Put a small comment before assigning IRQ_WAKE_THREAD
telling us what is going on.
Cc: Russell King <linux@armlinux.org.uk>
Cc: Yann Gautier <yann.gautier@foss.st.com>
Cc: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210921143359.1738149-1-linus.walleij@linaro.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
ADMA is only available on controller instances that are connected to the
L3 interconnect and are bus mastering capable.
As the MMCHS_HL_HWINFO is in the module registers before omap registers
and sdhci registers, and the omap registers and sdhci registers can be
at different offsets depending on the SoC, let's read MMCHS_HL_HWINFO
directly.
Let's also switch to using device_property_present() while at it.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20210921110029.21944-6-tony@atomide.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
We need to support the legacy ti,non-removable property too. Let's warn
about the legacy property and mark the device as non-removable.
Naturally all the mainline kernel devicetree files will get updated to use
the standard non-removable property with the sdhci-omap conversion. But we
also have folks updating their kernels with custom devicetree files that
we need to consider.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20210921110029.21944-5-tony@atomide.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
The sysconfig register is managed in a generic way by PM runtime for us by
the interconnect target module layer code. SDHCI_RESET_ALL also resets the
target module configuration, so we need to restore sysconfig after reset.
Note that there is no need to save and restore sysconfig during PM runtime,
the PM runtime layer will do that for us.
Not sure if this issue is a problem with the current configurations, I
noticed the issue while adding support for older TI SoCs and testing with
wlcore SDIO wlan device.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20210921110029.21944-4-tony@atomide.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
We need to restore context in a specified order with HCTL set in two
phases. This is similar to what omap_hsmmc_context_restore() is doing.
Otherwise SDIO can stop working on resume.
And for PM runtime and SDIO cards, we need to also save SYSCTL, IE and
ISE.
This should not be a problem currently, and these patches can be applied
whenever suitable.
Fixes: ee0f309263 ("mmc: sdhci-omap: Add Support for Suspend/Resume")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20210921110029.21944-3-tony@atomide.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
If sdhci-omap is configured for an unused device instance and the device
is not set as disabled, we can get a NULL pointer dereference:
Unable to handle kernel NULL pointer dereference at virtual address
00000045
...
(regulator_set_voltage) from [<c07d7008>] (mmc_regulator_set_ocr+0x44/0xd0)
(mmc_regulator_set_ocr) from [<c07e2d80>] (sdhci_set_ios+0xa4/0x490)
(sdhci_set_ios) from [<c07ea690>] (sdhci_omap_set_ios+0x124/0x160)
(sdhci_omap_set_ios) from [<c07c8e94>] (mmc_power_up.part.0+0x3c/0x154)
(mmc_power_up.part.0) from [<c07c9d20>] (mmc_start_host+0x88/0x9c)
(mmc_start_host) from [<c07cad34>] (mmc_add_host+0x58/0x7c)
(mmc_add_host) from [<c07e2574>] (__sdhci_add_host+0xf0/0x22c)
(__sdhci_add_host) from [<c07eaf68>] (sdhci_omap_probe+0x318/0x72c)
(sdhci_omap_probe) from [<c06a39d8>] (platform_probe+0x58/0xb8)
AFAIK we are not seeing this with the devices configured in the mainline
kernel but this can cause issues for folks bringing up their boards.
Fixes: 7d326930d3 ("mmc: sdhci-omap: Add OMAP SDHCI driver")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20210921110029.21944-2-tony@atomide.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
According to JEDEC Spec, there is no need to do tuning under HS400 mode
since the Rx signal is aligned with the DS signal. However, MediaTek's IC
need set its "DS delay" internally to ensure it can latch Rx signal
correctly.
In previous version, We provide an "hs400-ds-delay" in device tree to cover
different chipset/PCB design, and it works fine in most cases. But, with
the development of process technology and the big VCore voltage scale
range(may have 0.7V/0.6V/0.55V), it is difficult to find a suitable
"hs400-ds-delay" to cover all of IC corner cases(SSSS/TTTT/FFFF). So that
We must have the ability to do hs400 online tuning.
Signed-off-by: Wenbin Mei <wenbin.mei@mediatek.com>
Reviewed-by: Chaotian Jing <chaotian.jing@mediatek.com>
Link: https://lore.kernel.org/r/20210917124803.22871-4-wenbin.mei@mediatek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This adds a ->execute_hs400_tuning() host callback to enable optional
support for host specific tuning for eMMC HS400 mode. Additionally, share
mmc_get_ext_csd() through the public host headerfile, to allow it to be
used by the host drivers, which is needed to support the HS400 tuning.
Signed-off-by: Wenbin Mei <wenbin.mei@mediatek.com>
Link: https://lore.kernel.org/r/20210917124803.22871-3-wenbin.mei@mediatek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
The MODULE_DEVICE_TABLE already creates proper alias for platform
driver. Having another MODULE_ALIAS causes the alias to be duplicated.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsunhg.com>
Link: https://lore.kernel.org/r/20210916170511.137915-1-krzysztof.kozlowski@canonical.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Only wait for DRTO on reads, otherwise the driver hangs.
The driver prevents sending CMD12 on response errors like CRCs. According
to the comment this is because some cards have problems with this during
the UHS tuning sequence. Unfortunately this workaround currently also
applies for any command with data. On reads this will set the drto timer,
which then triggers after a while. On writes this will not set any timer
and the tasklet will not be scheduled again.
I cannot test for the UHS workarounds need, but even if so, it should at
most apply to reads. I have observed many hangs when CMD25 response
contained a CRC error. This patch fixes this without touching the actual
UHS tuning workaround.
Signed-off-by: Christian Loehle <cloehle@hyperstone.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/af8f8b8674ba4fcc9a781019e4aeb72c@hyperstone.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
As noted in the "Deprecated Interfaces, Language Features, Attributes,
and Conventions" documentation [1], size calculations (especially
multiplication) should not be performed in memory allocator (or similar)
function arguments due to the risk of them overflowing. This could lead
to values wrapping around and a smaller allocation being made than the
caller was expecting. Using those allocations could lead to linear
overflows of heap memory and other misbehaviors.
So, use the struct_size() helper to do the arithmetic instead of the
argument "size + count * size" in the kzalloc() function.
[1] https://www.kernel.org/doc/html/v5.14/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments
Signed-off-by: Len Baker <len.baker@gmx.com>
Link: https://lore.kernel.org/r/20210911131933.2089-1-len.baker@gmx.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Intel Thunder Bay SoC eMMC controller is based on Arasan
eMMC 5.1 host controller IP
Signed-off-by: Rashmi A <rashmi.a@intel.com>
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20210829182443.30802-2-rashmi.a@intel.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Use the helper macro SET_RUNTIME_PM_OPS() instead of the verbose
operators ".runtime_suspend/.runtime_resume", because the
SET_RUNTIME_PM_OPS() is a nice helper macro that could be brought
in to make code a little more concise.
Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Link: https://lore.kernel.org/r/20210907025940.1535-1-caihuoqing@baidu.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
We never checked for errors on add_disk() as this function returned void.
Now that this is fixed, use the shiny new error handling.
Contrary to the typical removal which delays the put_disk() until later,
since we are failing on a probe we immediately put the disk on failure from
add_disk by using blk_cleanup_disk().
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/20210902174105.2418771-4-mcgrof@kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
We never checked for errors on add_disk() as this function returned void.
Now that this is fixed, use the shiny new error handling.
Contrary to the typical removal which delays the put_disk() until later,
since we are failing on a probe we immediately put the disk on failure from
add_disk by using blk_cleanup_disk().
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/20210902174105.2418771-3-mcgrof@kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
MMC Cards can have an optional Device Tree binding to add
non-discoverable properties.
Now that we have the DT validation in place, let's convert the device
tree bindings for that driver over to a YAML schema.
Some of these properties were already described in the MMC controller
binding, even though they are not generic and do not apply to any
device, so we took the occasion to fix this.
Cc: linux-mmc@vger.kernel.org
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210901091852.479202-31-maxime@cerno.tech
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
We never checked for errors on add_disk() as this function returned void.
Now that this is fixed, use the shiny new error handling.
The caller only cleanups the disk if we pass on an allocated md but on
error we return return ERR_PTR(ret), and so we must do all the unwinding
ourselves.
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/20210830212538.148729-5-mcgrof@kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
The mmc_request structure(*mrq) is not used. //msdc_cmd_find_resp
I remove the unnecessary code related to the mmc_request structure.
Signed-off-by: ChanWoo Lee <cw9316.lee@samsung.com>
Link: https://lore.kernel.org/r/20210827093119.32481-1-cw9316.lee@samsung.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
We found this issue on a 5G platform, during CMDQ error handling, if DMA
status is active when it call msdc_reset_hw(), it means mmc host hw reset
and DMA transfer will be parallel, mmc host may access sram region
unexpectedly. According to the programming guide of mtk-sd host, it needs
to wait for dma stop done after set dma stop.
This change should be applied to all SoCs.
Signed-off-by: Derong Liu <derong.liu@mediatek.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210827071537.1034-1-derong.liu@mediatek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Patch adds support to include Sampled Instruction Address Register
(SIAR) and Sampled Data Address Register (SDAR) SPRs as part of extended
registers. Update the definition of PERF_REG_PMU_MASK_300/31 and
PERF_REG_EXTENDED_MAX to include these SPR's.
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Reviewed-by: Daniel Axtens <dja@axtens.net>
Reviewed-by: Kajol Jain<kjain@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211007065505.27809-4-atrajeev@linux.vnet.ibm.com
PERF_REG_PMU_MASK_300 and PERF_REG_PMU_MASK_31 defines the mask
value for extended registers. Current definition of these mask values
uses hex constant and does not use registers by name, making it less
readable. Patch refactor the macro values by or'ing together the actual
register value constants. Also include PERF_REG_EXTENDED_MAX as
part of enum definition.
Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Reviewed-by: Kajol Jain<kjain@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211007065505.27809-2-atrajeev@linux.vnet.ibm.com
Return an error code if usb_get_function() fails. Don't return success.
Fixes: 4bc8a33f24 ("usb: gadget: hid: convert to new interface of f_hid")
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20211011123739.GC15188@kili
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
update the comments of kallsyms support.
Fixes: af73d78bd3 ("kbuild: Remove debug info from kallsyms linking")
Signed-off-by: Hui Su <suhui_kernel@163.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
The device may take up to 100ms to become responsive during probe, so
prefer asynchronous probing to avoid delaying the rest of the system.
Suggested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: John Keeping <john@metanate.com>
Link: https://lore.kernel.org/r/20211007111217.1935858-1-john@metanate.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
I have a ST1633 touch controller which fails to probe due to a timeout
waiting for the controller to become ready. Increasing the minimum
delay to 100ms ensures that the probe sequence completes successfully.
The ST1633 datasheet says nothing about the maximum delay here and the
ST1232 I2C protocol document says "wait until" with no notion of a
timeout.
Since this only runs once during probe, being generous with the timout
seems reasonable and most likely the device will become ready
eventually.
(It may be worth noting that I saw this issue with a PREEMPT_RT patched
kernel which probably has tighter wakeups from usleep_range() than other
preemption models.)
Fixes: f605be6a57 ("Input: st1232 - wait until device is ready before reading resolution")
Signed-off-by: John Keeping <john@metanate.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20210929152609.2421483-1-john@metanate.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The clocks in the example use 'SCLK_DDRCLK', which does not exist in
the rk3399-cru.h, correct it to 'SCLK_DDRC'.
Ref: commit 7fbdfcd687 ("clk: rockchip: add SCLK_DDRC id for rk3399 ddrc")
Fixes: c1ceb8f7c1 ("Documentation: bindings: add dt documentation for rk3399 dmc")
Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
Link: https://lore.kernel.org/r/20211001150024.18672-1-amadeus@jmu.edu.cn
Signed-off-by: Rob Herring <robh@kernel.org>
Add support for PCIe SATA expander cards based on ASMedia 1062 + JBM575
controllers.
These cards can provide up to 10 or more SATA ports on one PCIe card.
Signed-off-by: István Pongrácz <pongracz.istvan@gmail.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
The last byte of "pad" is used without being initialized.
Fixes: 55dba3120f ("libata: update ->data_xfer hook for ATAPI")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
* Fix a new crash on dev file close if the dev file was opened when
GPU is not loaded (such as missing fw in initrd)
* Switch to single drm_sched_entity per priority level per drm_file
to unbreak multi-context userspace
* Serialize GMU access to fix GMU OOB errors
* Various error path fixes
* A couple integer overflow fixes
* Fix mdp5 cursor plane WARNs
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rob Clark <robdclark@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/CAF6AEGtD4u7yyiy+BQLmibUCbn=AdDRu7FrmdViHVx0QrcGf8g@mail.gmail.com
This disables a lock which wasn't enabled and it does not disable
the first lock in the array.
Fixes: 6e0eb52eba ("drm/msm/dsi: Parse bus clocks from a list")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20211001123409.GG2283@kili
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Return an error code if msm_dsi_manager_validate_current_config().
Don't return success.
Fixes: 8b03ad30e3 ("drm/msm/dsi: Use one connector for dual DSI mode")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20211001123308.GF2283@kili
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
The downstream driver models this PLL lock check as an if-elseif-else.
The only way to reach the else case where pll_locked=true [1] is by
succeeding both readl_poll_timeout_atomic calls (which return zero on
success) in the if _and_ elseif condition. Hence both the "lock" and
"ready" bit need to be tested in the SM_READY_STATUS register before
considering the PLL locked and ready to go.
Tested on the Sony Xperia XA2 Ultra (nile-discovery, sdm630).
[1]: https://source.codeaurora.org/quic/la/kernel/msm-4.19/tree/drivers/clk/qcom/mdss/mdss-dsi-pll-14nm-util.c?h=LA.UM.9.2.1.r1-08000-sdm660.0#n302
Fixes: f079f6d999 ("drm/msm/dsi: Add PHY/PLL for 8x96")
Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210906202552.824598-1-marijn.suijten@somainline.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
The commit 9f91f22aaf ("drm/msm/dsi: remove duplicate fields from
dsi_pll_Nnm instances") mistakenly changed registered clock names. While
the platform is in progress of migration to using clock properties in
the dts rather than the global clock names, we should provide backwards
compatibility. Thus restore registerd global clock names.
Fixes: 9f91f22aaf ("drm/msm/dsi: remove duplicate fields from dsi_pll_Nnm instances")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Link: https://lore.kernel.org/r/20210921162245.1858118-1-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Both PINGPONG4 and PINGPONG5 IRQ registers are using the
same address, which is incorrect. PINGPONG4 should use the
register offset 30, and PINGPONG5 should use the register
offset 31 according to the downstream driver.
Fixes: 667e9985ee ("drm/msm/dpu: replace IRQ lookup with the data in hw catalog")
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210819133636.2045766-1-robert.foss@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Since commit 98659487b8 ("drm/msm: add support to take dpu snapshot")
the following NULL pointer dereference is seen on i.MX53:
[ 3.275493] msm msm: bound 30000000.gpu (ops a3xx_ops)
[ 3.287174] [drm] Initialized msm 1.8.0 20130625 for msm on minor 0
[ 3.293915] 8<--- cut here ---
[ 3.297012] Unable to handle kernel NULL pointer dereference at virtual address 00000028
[ 3.305244] pgd = (ptrval)
[ 3.307989] [00000028] *pgd=00000000
[ 3.311624] Internal error: Oops: 805 [#1] SMP ARM
[ 3.316430] Modules linked in:
[ 3.319503] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.14.0+g682d702b426b #1
[ 3.326652] Hardware name: Freescale i.MX53 (Device Tree Support)
[ 3.332754] PC is at __mutex_init+0x14/0x54
[ 3.336969] LR is at msm_disp_snapshot_init+0x24/0xa0
i.MX53 does not use the DPU controller.
Fix the problem by only calling msm_disp_snapshot_init() on platforms that
use the DPU controller.
Cc: stable@vger.kernel.org
Fixes: 98659487b8 ("drm/msm: add support to take dpu snapshot")
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20210914174831.2044420-1-festevam@gmail.com
Signed-off-by: Rob Clark <robdclark@chromium.org>
These error paths returned 1 on failure, instead of a negative error
code. This would lead to an Oops in the caller. A second problem is
that the check for "if (ret != -ENODATA)" did not work because "ret" was
set to 1.
Fixes: 5785dd7a8e ("drm/msm: Fix duplicate gpu node in icc summary")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20211001125904.GK2283@kili
Signed-off-by: Rob Clark <robdclark@chromium.org>
This code returns 1 on error instead of a negative error. It leads to
an Oops in the caller. A second problem is that the check for
"if (ret != -ENODATA)" cannot be true because "ret" is set to 1.
Fixes: 5785dd7a8e ("drm/msm: Fix duplicate gpu node in icc summary")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20211001125759.GJ2283@kili
Signed-off-by: Rob Clark <robdclark@chromium.org>
The initialization of pointer dev dereferences pointer edp before
edp is null checked, so there is a potential null pointer deference
issue. Fix this by only dereferencing edp after edp has been null
checked.
Addresses-Coverity: ("Dereference before null check")
Fixes: ab5b0107cc ("drm/msm: Initial add eDP support in msm drm driver (v5)")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210929121857.213922-1-colin.king@canonical.com
Signed-off-by: Rob Clark <robdclark@chromium.org>
The return type of ktime_divns() is s64. The timeout_to_jiffies() currently
assigns the result of this ktime_divns() to unsigned long, which on 32 bit
systems may overflow. Furthermore, the result of this function is sometimes
also passed to functions which expect signed long, dma_fence_wait_timeout()
is one such example.
Fix this by adjusting the type of remaining_jiffies to s64, so we do not
suffer overflow there, and return a value limited to range of 0..INT_MAX,
which is safe for all usecases of this timeout.
The above overflow can be triggered if userspace passes in too large timeout
value, larger than INT_MAX / HZ seconds. The kernel detects it and complains
about "schedule_timeout: wrong timeout value %lx" and generates a warning
backtrace.
Note that this fixes commit 6cedb8b377 ("drm/msm: avoid using 'timespec'"),
because the previously used timespec_to_jiffies() function returned unsigned
long instead of s64:
static inline unsigned long timespec_to_jiffies(const struct timespec *value)
Fixes: 6cedb8b377 ("drm/msm: avoid using 'timespec'")
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Jordan Crouse <jcrouse@codeaurora.org>
Cc: Rob Clark <robdclark@chromium.org>
Cc: stable@vger.kernel.org # 5.6+
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210917005913.157379-1-marex@denx.de
Signed-off-by: Rob Clark <robdclark@chromium.org>
