flip the
polarity of an if() to match the final version of the patch that
Vishal sent for 4.8-rc1. Without this the nfit machine check
handler never detects / inserts new 'badblocks' entries which
applications use to identify lost portions of files.- For test purposes, fix the nvdimm_clear_poison() path to operate on
legacy / simulated nvdimm memory ranges. Without this fix a test
can set badblocks, but never clear them on these ranges.- Fix the range checking done by dax_dev_pmd_fault(). This is not
tagged for -stable since this problem is mitigated by specifying
aligned resources at device-dax setup time.These patches have appeared in a next release over the past week. The
recent rebase you can see in the timestamps was to drop an invalid fix
as identified by the updated device-dax unit tests [1]. The -mm
touches have an ack from Andrew"[1]: "[ndctl PATCH 0/3] device-dax test for recent kernel bugs"
https://lists.01.org/pipermail/linux-nvdimm/2016-September/006855.html* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
libnvdimm: allow legacy (e820) pmem region to clear bad blocks
nfit, mce: Fix SPA matching logic in MCE handler
mm: fix cache mode of dax pmd mappings
mm: fix show_smap() for zone_device-pmd ranges
dax: fix mapping size check -
Pull i2c fixes from Wolfram Sang:
"Mostly driver bugfixes, but also a few cleanups which are nice to have
out of the way"* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: rk3x: Restore clock settings at resume time
i2c: Spelling s/acknowedge/acknowledge/
i2c: designware: save the preset value of DW_IC_SDA_HOLD
Documentation: i2c: slave-interface: add note for driver development
i2c: mux: demux-pinctrl: run properly with multiple instances
i2c: bcm-kona: fix inconsistent indenting
i2c: rcar: use proper device with dma_mapping_error
i2c: sh_mobile: use proper device with dma_mapping_error
i2c: mux: demux-pinctrl: invalidate properly when switching fails -
Pull fscrypto fixes fromTed Ts'o:
"Fix some brown-paper-bag bugs for fscrypto, including one one which
allows a malicious user to set an encryption policy on an empty
directory which they do not own"* tag 'for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
fscrypto: require write access to mount to set encryption policy
fscrypto: only allow setting encryption policy on directories
fscrypto: add authorization check for setting encryption policy
10 Sep, 2016
18 commits
-
Since setting an encryption policy requires writing metadata to the
filesystem, it should be guarded by mnt_want_write/mnt_drop_write.
Otherwise, a user could cause a write to a frozen or readonly
filesystem. This was handled correctly by f2fs but not by ext4. Make
fscrypt_process_policy() handle it rather than relying on the filesystem
to get it right.Signed-off-by: Eric Biggers
Cc: stable@vger.kernel.org # 4.1+; check fs/{ext4,f2fs}
Signed-off-by: Theodore Ts'o
Acked-by: Jaegeuk Kim -
The FS_IOC_SET_ENCRYPTION_POLICY ioctl allowed setting an encryption
policy on nondirectory files. This was unintentional, and in the case
of nonempty regular files did not behave as expected because existing
data was not actually encrypted by the ioctl.In the case of ext4, the user could also trigger filesystem errors in
->empty_dir(), e.g. due to mismatched "directory" checksums when the
kernel incorrectly tried to interpret a regular file as a directory.This bug affected ext4 with kernels v4.8-rc1 or later and f2fs with
kernels v4.6 and later. It appears that older kernels only permitted
directories and that the check was accidentally lost during the
refactoring to share the file encryption code between ext4 and f2fs.This patch restores the !S_ISDIR() check that was present in older
kernels.Signed-off-by: Eric Biggers
Cc: stable@vger.kernel.org
Signed-off-by: Theodore Ts'o -
On an ext4 or f2fs filesystem with file encryption supported, a user
could set an encryption policy on any empty directory(*) to which they
had readonly access. This is obviously problematic, since such a
directory might be owned by another user and the new encryption policy
would prevent that other user from creating files in their own directory
(for example).Fix this by requiring inode_owner_or_capable() permission to set an
encryption policy. This means that either the caller must own the file,
or the caller must have the capability CAP_FOWNER.(*) Or also on any regular file, for f2fs v4.6 and later and ext4
v4.8-rc1 and later; a separate bug fix is coming for that.Signed-off-by: Eric Biggers
Cc: stable@vger.kernel.org # 4.1+; check fs/{ext4,f2fs}
Signed-off-by: Theodore Ts'o -
Bad blocks can be injected via /sys/block/pmemN/badblocks. In a situation
where legacy pmem is being used or a pmem region created by using memmap
kernel parameter, the injected bad blocks are not cleared due to
nvdimm_clear_poison() failing from lack of ndctl function pointer. In
this case we need to just return as handled and allow the bad blocks to
be cleared rather than fail.Reviewed-by: Vishal Verma
Signed-off-by: Dave Jiang
Signed-off-by: Dan Williams -
The check for a 'pmem' type SPA in the MCE handler was inverted due to a
merge/rebase error.Fixes: 6839a6d nfit: do an ARS scrub on hitting a latent media error
Cc: linux-acpi@vger.kernel.org
Cc: Dan Williams
Signed-off-by: Vishal Verma
Signed-off-by: Dan Williams -
track_pfn_insert() in vmf_insert_pfn_pmd() is marking dax mappings as
uncacheable rendering them impractical for application usage. DAX-pte
mappings are cached and the goal of establishing DAX-pmd mappings is to
attain more performance, not dramatically less (3 orders of magnitude).track_pfn_insert() relies on a previous call to reserve_memtype() to
establish the expected page_cache_mode for the range. While memremap()
arranges for reserve_memtype() to be called, devm_memremap_pages() does
not. So, teach track_pfn_insert() and untrack_pfn() how to handle
tracking without a vma, and arrange for devm_memremap_pages() to
establish the write-back-cache reservation in the memtype tree.Cc:
Cc: Matthew Wilcox
Cc: Ross Zwisler
Cc: Nilesh Choudhury
Cc: Kirill A. Shutemov
Reported-by: Toshi Kani
Reported-by: Kai Zhang
Acked-by: Andrew Morton
Signed-off-by: Dan Williams -
Attempting to dump /proc//smaps for a process with pmd dax mappings
currently results in the following VM_BUG_ONs:kernel BUG at mm/huge_memory.c:1105!
task: ffff88045f16b140 task.stack: ffff88045be14000
RIP: 0010:[] [] follow_trans_huge_pmd+0x2cb/0x340
[..]
Call Trace:
[] smaps_pte_range+0xa0/0x4b0
[] ? vsnprintf+0x255/0x4c0
[] __walk_page_range+0x1fe/0x4d0
[] walk_page_vma+0x62/0x80
[] show_smap+0xa6/0x2b0kernel BUG at fs/proc/task_mmu.c:585!
RIP: 0010:[] [] smaps_pte_range+0x499/0x4b0
Call Trace:
[] ? vsnprintf+0x255/0x4c0
[] __walk_page_range+0x1fe/0x4d0
[] walk_page_vma+0x62/0x80
[] show_smap+0xa6/0x2b0These locations are sanity checking page flags that must be set for an
anonymous transparent huge page, but are not set for the zone_device
pages associated with dax mappings.Cc: Ross Zwisler
Cc: Kirill A. Shutemov
Acked-by: Andrew Morton
Signed-off-by: Dan Williams -
Pull virtio fixes from Michael Tsirkin:
"This includes a couple of bugfixs for virtio.The virtio console patch is actually also in x86/tip targeting 4.9
because it helps vmap stacks, but it also fixes IOMMU_PLATFORM which
was added in 4.8, and it seems important not to ship that in a broken
configuration"* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
virtio_console: Stop doing DMA on the stack
virtio: mark vring_dma_dev() static -
Pull power management fixes from Rafael Wysocki:
"This includes a PM QoS framework fix from Tejun to prevent interrupts
from being enabled unexpectedly during early boot and a cpufreq
documentation fix.Specifics:
- If the PM QoS framework invokes cancel_delayed_work_sync() during
early boot, it will enable interrupts which is not expected at that
point, so prevent it from happening (Tejun Heo)- Fix cpufreq statistic documentation to follow a recent change in
behavior that forgot to update it as appropriate (Jean Delvare)"* tag 'pm-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq-stats: Minor documentation fix
PM / QoS: avoid calling cancel_delayed_work_sync() during early boot -
* pm-core-fixes:
PM / QoS: avoid calling cancel_delayed_work_sync() during early boot* pm-cpufreq-fixes:
cpufreq-stats: Minor documentation fix -
Pull GPIO fixes from Linus Walleij:
"Some GPIO fixes that have been boiling the last two weeks or so.
Nothing special, I'm trying to sort out some Kconfig business and
Russell needs a fix in for -his SA1100 rework.Summary:
- Revert a pointless attempt to add an include to solve the UM allyes
compilation problem.- Make the mcp23s08 depend on OF_GPIO as it uses it and doesn't
compile properly without it.- Fix a probing problem for ucb1x00"
* tag 'gpio-v4.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: sa1100: fix irq probing for ucb1x00
gpio: mcp23s08: make driver depend on OF_GPIO
Revert "gpio: include in gpiolib-of" -
Pull fuse fix from Miklos Szeredi:
"This fixes a deadlock when fuse, direct I/O and loop device are
combined"* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: direct-io: don't dirty ITER_BVEC pages -
Pull overlayfs fix from Miklos Szeredi:
"This fixes a regression caused by the last pull request"* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
ovl: fix workdir creation -
Pull btrfs fixes from Chris Mason:
"I'm not proud of how long it took me to track down that one liner in
btrfs_sync_log(), but the good news is the patches I was trying to
blame for these problems were actually fine (sorry Filipe)"* 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
btrfs: introduce tickets_id to determine whether asynchronous metadata reclaim work makes progress
btrfs: remove root_log_ctx from ctx list before btrfs_sync_log returns
btrfs: do not decrease bytes_may_use when replaying extents -
Pull sound fixes from Takashi Iwai:
"We've got quite a few fixes at this time, and all are stable patches.syzkaller strikes back again (episode 19 or so), and we had to plug
some holes in ALSA core part (mostly timer).In addition, a couple of FireWire audio fixes for the invalid copy
user calls in locks, and a few quirks for HD-audio and USB-audio as
usual are included"* tag 'sound-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: rawmidi: Fix possible deadlock with virmidi registration
ALSA: timer: Fix zero-division by continue of uninitialized instance
ALSA: timer: fix NULL pointer dereference in read()/ioctl() race
ALSA: fireworks: accessing to user space outside spinlock
ALSA: firewire-tascam: accessing to user space outside spinlock
ALSA: hda - Enable subwoofer on Dell Inspiron 7559
ALSA: hda - Add headset mic quirk for Dell Inspiron 5468
ALSA: usb-audio: Add sample rate inquiry quirk for B850V3 CP2114
ALSA: timer: fix NULL pointer dereference on memory allocation failure
ALSA: timer: fix division by zero after SNDRV_TIMER_IOCTL_CONTINUE -
virtio_console uses a small DMA buffer for control requests. Move
that buffer into heap memory.Doing virtio DMA on the stack is normally okay on non-DMA-API virtio
systems (which is currently most of them), but it breaks completely
if the stack is virtually mapped.Tested by typing both directions using picocom aimed at /dev/hvc0.
Signed-off-by: Andy Lutomirski
Signed-off-by: Michael S. Tsirkin
Reviewed-by: Amit Shah -
We get 1 warning when building kernel with W=1:
drivers/virtio/virtio_ring.c:170:16: warning: no previous prototype for 'vring_dma_dev' [-Wmissing-prototypes]In fact, this function is only used in the file in which it is
declared and don't need a declaration, but can be made static.
so this patch marks this function with 'static'.Signed-off-by: Baoyou Xie
Acked-by: Arnd Bergmann
Signed-off-by: Michael S. Tsirkin -
Pull arm64 fixes from Catalin Marinas:
- smp_mb__before_spinlock() changed to smp_mb() on arm64 since the
generic definition to smp_wmb() is not sufficient- avoid a recursive loop with the graph tracer by using using
preempt_(enable|disable)_notrace in _percpu_(read|write)* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: use preempt_disable_notrace in _percpu_read/write
arm64: spinlocks: implement smp_mb__before_spinlock() as smp_mb()
09 Sep, 2016
11 commits
-
Pull powerpc fixes from Michael Ellerman:
"Fixes marked for stable:
- Don't alias user region to other regions below PAGE_OFFSET from
Paul Mackerras
- Fix again csum_partial_copy_generic() on 32-bit from Christophe
Leroy
- Fix corrupted PE allocation bitmap on releasing PE from Gavin ShanFixes for code merged this cycle:
- Fix crash on releasing compound PE from Gavin Shan
- Fix processor numbers in OPAL ICP from Benjamin Herrenschmidt
- Fix little endian build with CONFIG_KEXEC=n from Thiago Jung
Bauermann"* tag 'powerpc-4.8-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/mm: Don't alias user region to other regions below PAGE_OFFSET
powerpc/32: Fix again csum_partial_copy_generic()
powerpc/powernv: Fix corrupted PE allocation bitmap on releasing PE
powerpc/powernv: Fix crash on releasing compound PE
powerpc/xics/opal: Fix processor numbers in OPAL ICP
powerpc/pseries: Fix little endian build with CONFIG_KEXEC=n -
Pull ARM fixes from Russell King:
"A few ARM fixes:- Robin Murphy noticed that the non-secure privileged entry was
relying on undefined behaviour, which needed to be fixed.- Vladimir Murzin noticed that prov-v7 fails to build for MMUless
configurations because a required header file wasn't included.- A bunch of fixes for StrongARM regressions found while testing
4.8-rc on such platforms"* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: sa1100: clear reset status prior to reboot
ARM: 8600/1: Enforce some NS-SVC initialisation
ARM: 8599/1: mm: pull asm/memory.h explicitly
ARM: sa1100: register clocks early
ARM: sa1100: fix 3.6864MHz clock -
…balbi/usb into usb-linus
Felipe writes:
usb: fixes for v4.8-rc6
Unfortunately we have a bogus dwc3 patch leaked through the cracks and
got merged into Linus' HEAD. That patch ended up causing off-by-1 error
in our TRB accounting logic. Thankfully John Youn found out the problem
and we provided a revert to the bogus dwc3 patch in no time.Apart from this off-by-1 error, we have two fixes to the Renesas drivers,
a small fix to our generic phy driver, a NULL pointer dereference fix for
f_eem and a build warning fix in dwc3. -
…er.chen/usb into usb-linus
Peter writes:
Fix the possible kernel panic when the hardware signal is bad for chipidea udc.
-
…jic23/iio into staging-linus
Jonathan writes:
Second set of IIO fixes for the 4.8 cycle.
We have a big rework of the kxsd9 driver queued up behind the fix below and
a fix for a recent fix that was marked for stable.
Hence this fix series is perhaps a little more urgent than average for IIO.
* core
- a fix for a fix in the last set. The recent fix for blocking ops when
! task running left a path (unlikely one) in which the function return
value was not set - so initialise it to 0.
- The IIO_TYPE_FRACTIONAL code previously didn't cope with negative
fractions. Turned out a fix for this was in Analog's tree but hadn't made
it upstream.
* bmc150
- reset chip at init time. At least one board out there ends up coming up
in an unstable state due to noise during power up. The reset does no
harm on other boards.
* kxsd9
- Fix a bug in the reported scaling due to failing to set the integer
part to 0.
* hid-sensors-pressure
- Output was in the wrong units to comply with the IIO ABI.
* tools
- iio_generic_buffer: Fix the trigger-less mode by ensuring we don't fault
out for having no trigger when we explicitly said we didn't want to have
one. -
When debug preempt or preempt tracer is enabled, preempt_count_add/sub()
can be traced by function and function graph tracing, and
preempt_disable/enable() would call preempt_count_add/sub(), so in Ftrace
subsystem we should use preempt_disable/enable_notrace instead.In the commit 345ddcc882d8 ("ftrace: Have set_ftrace_pid use the bitmap
like events do") the function this_cpu_read() was added to
trace_graph_entry(), and if this_cpu_read() calls preempt_disable(), graph
tracer will go into a recursive loop, even if the tracing_on is
disabled.So this patch change to use preempt_enable/disable_notrace instead in
this_cpu_read().Since Yonghui Yang helped a lot to find the root cause of this problem,
so also add his SOB.Signed-off-by: Yonghui Yang
Signed-off-by: Chunyan Zhang
Acked-by: Will Deacon
Signed-off-by: Catalin Marinas -
smp_mb__before_spinlock() is intended to upgrade a spin_lock() operation
to a full barrier, such that prior stores are ordered with respect to
loads and stores occuring inside the critical section.Unfortunately, the core code defines the barrier as smp_wmb(), which
is insufficient to provide the required ordering guarantees when used in
conjunction with our load-acquire-based spinlock implementation.This patch overrides the arm64 definition of smp_mb__before_spinlock()
to map to a full smp_mb().Cc:
Cc: Peter Zijlstra
Reported-by: Alan Stern
Signed-off-by: Will Deacon
Signed-off-by: Catalin Marinas -
Problems with the signal integrity of the high speed USB data lines or
noise on reference ground lines can cause the i.MX6 USB controller to
violate USB specs and exhibit unexpected behavior.It was observed that USBi_UI interrupts were triggered first and when
isr_setup_status_phase was called, ci->status was NULL, which lead to a
NULL pointer dereference kernel panic.This patch fixes the kernel panic, emits a warning once and returns
-EPIPE to halt the device and let the host get stalled.
It also adds a comment to point people, who are experiencing this issue,
to their USB hardware design.Cc: #4.1+
Signed-off-by: Clemens Gruber
Signed-off-by: Peter Chen -
The cpufreq-stats code can no longer be built as a module, so it now
appears with square brackets in menuconfig.Signed-off-by: Jean Delvare
Fixes: 1aefc75b2449 (cpufreq: stats: Make the stats code non-modular)
Acked-by: Viresh Kumar
Signed-off-by: Rafael J. Wysocki -
Depending on a number of factors including:
- Which exact Rockchip SoC we're working with
- How deep we suspend
- Which i2c port we're onWe might lose the state of the i2c registers at suspend time.
Specifically we've found that on rk3399 the i2c ports that are not in
the PMU power domain lose their state with the current suspend depth
configured by ARM Tursted Firmware.Note that there are very few actual i2c registers that aren't configured
per transfer anyway so all we actually need to re-configure are the
clock config registers. We'll just add a call to rk3x_i2c_adapt_div()
at resume time and be done with it.NOTE: On rk3399 on ports whose power was lost, I put printouts in at
resume time. I saw things like:
before: con=0x00010300, div=0x00060006
after: con=0x00010200, div=0x00180025Signed-off-by: Douglas Anderson
Reviewed-by: David Wu
Tested-by: David Wu
[wsa: removed duplicate const]
Signed-off-by: Wolfram Sang -
Signed-off-by: Geert Uytterhoeven
Signed-off-by: Wolfram Sang
