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The lock is held, we make the same lookup that previously failed with
EEXIST and we don't insert NULL pointers.
Signed-off-by: David Sterba <dsterba@suse.com>
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Originally, the eb and start were passed separately in case eb is NULL.
Since the readahead has been refactored in 4.6, this is not true anymore
and we can get rid of the parameter.
Signed-off-by: David Sterba <dsterba@suse.com>
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'start' is not used since "btrfs: reada: Pass reada_extent into
__readahead_hook directly" (6e39dbe8b9e55280c).
Signed-off-by: David Sterba <dsterba@suse.com>
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We can't touch the eb directly in case the function is called with a
non-zero error, so we can read the eb level when needed.
Signed-off-by: David Sterba <dsterba@suse.com>
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The helpers are not meant to be generic, the name is misleading. Convert
them to static inlines for type checking.
Signed-off-by: David Sterba <dsterba@suse.com>
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Signed-off-by: David Sterba <dsterba@suse.com>
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Signed-off-by: David Sterba <dsterba@suse.com>
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Fixes: ("btrfs: update btrfs_space_info's bytes_may_use timely")
Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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They're not even documented anywhere, letting users with no recourse but
to RTFS. It's no big burden to output the bitfield as words.
Also, display unknown flags as hex.
Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Tested-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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My QEMU VM was seeing inexplicable I/O errors that I tracked down to
errors coming from the qcow2 virtual drive in the host system. The qcow2
file is a nocow file on my Btrfs drive, which QEMU opens with O_DIRECT.
Every once in awhile, pread() or pwrite() would return EEXIST, which
makes no sense. This turned out to be a bug in btrfs_get_extent().
Commit 8dff9c853410 ("Btrfs: deal with duplciates during extent_map
insertion in btrfs_get_extent") fixed a case in btrfs_get_extent() where
two threads race on adding the same extent map to an inode's extent map
tree. However, if the added em is merged with an adjacent em in the
extent tree, then we'll end up with an existing extent that is not
identical to but instead encompasses the extent we tried to add. When we
call merge_extent_mapping() to find the nonoverlapping part of the new
em, the arithmetic overflows because there is no such thing. We then end
up trying to add a bogus em to the em_tree, which results in a EEXIST
that can bubble all the way up to userspace.
Fix it by extending the identical extent map special case.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Tickets_id's name may result in some misunderstandings, it just indicates
the next ticket will be handled and is not stored per ticket.
Fixes: ce12965 ("btrfs: introduce tickets_id to determine whether
asynchronous metadata reclaim work makes progress")
Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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The DT binding for tildc is not consistent with the driver code: there
are two options - 'max-width' and 'max-pixelclock' specified in the
documentation which are parsed as 'ti,max-width' and
'ti,max-pixelclock' respectively.
Make the driver code consistent with the binding.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Jyri Sarha <jsarha@ti.com>
Signed-off-by: Jyri Sarha <jsarha@ti.com>
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We should wait for the last frame to complete before shutting things
down also on LCDC rev 1.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
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GCC 5 generates different code for this bootwrapper null check that
causes the PS3 to hang very early in its bootup. This check is of
limited value, so just get rid of it.
Cc: stable@vger.kernel.org
Signed-off-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Now that we've defined structures to describe each of the client
architecture vectors, we can use those to construct the value we pass to
firmware.
This avoids the tricks we previously played with the W() macro, allows
us to properly endian annotate fields, and should help to avoid bugs
introduced by failing to have the correct number of zero pad bytes
between fields.
It also means we can avoid hard coding IBM_ARCH_VEC_NRCORES_OFFSET in
order to update the max_cpus value and instead just set it.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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The "client architecture vectors" are a series of structures we pass to
firmware to define various things, such as what processors we support
and many other options.
Each structure is entirely different so we have to define a different
struct for each one, but that's OK.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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This has not made its way to a PAPR release yet, but we have an hcall
number assigned.
H_SIGNAL_SYS_RESET = 0x380
Syntax:
hcall(uint64 H_SIGNAL_SYS_RESET, int64 target);
Generate a system reset NMI on the threads indicated by target.
Values for target:
-1 = target all online threads including the caller
-2 = target all online threads except for the caller
All other negative values: reserved
Positive values: The thread to be targeted, obtained from the value
of the "ibm,ppc-interrupt-server#s" property of the CPU in the OF
device tree.
Semantics:
- Invalid target: return H_Parameter.
- Otherwise: Generate a system reset NMI on target thread(s),
return H_Success.
This will be used by crash/debug code to get stuck CPUs into a known
state.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Configure video mode to HW in enable() call back. There is no reason
to do it before that. This makes PM functions way easier because there
is no HW context to save when screen is for instance blanked. This
patch removes mode_set_nofb() call back from tilcdc.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
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Load palette at the end of mode_set_nofb(). Moving the palette loading
to mode_set_nofb() saves us from storing and restoring of framebuffer
addresses in dma registers that were just recently written there.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
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Add timeout wait for palette loadind to complete. We do not want to
hang forever if palette loaded interrupt does not arrive for some
reason.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
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The LCDC revision 2 documentation also mentions the mandatory palette
for true color modes. Even if the rev 2 LCDC appears to work just fine
without the palette being loaded loading it helps in testing the
feature.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
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Set LCDC_PALETTE_LOAD_MODE bit-field with new tilcdc_write_mask()
instead of tilcdc_set(). Setting a bit-fields with tilcdc_set() is
fundamentally broken.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
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Add tilcdc_write_mask() for handling register field wider than one bit
and mask values for those fields.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
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Failed tilcdc_crtc_create() error handling was broken, this patch
should fix it.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
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Revision 1 of the IP doesn't work if we don't load the palette (even
if it's not used, which is the case for the RGB565 format).
Add a function called from tilcdc_crtc_enable() which performs all
required actions if we're dealing with a rev1 chip.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
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Revision 1 LCDC support also sync lost errors and can benefit from
sync lost recovery routine.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
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Adds drm bride support for attaching drm bridge drivers to tilcdc. The
decision whether a video port leads to an external encoder or bridge
is made simply based on remote device's compatible string. The code
has been tested with BeagleBone-Black with and without BeagleBone
DVI-D Cape Rev A3 using ti-tfp410 driver.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
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Add very basic ti-tfp410 DVI transmitter driver. The only feature
separating this from a completely dummy bridge is the EDID read
support trough DDC I2C. Even that functionality should be in a
separate generic connector driver. However, because of missing DRM
infrastructure support the connector is implemented within the bridge
driver. Some tfp410 HW specific features may be added later if needed,
because there is a set of registers behind i2c if it is connected.
This implementation is tested against my new tilcdc bridge support
and it works with BeagleBone DVI-D Cape Rev A3. A DT binding document
is also updated.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
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Move "ti,tfp410.txt" from display/ti to display/bridge before adding
generic (non omapdrm/dss specific) implementation and new features.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
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Enable CONFIG_KEXEC_FILE in powernv_defconfig, ppc64_defconfig and
pseries_defconfig.
It depends on CONFIG_CRYPTO_SHA256=y, so add that as well.
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Define the Kconfig symbol so that the kexec_file_load() code can be
built, and wire up the syscall so that it can be called.
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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This purgatory implementation is based on the versions from kexec-tools
and kexec-lite, with additional changes.
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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This patch adds the support code needed for implementing
kexec_file_load() on powerpc.
This consists of functions to load the ELF kernel, either big or little
endian, and setup the purgatory enviroment which switches from the first
kernel to the second kernel.
None of this code is built yet, as it depends on CONFIG_KEXEC_FILE which
we have not yet defined. Although we could define CONFIG_KEXEC_FILE in
this patch, we'd then have a window in history where the kconfig symbol
is present but the syscall is not, which would be awkward.
Signed-off-by: Josh Sklar <sklar@linux.vnet.ibm.com>
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Commit 2965faa5e03d ("kexec: split kexec_load syscall from kexec core
code") introduced CONFIG_KEXEC_CORE so that CONFIG_KEXEC means whether
the kexec_load system call should be compiled-in and CONFIG_KEXEC_FILE
means whether the kexec_file_load system call should be compiled-in.
These options can be set independently from each other.
Since until now powerpc only supported kexec_load, CONFIG_KEXEC and
CONFIG_KEXEC_CORE were synonyms. That is not the case anymore, so we
need to make a distinction. Almost all places where CONFIG_KEXEC was
being used should be using CONFIG_KEXEC_CORE instead, since
kexec_file_load also needs that code compiled in.
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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kexec_locate_mem_hole will be used by the PowerPC kexec_file_load
implementation to find free memory for the purgatory stack.
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Acked-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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This is done to simplify the kexec_add_buffer argument list.
Adapt all callers to set up a kexec_buf to pass to kexec_add_buffer.
In addition, change the type of kexec_buf.buffer from char * to void *.
There is no particular reason for it to be a char *, and the change
allows us to get rid of 3 existing casts to char * in the code.
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Allow architectures to specify a different memory walking function for
kexec_add_buffer. x86 uses iomem to track reserved memory ranges, but
PowerPC uses the memblock subsystem.
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Recover from sync lost error flood by resetting the LCDC instead of
turning off the SYNC_LOST error IRQ. When LCDC starves on limited
memory bandwidth it may sometimes result an error situation when the
picture may have shifted couple of pixels to right and SYNC_LOST
interrupt is generated on every frame. LCDC main reset recovers from
this situation and causes a brief blanking on the screen.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
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Fix the following Calltrace:
[ 77.768221] WARNING: CPU: 5 PID: 645 at drivers/dma/dmaengine.c:1069 dma_async_device_unregister+0xe2/0xf0
[ 77.775058] dma_async_device_unregister called while 1 clients hold a reference
[ 77.825048] CPU: 5 PID: 645 Comm: sh Not tainted 4.8.8-WR9.0.0.0_standard+ #3
[ 77.832550] Hardware name: Intel Corp. Aspen Cove/Server, BIOS HAVLCRB1.X64.0012.D58.1604140405 04/14/2016
[ 77.840396] 0000000000000000 ffffc90008adbc80 ffffffff81403456 ffffc90008adbcd0
[ 77.848245] 0000000000000000 ffffc90008adbcc0 ffffffff8105e2e1 0000042d08adbf20
[ 77.855934] ffff88046a861c18 ffff88046a85c420 ffffffff820d4200 ffff88046ae92318
[ 77.863601] Call Trace:
[ 77.871113] [<ffffffff81403456>] dump_stack+0x4f/0x69
[ 77.878655] [<ffffffff8105e2e1>] __warn+0xd1/0xf0
[ 77.886102] [<ffffffff8105e34f>] warn_slowpath_fmt+0x4f/0x60
[ 77.893508] [<ffffffff814187a9>] ? find_next_bit+0x19/0x20
[ 77.900730] [<ffffffff814bf83e>] ? dma_channel_rebalance+0x23e/0x270
[ 77.907814] [<ffffffff814bfee2>] dma_async_device_unregister+0xe2/0xf0
[ 77.914992] [<ffffffff814c53aa>] hsu_dma_remove+0x1a/0x60
[ 77.921977] [<ffffffff814ee14c>] dnv_exit+0x1c/0x20
[ 77.928752] [<ffffffff814edff6>] mid8250_remove+0x26/0x40
[ 77.935607] [<ffffffff8144f1b9>] pci_device_remove+0x39/0xc0
[ 77.942292] [<ffffffff8160cfea>] __device_release_driver+0x9a/0x140
[ 77.948836] [<ffffffff8160d0b3>] device_release_driver+0x23/0x30
[ 77.955364] [<ffffffff81447dcc>] pci_stop_bus_device+0x8c/0xa0
[ 77.961769] [<ffffffff81447f0a>] pci_stop_and_remove_bus_device_locked+0x1a/0x30
[ 77.968113] [<ffffffff81450d4e>] remove_store+0x5e/0x70
[ 77.974267] [<ffffffff81607ed8>] dev_attr_store+0x18/0x30
[ 77.980243] [<ffffffff8123006a>] sysfs_kf_write+0x3a/0x50
[ 77.986180] [<ffffffff8122f5ab>] kernfs_fop_write+0x10b/0x190
[ 77.992118] [<ffffffff811bf1c8>] __vfs_write+0x18/0x40
[ 77.998032] [<ffffffff811bfdee>] vfs_write+0xae/0x190
[ 78.003747] [<ffffffff811c1016>] SyS_write+0x46/0xb0
[ 78.009234] [<ffffffff81a4c31b>] entry_SYSCALL_64_fastpath+0x13/0x8f
[ 78.014809] ---[ end trace 0c36dd73b7408eb2 ]---
This happens when the 8250 serial controller is hotplugged as follows:
echo 1 > /sys/bus/pci/devices/0000:00:1a.0/remove
This trace happens due to the serial port still holding a reference when
the dma device is unregistered.
The dma unregister routine will check if there is still a reference exist,
if so it will give the WARNING(here serial port still was not unregister).
To fix this, We need to unregister the serial port first, then do DMA
device unregister to make sure there is no reference when to DMA routine.
Signed-off-by: Liwei Song <liwei.song@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The function we are wrapping is named dma_alloc_noncoherent, and
not dma_alloc_non_coherent.
Fixes: 9ac7849e35f70 ("devres: device resource management")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The new driver caused a rare randconfig failure:
drivers/auxdisplay/ht16k33.o:(.data.ht16k33_fb_ops+0xc): undefined reference to `fb_sys_read'
drivers/auxdisplay/ht16k33.o:(.data.ht16k33_fb_ops+0x10): undefined reference to `fb_sys_write'
This selects the respective helper modules.
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Robin van der Gracht <robin@protonic.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The CBC encryption routine should use the encryption round keys, not
the decryption round keys.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Add support for following AEAD algos.
GCM,CCM,RFC4106,RFC4309,authenc(hmac(shaXXX),cbc(aes)).
Reviewed-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Harsh Jain <harsh@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Move request specific data in request context.
Signed-off-by: Harsh Jain <harsh@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Use SHASH_DESC_ON_STACK macro to allocate memory for ipad/opad
calculation.
Signed-off-by: Harsh Jain <harsh@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Destination buffer size passed to hardware should not be greater
than crypto operation output.
Signed-off-by: Harsh Jain <harsh@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Move reverse round key calculation logic in setkey operation.
Signed-off-by: Harsh Jain <harsh@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Remove malloc/free in hash operation and allocate
memory in chcr_ahash_req_ctx structure.
Signed-off-by: Jitendra Lulla <JLULLA@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Fixes 324429d74127, Unchecked dereference inside function.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jitendra Lulla <JLULLA@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Added new structure chcr_wr to populate Work Request Header.
Signed-off-by: Jitendra Lulla <JLULLA@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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