It is wrong to do --i in the for loop.
Fixes: dd02ea5a33 ("usb: gadget: mass_storage: Use static array for luns")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
IRQ_NOAUTOEN cannot be used with shared IRQs, since commit 04c848d398
("genirq: Warn when IRQ_NOAUTOEN is used with shared interrupts") and
kernel now throws a warn dump. But OMAP DWC3 driver uses this flag. As
per commit 12a7f17fac ("usb: dwc3: omap: fix race of pm runtime with
irq handler in probe") that introduced this flag, PM runtime can race
with IRQ handler when deferred probing happens due to extcon,
therefore IRQ_NOAUTOEN needs to be set so that irq is not enabled until
extcon is registered.
Remove setting of IRQ_NOAUTOEN and move the registration of
shared irq to a point after dwc3_omap_extcon_register() and
of_platform_populate(). This avoids possibility of probe deferring and
above said race condition.
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
commit f54edb539c ("usb: dwc3: core: initialize ULPI before trying to
get the PHY") moved call to dwc3_core_get_phy() from dwc3_probe() to
dwc3_core_init() after dwc3_core_soft_reset(). But
dwc3_core_soft_reset() calls phy_init(), therefore dwc3_core_get_phy()
needs to be called before dwc3_core_soft_reset().
Fix this by moving call to dwc3_core_get_phy() before
dwc3_core_soft_reset().
This fixes the following abort seen on DRA7xx platforms
[ 24.769118] usb usb2: SerialNumber: xhci-hcd.1.auto
[ 24.781144] hub 2-0:1.0: USB hub found
[ 24.787836] hub 2-0:1.0: 1 port detected
[ 24.809939] Unhandled fault: imprecise external abort (0x1406) at 0x00000000
Reported-by: Carlos Hernandez <ceh@ti.com>
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Allwinner A64 SoC features a R_INTC controller, which controls the NMI
line, and this interrupt line is usually connected to the AXP PMIC.
Add support for it.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
[wens@csie.org: Add fallback sun6i-a31-r-intc compatible]
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
In file included from include/linux/flat.h:13:0,
from fs/binfmt_flat.c:36:
arch/h8300/include/asm/flat.h: In function 'flat_get_addr_from_rp':
arch/h8300/include/asm/flat.h:28:3: error: expected ')' before 'val'
val &= 0x00ffffff;
^
arch/h8300/include/asm/flat.h:31:1: error: expected expression before '}' token
}
^
In file included from include/linux/flat.h:13:0,
from fs/binfmt_flat.c:36:
arch/h8300/include/asm/flat.h:26:6: warning: unused variable 'val' [-Wunused-variable]
u32 val = get_unaligned((__force u32 *)rp);
^
In file included from include/linux/flat.h:13:0,
from fs/binfmt_flat.c:36:
arch/h8300/include/asm/flat.h:31:1: warning: no return statement in function returning non-void [-Wreturn-type]
}
^
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Fixes: 468138d785 ("binfmt_flat: flat_{get,put}_addr_from_rp() should be able to fail")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Several variables had their types changed from unsigned long to u32, but
the arch-specific implementations of flat_set_persistent() weren't
updated, leading to compiler warnings on blackfin and m68k:
fs/binfmt_flat.c: In function ‘load_flat_file’:
fs/binfmt_flat.c:799: warning: passing argument 2 of ‘flat_set_persistent’ from incompatible pointer type
Fixes: 468138d785 ("binfmt_flat: flat_{get,put}_addr_from_rp() should be able to fail")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Several variables had their types changed from unsigned long to u32, but
the printk()-style format to print them wasn't updated, leading to:
fs/binfmt_flat.c: In function ‘load_flat_file’:
fs/binfmt_flat.c:577: warning: format ‘%ld’ expects type ‘long int’, but argument 3 has type ‘u32’
Fixes: 468138d785 ("binfmt_flat: flat_{get,put}_addr_from_rp() should be able to fail")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We deprecated the "num-slots" property now and plan to get
rid of it finally. Just move a step to cleanup it from DT.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
pcie_clkreqn actually doesn't work at all, so replace it with
pcie_clkreqn_cpm.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
The SdioAudio power domain includes the i2s/spdif/spi5/sdio.
So this patch adds the pd control for rk3399 i2s/spdif/spi5/sdio, in order
to save more power consumption.
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Rockchip's RK3328 evaluation board has one usb2 otg controller
and one usb2 host controller which consist of EHCI and OHCI.
Each usb controller connects with one usb2 phy port through
UTMI+ interface. Let's enable them to support usb2 on RK3328
evaluation board.
Signed-off-by: William Wu <william.wu@rock-chips.com>
[restructured enablement of u2phy subnodes]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Provide the dynamic power coefficient of the big and little CPU
clusters. These numbers are currently in use on the Samsung Chromebook
Plus ("Kevin").
The power allocator thermal governor doesn't know how to do anything if
it doesn't get power parameters from its cooling devices (in this case,
CPUfreq). So this effectively enables the power-allocator governor.
Signed-off-by: Brian Norris <briannorris@chromium.org>
[set the property in each core node]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
The Gru device tree currently contains entries for the regulators
ppvar_bigcpu, ppvar_litcpu, ppvar_gpu and ppvar_centerlogic; however,
the regulators have not been enabled, due to the lack of binding and driver
support for keeping the over-voltage protection (OVP) at bay and
preventing unintended regulator shutdowns on voltage downshifts.
Now, the vctrl regulator driver has been merged, along with new bindings
for asymmetric settling time. The driver is OVP aware, it splits larger
voltage decreases in multiple steps when necessary and adds required
delays.
This change renames each of the aforementioned regulators to
<orig_name>_pwm and adds a new vctrl regulator named <orig_name>.
The vctrl regulators use the voltage of their corresponding PWM regulator
as control voltage. The OVP related values are empirical and stem from
the Chrome OS kernel tree.
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Brian Norris <briannorris@chromium.org>
[fixed node names and parent supplies of gpu and centerlogic]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Gru derivatives besides Kevin have slightly different voltage ranges for
their CPU regulators. Let's keep the base Gru file accurate and let
Kevin override.
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
replace all occurrences of sdmcc with sdmmc in the arm64 rockchip
devicetree files.
Signed-off-by: Klaus Goger <klaus.goger@theobroma-systems.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
The binding specifies the actual implementations only (mali-t760
for example) but not the arm,mali-midgard used in some vendor kernels.
So drop that compatible property from the rk3288 where it had slipped in.
Also fix the node name which should be a generic gpu@...
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
The binding rightfully only specifies compatibles for actual implementations
and not for the whole family. In the example an arm,mali-midgard slipped
through from downstream devicetrees though. So drop that to not confuse
people reading (or copying) that example.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Rob Herring <robh@kernel.org>
Bug fix for the BAU tunable congested_cycles not being set to the user
defined value. Instead of referencing a global variable when deciding
on BAU shutdown, a node will reference its own tunable set
value ( cong_response_us). This results in the user set
tunable value congested_response_us taking effect correctly.
Signed-off-by: Justin Ernst <justin.ernst@hpe.com>
Acked-by: Andrew Banman <abanman@hpe.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: mike.travis@hpe.com
Cc: sivanich@hpe.com
Link: http://lkml.kernel.org/r/1499970803-282432-1-git-send-email-justin.ernst@hpe.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This old piece of code is supposed to measure the performance of indirect
calls to determine if the processor is buggy or not, however the compiler
optimizer turns it into a direct call.
Use the OPTIMIZER_HIDE_VAR() macro to thwart the optimization, so that a real
indirect call is generated.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/alpine.LRH.2.02.1707110737530.8746@file01.intranet.prod.int.rdu2.redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
fixed a typo issue in get_mxclk_freq() function.
the original code using PLL_CTRL_M_SHIFT for shifting to set N flag.
which is not right, it should be PLL_CTRL_N_SHIFT.
both PLL_CTRL_M_SHIFT and PLL_CTRL_N_SHIFT
defined in drivers/staging/sm750fb/ddk750_reg.h
Signed-off-by: Lynn Lei <lynnl.wit@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We were fixing checkpatch.pl warnings and accidentally reversed this
condition.
Fixes: 5b29aaaa1e ("staging: rtl8188eu: removes comparison to null")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If vchiq_debugfs_init() fails, then we accidentally return a valid
pointer casted to int on error. This code is simpler if we get rid of
the "ptr_err" variable and just use "err" throughout.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
As reported by Éric Piel on the Comedi mailing list (see
<https://groups.google.com/forum/#!topic/comedi_list/ueZiR7vTLOU/discussion>),
the analog output asynchronous commands are running too fast with a
period 50 ns shorter than it should be. This affects all boards with AO
command support that are supported by the "ni_pcimio", "ni_atmio", and
"ni_mio_cs" drivers.
This is a regression bug introduced by commit 080e6795cb ("staging:
comedi: ni_mio_common: Cleans up/clarifies ni_ao_cmd"), specifically,
this line in `ni_ao_cmd_set_update()`:
/* following line: N-1 per STC */
ni_stc_writel(dev, trigvar - 1, NISTC_AO_UI_LOADA_REG);
The `trigvar` variable value comes from a call to `ni_ns_to_timer()`
which converts a timer period in nanoseconds to a hardware divisor
value. The function already reduces the divisor by 1 as required by the
hardware, so the above line should not reduce it further by 1. Fix it
by replacing `trigvar` by `trigvar - 1` in the above line, and remove
the misleading comment.
Reported-by: Éric Piel <piel@delmic.com>
Fixes: 080e6795cb ("staging: comedi: ni_mio_common: Cleans up/clarifies ni_ao_cmd")
Cc: Éric Piel <piel@delmic.com>
Cc: Spencer E. Olson <olsonse@umich.edu>
Cc: <stable@vger.kernel.org> # 4.7+
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Doug Berger says:
====================
bcmgenet: Fragmented SKB corrections
Two issues were observed in a review of the bcmgenet driver support for
fragmented SKBs which are addressed by this patch set.
The first addresses a problem that could occur if the driver is not able
to DMA map a fragment of the SKB. This would be a highly unusual event
but it would leave the hardware descriptors in an invalid state which
should be prevented.
The second is a hazard that could occur if the driver is able to reclaim
the first control block of a fragmented SKB before all of its fragments
have completed processing by the hardware. In this case the SKB could
be freed leading to reuse of memory that is still in use by hardware.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Since the skb is attached to the first control block of a fragmented
skb it is possible that the skb could be freed when reclaiming that
control block before all fragments of the skb have been consumed by
the hardware and unmapped.
This commit introduces first_cb and last_cb pointers to the skb
control block used by the driver to keep track of which transmit
control blocks within a transmit ring are the first and last ones
associated with the skb.
It then splits the bcmgenet_free_cb() function into transmit
(bcmgenet_free_tx_cb) and receive (bcmgenet_free_rx_cb) versions
that can handle the unmapping of dma mapped memory and cleaning up
the corresponding control block structure so that the skb is only
freed after the last associated transmit control block is reclaimed.
Fixes: 1c1008c793 ("net: bcmgenet: add main driver file")
Signed-off-by: Doug Berger <opendmb@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In case we fail to map a single fragment, we would be leaving the
transmit ring populated with stale entries.
This commit introduces the helper function bcmgenet_put_txcb()
which takes care of rewinding the per-ring write pointer back to
where we left.
It also consolidates the functionality of bcmgenet_xmit_single()
and bcmgenet_xmit_frag() into the bcmgenet_xmit() function to
make the unmapping of control blocks cleaner.
Fixes: 1c1008c793 ("net: bcmgenet: add main driver file")
Suggested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Doug Berger <opendmb@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 07d4510f52 ("dt-bindings: net: bgmac: add bindings documentation for
bgmac") added both brcm,amac-nsp.txt and brcm,bgmac-nsp.txt. The former is
actually the one that got updated and is in use by the bgmac driver while the
latter is duplicating the former and is not used nor updated.
Fixes: 07d4510f52 ("dt-bindings: net: bgmac: add bindings documentation for bgmac")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Arvind Yadav says:
====================
Constify isdn pci_device_id's.
pci_device_id are not supposed to change at runtime. All functions
working with pci_device_id provided by <linux/pci.h> work with
const pci_device_id. So mark the non-const structs as const.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
pci_device_id are not supposed to change at runtime. All functions
working with pci_device_id provided by <linux/pci.h> work with
const pci_device_id. So mark the non-const structs as const.
File size before:
text data bss dec hex filename
11803 544 1 12348 303c isdn/hardware/avm/c4.o
File size After adding 'const':
text data bss dec hex filename
11931 416 1 12348 303c isdn/hardware/avm/c4.o
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
pci_device_id are not supposed to change at runtime. All functions
working with pci_device_id provided by <linux/pci.h> work with
const pci_device_id. So mark the non-const structs as const.
File size before:
text data bss dec hex filename
21656 1024 96 22776 58f8 isdn/hardware/mISDN/hfcpci.o
File size After adding 'const':
text data bss dec hex filename
22424 256 96 22776 58f8 isdn/hardware/mISDN/hfcpci.o
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
pci_device_id are not supposed to change at runtime. All functions
working with pci_device_id provided by <linux/pci.h> work with
const pci_device_id. So mark the non-const structs as const.
File size before:
text data bss dec hex filename
9963 1936 16 11915 2e8b isdn/hardware/mISDN/avmfritz.o
File size After adding 'const':
text data bss dec hex filename
10091 1808 16 11915 2e8b isdn/hardware/mISDN/avmfritz.o
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
pci_device_id are not supposed to change at runtime. All functions
working with pci_device_id provided by <linux/pci.h> work with
const pci_device_id. So mark the non-const structs as const.
File size before:
text data bss dec hex filename
13959 4080 24 18063 468f isdn/hardware/mISDN/w6692.o
File size After adding 'const':
text data bss dec hex filename
14087 3952 24 18063 468f isdn/hardware/mISDN/w6692.o
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
pci_device_id are not supposed to change at runtime. All functions
working with pci_device_id provided by <linux/pci.h> work with
const pci_device_id. So mark the non-const structs as const.
File size before:
text data bss dec hex filename
63450 1536 1492 66478 103ae isdn/hardware/mISDN/hfcmulti.o
File size After adding 'const':
text data bss dec hex filename
64698 288 1492 66478 103ae isdn/hardware/mISDN/hfcmulti.o
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
pci_device_id are not supposed to change at runtime. All functions
working with pci_device_id provided by <linux/pci.h> work with
const pci_device_id. So mark the non-const structs as const.
File size before:
text data bss dec hex filename
10941 1776 16 12733 31bd isdn/hardware/mISDN/netjet.o
File size After adding 'const':
text data bss dec hex filename
11005 1712 16 12733 31bd isdn/hardware/mISDN/netjet.o
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
pci_device_id are not supposed to change at runtime. All functions
working with pci_device_id provided by <linux/pci.h> work with
const pci_device_id. So mark the non-const structs as const.
File size before:
text data bss dec hex filename
6224 655 8 6887 1ae7 isdn/hardware/eicon/divasmain.o
File size After adding 'const':
text data bss dec hex filename
6608 271 8 6887 1ae7 isdn/hardware/eicon/divasmain.o
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
pci_device_id are not supposed to change at runtime. All functions
working with pci_device_id provided by <linux/pci.h> work with
const pci_device_id. So mark the non-const structs as const.
File size before:
text data bss dec hex filename
5989 576 0 6565 19a5 isdn/hisax/hisax_fcpcipnp.o
File size After adding 'const':
text data bss dec hex filename
6085 480 0 6565 19a5 isdn/hisax/hisax_fcpcipnp.o
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
pci_device_id are not supposed to change at runtime. All functions
working with pci_device_id provided by <linux/pci.h> work with
const pci_device_id. So mark the non-const structs as const.
File size before:
text data bss dec hex filename
10512 536 4 11052 2b2c drivers/isdn/hisax/hfc4s8s_l1.o
File size After adding 'const':
text data bss dec hex filename
10672 376 4 11052 2b2c drivers/isdn/hisax/hfc4s8s_l1.o
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
pci_device_id are not supposed to change at runtime. All functions
working with pci_device_id provided by <linux/pci.h> work with
const pci_device_id. So mark the non-const structs as const.
File size before:
text data bss dec hex filename
13686 2064 4416 20166 4ec6 drivers/isdn/hisax/config.o
File size After adding 'const':
text data bss dec hex filename
15030 720 4416 20166 4ec6 drivers/isdn/hisax/config.o
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch copies commit b7f8a09f80:
"btrfs: Don't clear SGID when inheriting ACLs" written by Jan.
Fixes: 073931017b
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit removes an extra inode_unlock() that is being done in function
f2fs_ioc_setflags error path. While there, get rid of a useless 'out'
label as well.
Fixes: 0abd675e97 ("f2fs: support plain user/group quota")
Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Add nodes of watchdog timer for UniPhier LD11 and LD20 SoC.
The watchdog timer is included in sysctrl.
Signed-off-by: Keiji Hayashibara <hayashibara.keiji@socionext.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
dwmmc driver deprecated num-slots and plan to get rid
of it finally. Just move a step to cleanup it from DT.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Jun Nie <jun.nie@linaro.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
gcc 7.1 complains that the driver uses sprintf() and thus does not validate
the length of output buffers.
drivers/hwmon/applesmc.c: In function 'applesmc_show_fan_position':
drivers/hwmon/applesmc.c:82:21: warning:
'%d' directive writing between 1 and 5 bytes into a region of size 4
Fix the problem by using scnprintf() instead of sprintf() throughout the
driver. Also explicitly limit the number of supported fans to avoid actual
buffer overruns and thus invalid keys.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Fixes the following behavior: for connections that had no RTT sample
at the time of initializing congestion control, BBR was initializing
the pacing rate to a high nominal rate (based an a guess of RTT=1ms,
in case this is LAN traffic). Then BBR never adjusted the pacing rate
downward upon obtaining an actual RTT sample, if the connection never
filled the pipe (e.g. all sends were small app-limited writes()).
This fix adjusts the pacing rate upon obtaining the first RTT sample.
Fixes: 0f8782ea14 ("tcp_bbr: add BBR congestion control")
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix a corner case noticed by Eric Dumazet, where BBR's setting
sk->sk_pacing_rate to 0 during initialization could theoretically
cause packets in the sending host to hang if there were packets "in
flight" in the pacing infrastructure at the time the BBR congestion
control state is initialized. This could occur if the pacing
infrastructure happened to race with bbr_init() in a way such that the
pacer read the 0 rather than the immediately following non-zero pacing
rate.
Fixes: 0f8782ea14 ("tcp_bbr: add BBR congestion control")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Introduce a helper to initialize the BBR pacing rate unconditionally,
based on the current cwnd and RTT estimate. This is a pure refactor,
but is needed for two following fixes.
Fixes: 0f8782ea14 ("tcp_bbr: add BBR congestion control")
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Introduce a helper to convert a BBR bandwidth and gain factor to a
pacing rate in bytes per second. This is a pure refactor, but is
needed for two following fixes.
Fixes: 0f8782ea14 ("tcp_bbr: add BBR congestion control")
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
