An assortment of non-functional lines are removed to reduce confusion
and some typos in comments are corrected.
Signed-off-by: Doug Berger <opendmb@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
A 2's complement subtraction will always do a borrow, so masking
off the sign bits is the same as conditionally adding (mask+1).
Signed-off-by: Doug Berger <opendmb@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit adds support for the internal fast ethernet 10/100 PHY
found in the BCM7260, BCM7268, and BCM7271 devices.
Signed-off-by: Doug Berger <opendmb@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The macros MDIO_AN_EEE_ADV_100TX and MDIO_AN_EEE_ADV_1000T are now
considered obsolete and are replaced in the kernel with the generic
macros MDIO_EEE_100TX and MDIO_EEE_1000T respectively.
Signed-off-by: Doug Berger <opendmb@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This fixes the following warning when building with clang and
CONFIG_DMA_ENGINE_RAID=n :
drivers/dma/dmaengine.c:1102:11: error: array index 2 is past the end of the array (which contains 1 element) [-Werror,-Warray-bounds]
return &unmap_pool[2];
^ ~
drivers/dma/dmaengine.c:1083:1: note: array 'unmap_pool' declared here
static struct dmaengine_unmap_pool unmap_pool[] = {
^
drivers/dma/dmaengine.c:1104:11: error: array index 3 is past the end of the array (which contains 1 element) [-Werror,-Warray-bounds]
return &unmap_pool[3];
^ ~
drivers/dma/dmaengine.c:1083:1: note: array 'unmap_pool' declared here
static struct dmaengine_unmap_pool unmap_pool[] = {
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The SDMA hardware/driver does not actually report the transfer residue at
burst size granularity, but in fact is only able to report residue after
each finished segment.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The dgnc_tty_send_break() has a switch-case condition for msec.
It is no use except case -1.
Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The bd variables in functions are already assigned from
ch->ch_bd but it is not used in those functions except checking NULL.
The ch->ch_bd could be replaced with bd variable.
Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
add Roy Pledge as maintainer of DPIO
Signed-off-by: Roy Pledge <Roy.Pledge@nxp.com>
Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The DPIO driver registers with the fsl-mc bus to handle bus-related
events for DPIO objects. Key responsibility is mapping I/O
regions, setting up interrupt handlers, and calling the DPIO
service initialization during probe.
Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Signed-off-by: Haiying Wang <haiying.wang@nxp.com>
Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The DPIO service interface handles initialization of DPIO objects
and exports APIs to be used by other DPAA2 object drivers to perform
queuing and buffer management related operations. The service allows
registration of callbacks when frames or notifications are received.
Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Signed-off-by: Haiying Wang <haiying.wang@nxp.com>
Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add QBman APIs for frame queue and buffer pool operations.
Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Signed-off-by: Haiying Wang <haiying.wang@nxp.com>
Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Create header for global dpaa2 definitions. Add definitions
for dequeue results.
Signed-off-by: Roy Pledge <Roy.Pledge@nxp.com>
Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add global definitions for DPAA2 frame descriptors and scatter
gather entries.
Signed-off-by: Roy Pledge <Roy.Pledge@nxp.com>
Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add the command build/parse APIs for operating on DPIO objects through
the DPAA2 Management Complex.
Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
add document describing the dpio driver and it's role, components
and major interfaces
Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Passing "serial" as name during request_irq() results in all serial port
irqs have same name. This does not help much to easily identify which
irq belongs to which serial port instance. Therefore pass dev_name()
during request_irq() so that better identifiable name is listed for
serial ports in cat /proc/interrupts output.
Output of cat /proc/interrupts
Before this patch:
26: 689 0 GICv2 309 Edge serial
After this patch:
26: 696 0 GICv2 309 Edge 2530c00.serial
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.
Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Without this fix, raid6 performance will not be optimal.
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Return value check of atomic_dec_if_positive is required as it returns
old value minus one. Without this fix, driver will send small ios to
firmware path and that will be a performance issue.
Not critical, but good to have r1_ldio_hint as default value in sdev
private.
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Without this fix, driver will enable INTx Interrupt pin even though
MSI-x vectors are enabled. See below lspci output. DisINTx is unset for
MSIx setup.
lspci -s 85:00.0 -vvv |grep INT |grep Control
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR+ FastB2B- DisINTx-
After applying this fix, driver will enable INTx Interrupt pin only if
Legacy interrupt method is required. See below lspci output. DisINTx is
set for MSIx setup. lspci -s 85:00.0 -vvv |grep INT |grep Control
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR+ FastB2B- DisINTx+
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
atmel_serial.h is only used by atmel_serial.c, so there's no need for
it to lie in include/linux.
Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
struct cache is only used in suspend/resume. Exclude it when PM is not
selected.
Suggested-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The samx7 family uses the same UART/USART IP as the at91/sama5 families but
has 8 of those.
Suggested-by: Szemző András <sza@esh.hu>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch fixes an issue that kernel panic happens when DMA is enabled
and we press enter key while the kernel booting on the serial console.
* An interrupt may occur after sci_request_irq().
* DMA transfer area is initialized by setup_timer() in sci_request_dma()
and used in interrupt.
If an interrupt occurred between sci_request_irq() and setup_timer() in
sci_request_dma(), DMA transfer area has not been initialized yet.
So, this patch changes the order of sci_request_irq() and
sci_request_dma().
Fixes: 73a19e4c03 ("serial: sh-sci: Add DMA support.")
Signed-off-by: Takatoshi Akiyama <takatoshi.akiyama.kj@ps.hitachi-solutions.com>
[Shimoda changes the commit log]
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The original patch makes the condition always true, so it is wrong.
It masks (but not fixes) the bug described in the commit message
but introduces a regression (no console is selected by SPCR)
in regular (no 'console=ttyAMA') case.
s/||/&&/ would not fix the problem as the root cause was identified
incorrectly.
This reverts commit aea9a80ba9.
Signed-off-by: Aleksey Makarov <aleksey.makarov@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In the functions intel_pstate_hwp_set(), min/max range from HWP capability
MSR along with max_perf_pct and min_perf_pct, is used to set the HWP
request MSR. In some cases this doesn't result in the correct HWP max/min
in HWP request.
For example: In the following case:
HWP capabilities from MSR 0x771
0x70a1220
Here cpufreq min/max frequencies from above MSR dump are 700MHz and 3.2GHz
respectively.
This will result in
hwp_min = 0x07
hwp_max = 0x20
To limit max frequency to 2GHz:
perf_limits->max_perf_pct = 63 (2GHz as a percent of 3.2GHz rounded up)
With the current calculation:
adj_range = max_perf_pct * range / 100;
adj_range = 63 * (32 - 7) / 100
adj_range = 15
max = hw_min + adj_range;
max = 7 + 15 = 22
This will result in HWP request of 0x160f, which will result in a
frequency cap of 2.2GHz not 2GHz.
The problem with the above calculation is that hwp_min of 7 is treated
as 0% in the range. But max_perf_pct is calculated with respect to minimum
as 0 and max as 3.2GHz or hwp_max, so adding hwp_min to it will result in
more than the desired.
Since the min_perf_pct and max_perf_pct is already a percent of max
frequency or hwp_max, this min/max HWP request value can be calculated
directly applying these percentage to hwp_max.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
For Qualcomm Technologies QDF2400 SOCs that are affected by erratum E44,
the ACPI oem_revision field is actually set to 1, not 0.
Fixes: d8a4995bce ("tty: pl011: Work around QDF2400 E44 stuck BUSY bit")
Tested-by: Manoj Iyer <manoj.iyer@canonical.com>
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The main item is the addition of the Power9 Machine Check handler. This was
delayed to make sure some details were correct, and is as minimal as possible.
The rest is small fixes, two for the Power9 PMU, two dealing with obscure
toolchain problems, two for the PowerNV IOMMU code (used by VFIO), and one to
fix a crash on 32-bit machines with macio devices due to missing dma_ops.
Thanks to:
Alexey Kardashevskiy, Cyril Bur, Larry Finger, Madhavan Srinivasan, Nicholas
Piggin.
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Merge tag 'powerpc-4.11-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull some more powerpc fixes from Michael Ellerman:
"The main item is the addition of the Power9 Machine Check handler.
This was delayed to make sure some details were correct, and is as
minimal as possible.
The rest is small fixes, two for the Power9 PMU, two dealing with
obscure toolchain problems, two for the PowerNV IOMMU code (used by
VFIO), and one to fix a crash on 32-bit machines with macio devices
due to missing dma_ops.
Thanks to:
Alexey Kardashevskiy, Cyril Bur, Larry Finger, Madhavan Srinivasan,
Nicholas Piggin"
* tag 'powerpc-4.11-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/64s: POWER9 machine check handler
powerpc/64s: allow machine check handler to set severity and initiator
powerpc/64s: fix handling of non-synchronous machine checks
powerpc/pmac: Fix crash in dma-mapping.h with NULL dma_ops
powerpc/powernv/ioda2: Update iommu table base on ownership change
powerpc/powernv/ioda2: Gracefully fail if too many TCE levels requested
selftests/powerpc: Replace stxvx and lxvx with stxvd2x/lxvd2x
powerpc/perf: Handle sdar_mode for marked event in power9
powerpc/perf: Fix perf_get_data_addr() for power9 DD1
powerpc/boot: Fix zImage TOC alignment
Commit 6a171b2993 ("serial: 8250_dw: Allow hardware flow control to be
used") recently broke the 8250_dw driver on platforms which don't select
HAVE_CLK, as dw8250_set_termios() gets confused by the behaviour of the
fallback HAVE_CLK=n clock API in linux/clk.h which pretends everything
is fine but returns (valid) NULL clocks and 0 HZ clock rates.
That 0 rate is written into the uartclk resulting in a crash at boot,
e.g. on Cavium Octeon III based UTM-8 we get something like this:
1180000000800.serial: ttyS0 at MMIO 0x1180000000800 (irq = 41, base_baud = 25000000) is a OCTEON
------------[ cut here ]------------
WARNING: CPU: 2 PID: 1 at drivers/tty/serial/serial_core.c:441 uart_get_baud_rate+0xfc/0x1f0
...
Call Trace:
...
[<ffffffff8149c2e4>] uart_get_baud_rate+0xfc/0x1f0
[<ffffffff814a5098>] serial8250_do_set_termios+0xb0/0x440
[<ffffffff8149c710>] uart_set_options+0xe8/0x190
[<ffffffff814a6cdc>] serial8250_console_setup+0x84/0x158
[<ffffffff814a11ec>] univ8250_console_setup+0x54/0x70
[<ffffffff811901a0>] register_console+0x1c8/0x418
[<ffffffff8149f004>] uart_add_one_port+0x434/0x4b0
[<ffffffff814a1af8>] serial8250_register_8250_port+0x2d8/0x440
[<ffffffff814aa620>] dw8250_probe+0x388/0x5e8
...
The clock API is defined such that NULL is a valid clock handle so it
wouldn't be right to check explicitly for NULL. Instead treat a
clk_round_rate() return value of 0 as an error which prevents uartclk
being overwritten.
Fixes: 6a171b2993 ("serial: 8250_dw: Allow hardware flow control to be used")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: linux-serial@vger.kernel.org
Cc: linux-clk@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: bcm-kernel-feedback-list@broadcom.com
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Jason Uy <jason.uy@broadcom.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
clk_round_rate returns a signed long and may possibly return errors
in it, for example if there is no possible rate.
Till now dw8250_set_termios ignored any error, the signednes and would
just use the value as input to clk_set_rate. This of course falls apart
if there is an actual error, so check for errors and only try to set
a rate if the value is actually valid.
This turned up on some Rockchip platforms after commit
6a171b2993 ("serial: 8250_dw: Allow hardware flow control to be used")
enabled set_termios callback in all cases, not only ACPI.
Fixes: 6a171b2993 ("serial: 8250_dw: Allow hardware flow control to be used")
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The check to see if cd is null is redundant, pdata->channels is
never null at this point, and hence &pdata->channels[i] cannot
be null, so remove the null check.
Detected by CoverityScan, CID#1357194 ("Logically Dead Code")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
[resend due to me forgetting to cc: linux-api the first time around I
posted these back on Feb 23]
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
For some reason these values are not in the uapi header file, so any
libc has to define it themselves. To prevent them from needing to do
this, just have the kernel provide the correct values.
Reported-by: Elliott Hughes <enh@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[resend due to me forgetting to cc: linux-api the first time around I
posted these back on Feb 23]
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When userspace tries to use these defines, it complains that it needs to
be an unsigned 1 that is shifted, so libc implementations have to create
their own version. Fix this by defining it properly so that libcs can
just use the kernel uapi header.
Reported-by: Elliott Hughes <enh@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Code may be refactored to take advantage of previous patches which
reduced the level of indentation. Function parameter line breaks can
be adjusted in line with kernel coding standards.
Refactor layout of function call parameters. Make whitespace changes
only.
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Checkpatch emits WARNING: Too many leading tabs - consider code
refactoring. One level of indentation may be removed by inverting an
if statement conditional (and returning if new conditional evaluates
to true). Code contains switch statement that also contains multiple
layers of indentation. Indentation may be reduced by breaking out of
the case statement in multiple places instead of guarding code with
if/else statements.
Invert conditional. Return original error code if new conditional
evaluates to true. Break out of case blocks instead of using
if/else. Do not modify program logic.
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Checkpatch emits WARNING: single byte memset is suspicious. Swapped
2nd/3rd argument? Call site in question is correct but is an unusual
use of memset() to zero a single byte. The same can be achieved by
assigning 0 directly to the memory location.
Dereference pointer and assign 0 to that memory location. Use '\0' to
make explicit that it is a char pointer.
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Return value from kmalloc() does not require a cast.
Remove unnecessary cast.
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Checkpatch emits WARNING: else is not generally useful after a break
or return. Two warnings of this type are emitted, both are the result
of a else statement after a return statement. The 'else' can safely be
removed.
Remove unnecessary else statement.
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Checkpatch emits WARNING: Comparisons should place the constant on the
right side of the test.
Move constant to right hand side of test, modify operator to ensure
logic is maintained.
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Checkpatch emits CHECK: multiple assignments should be avoided.
Move multiple assignment onto separate lines. Fix comment to use more
natural English.
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Checkpatch emits CHECK: Alignment should match open parenthesis. This
is due to commented out code.
Remove commented out (dead) code.
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Checkpatch emits CHECK: Logical continuations should be on the
previous line.
Move logical continuation to previous line.
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Checkpatch emits over 100 instances of CHECK: No space is necessary
after a cast.
Remove unnecessary space.
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Driver mixes spelling michael and michel in symbol names and
comments. Michael here references the IEEE 802.11i Message Integrity
Code. It is incorrect to spell it michel and confusing having two
spellings for the same thing.
Change michel -> micheal in both symbol names and comments.
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
