April 2025 - Linux-stable-mirror

Re: [PATCH v1 01/10] cpufreq: Reference count policy in cpufreq_update_limits()

by Marek Marczykowski-Górecki

On Fri, Mar 28, 2025 at 09:39:08PM +0100, Rafael J. Wysocki wrote: > From: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com> > > Since acpi_processor_notify() can be called before registering a cpufreq > driver or even in cases when a cpufreq driver is not registered at all, > cpufreq_update_limits() needs to check if a cpufreq driver is present > and prevent it from being unregistered. > > For this purpose, make it call cpufreq_cpu_get() to obtain a cpufreq > policy pointer for the given CPU and reference count the corresponding > policy object, if present. > > Fixes: 5a25e3f7cc53 ("cpufreq: intel_pstate: Driver-specific handling of _PPC updates") > Closes: https://lore.kernel.org/linux-acpi/Z-ShAR59cTow0KcR@mail-itl > Reporetd-by: Marek Marczykowski-Górecki <marmarek(a)invisiblethingslab.com> > Cc: All applicable <stable(a)vger.kernel.org> > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com> It looks like this patch is missing in stable branches. > --- > drivers/cpufreq/cpufreq.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > --- a/drivers/cpufreq/cpufreq.c > +++ b/drivers/cpufreq/cpufreq.c > @@ -2781,6 +2781,12 @@ > */ > void cpufreq_update_limits(unsigned int cpu) > { > + struct cpufreq_policy *policy __free(put_cpufreq_policy); > + > + policy = cpufreq_cpu_get(cpu); > + if (!policy) > + return; > + > if (cpufreq_driver->update_limits) > cpufreq_driver->update_limits(cpu); > else > > > -- Best Regards, Marek Marczykowski-Górecki Invisible Things Lab

2 months, 2 weeks

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Re: [PATCH v7] staging: rtl8723bs: Add error handling for sd_read()

by Greg KH

On Tue, Apr 15, 2025 at 08:28:18PM +0800, Wentao Liang wrote: > >Again, I think this whole "hal wrapper" should be removed instead, and > >not papered over like this. If you dig deep enough, it all boils down > >to a call to sdio_readb(), which is an 8 bit read, so the alignment > >issues are not a problem, and if an error happens the proper error value> > >is returned from that saying what happened. Why not work on that like I > >recommended? That would allow for at least 3, if not more, layers of > >indirection to be removed from this driver, making it more easy to > >understand and maintain over time. > > Thanks for the guidance and detailed suggestion. But remove the whole > "hal wrapper" layer is beyond my capability. Perhaps this refactoring > work would be better handled by someone with deeper knowledge of the > driver codebase. The changes would ripple through several layers, and > I'm not entirely confident about implementing them correctly. The > current patch might serve as a reasonable stopgap solution. Try it, it should be a "one step at a time" of unwinding the mess that the codebase is in. Shouldn't be that hard, and will give you lots of good things to work on. I don't want to take a "stopgap solution", sorry, I would rather take the real solution, for obvious reasons. thanks, greg k-h

2 months, 2 weeks

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Re: [PATCH 1/3] drm/nouveau: Prevent signaled fences in pending list

by Philipp Stanner

On Fri, 2025-04-11 at 13:05 +0200, Christian König wrote: > Am 11.04.25 um 11:29 schrieb Philipp Stanner: > > > [SNIP] > > > > It could be, however, that at the same moment > > nouveau_fence_signal() is > > removing that entry, holding the appropriate lock. > > > > So we have a race. Again. > > > > Ah, yes of course. If signaled is called with or without the lock is > actually undetermined. > > > > > > You see, fixing things in Nouveau is difficult :) > > It gets more difficult if you want to clean it up "properly", so it > > conforms to rules such as those from dma_fence. > > > > I have now provided two fixes that both work, but you are not > > satisfied > > with from the dma_fence-maintainer's perspective. I understand > > that, > > but please also understand that it's actually not my primary task > > to > > work on Nouveau. I just have to fix this bug to move on with my > > scheduler work. > > > > Well I'm happy with whatever solution as long as it works, but as > far as I can see the approach with the callback simply doesn't. > > You just can't drop the fence reference for the list from the > callback. > > > > > > So if you have another idea, feel free to share it. But I'd like to > > know how we can go on here. > > > > Well the fence code actually works, doesn't it? The problem is > rather that setting the error throws a warning because it doesn't > expect signaled fences on the pending list. > > Maybe we should fix that instead. The fence code works as the author intended, but I would be happy if it were more explicitly documented. Regarding the WARN_ON: It occurs in dma_fence_set_error() because there is an attempt to set an error code on a signaled fence. I don't think that should be "fixed", it works as intended: You must not set an error code of a fence that was already signaled. The reason seems to be that once a fence is signaled, a third party might evaluate the error code. But I think this wasn't wat you meant with "fix". In any case, there must not be signaled fences in nouveau's pending- list. They must be removed immediately once they signal, and this must not race. > > > > > > I'm running out of ideas. What I'm wondering if we couldn't just > > remove > > performance hacky fastpath functions such as > > nouveau_fence_is_signaled() completely. It seems redundant to me. > > > > That would work for me as well. I'll test this approach. Seems a bit like the nuclear approach, but if it works we'd at least clean up a lot of this mess. P. > > > > > > > > Or we might add locking to it, but IDK what was achieved with RCU > > here. > > In any case it's definitely bad that Nouveau has so many redundant > > and > > half-redundant mechanisms. > > > > Yeah, agree messing with the locks even more won't help us here. > > Regards, > Christian. > > > > > > > > > > P. > > > > > > > > > > > > > P. > > > > > > > > > > > > > > Regards, > > > > Christian. > > > > > > > > > > > > > > > > > > P. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Regards, > > > > > > Christian. > > > > > > > > > > > > > > > > > > > > > > > > > > Replace the call to dma_fence_is_signaled() with > > > > > > > nouveau_fence_base_is_signaled(). > > > > > > > > > > > > > > Cc: <stable(a)vger.kernel.org> # 4.10+, precise commit not > > > > > > > to > > > > > > > be > > > > > > > determined > > > > > > > Signed-off-by: Philipp Stanner <phasta(a)kernel.org> > > > > > > > --- > > > > > > > drivers/gpu/drm/nouveau/nouveau_fence.c | 2 +- > > > > > > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > > > > > > > > > > > diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.c > > > > > > > b/drivers/gpu/drm/nouveau/nouveau_fence.c > > > > > > > index 7cc84472cece..33535987d8ed 100644 > > > > > > > --- a/drivers/gpu/drm/nouveau/nouveau_fence.c > > > > > > > +++ b/drivers/gpu/drm/nouveau/nouveau_fence.c > > > > > > > @@ -274,7 +274,7 @@ nouveau_fence_done(struct > > > > > > > nouveau_fence > > > > > > > *fence) > > > > > > > nvif_event_block(&fctx->event); > > > > > > > spin_unlock_irqrestore(&fctx->lock, > > > > > > > flags); > > > > > > > } > > > > > > > - return dma_fence_is_signaled(&fence->base); > > > > > > > + return test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, > > > > > > > &fence- > > > > > > > > > > > > > > > > > > > > > > > base.flags); > > > > > > > > > > > > > > > > > > > > > > } > > > > > > > > > > > > > > static long > > > > > > > > > > > > > > > > > > > > > > > > > > > > >

2 months, 2 weeks

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[PATCH v2] brcm80211: fmac: Add error handling forbrcmf_usb_dl_writeimage()

by Wentao Liang

The function brcmf_usb_dl_writeimage() calls the function brcmf_usb_dl_cmd() but dose not check its return value. The 'state.state' and the 'state.bytes' are uninitialized if the function brcmf_usb_dl_cmd() fails. It is dangerous to use uninitialized variables in the conditions. Add error handling for brcmf_usb_dl_cmd() to jump to error handling path if the brcmf_usb_dl_cmd() fails and the 'state.state' and the 'state.bytes' are uninitialized. Improve the error message to report more detailed error information. Fixes: 71bb244ba2fd ("brcm80211: fmac: add USB support for bcm43235/6/8 chipsets") Cc: stable(a)vger.kernel.org # v3.4+ Signed-off-by: Wentao Liang <vulab(a)iscas.ac.cn> --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c index 2821c27f317e..d06c724f63d9 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c @@ -896,14 +896,16 @@ brcmf_usb_dl_writeimage(struct brcmf_usbdev_info *devinfo, u8 *fw, int fwlen) } /* 1) Prepare USB boot loader for runtime image */ - brcmf_usb_dl_cmd(devinfo, DL_START, &state, sizeof(state)); + err = brcmf_usb_dl_cmd(devinfo, DL_START, &state, sizeof(state)); + if (err) + goto fail; rdlstate = le32_to_cpu(state.state); rdlbytes = le32_to_cpu(state.bytes); /* 2) Check we are in the Waiting state */ if (rdlstate != DL_WAITING) { - brcmf_err("Failed to DL_START\n"); + brcmf_err("Invalid DL state: %u\n", rdlstate); err = -EINVAL; goto fail; } -- 2.42.0.windows.2

2 months, 2 weeks

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[PATCH v3 7/7] arm64: dts: ti: k3-am62x: Rename I2C switch to I2C mux in OV5640 overlay

by Yemike Abhilash Chandra

The OV5640 device tree overlay incorrectly defined an I2C switch instead of an I2C mux. According to the DT bindings, the correct terminology and node definition should use "i2c-mux" instead of "i2c-switch". Hence, update the same to avoid dtbs_check warnings. Fixes: 635ed9715194 ("arm64: dts: ti: k3-am62x: Add overlays for OV5640") Cc: stable(a)vger.kernel.org Signed-off-by: Yemike Abhilash Chandra <y-abhilashchandra(a)ti.com> Reviewed-by: Neha Malcom Francis <n-francis(a)ti.com> Reviewed-by: Jai Luthra <jai.luthra(a)linux.dev> --- arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-ov5640.dtso | 2 +- arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-tevi-ov5640.dtso | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-ov5640.dtso b/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-ov5640.dtso index ccc7f5e43184..7fc7c95f5cd5 100644 --- a/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-ov5640.dtso +++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-ov5640.dtso @@ -22,7 +22,7 @@ &main_i2c2 { #size-cells = <0>; status = "okay"; - i2c-switch@71 { + i2c-mux@71 { compatible = "nxp,pca9543"; #address-cells = <1>; #size-cells = <0>; diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-tevi-ov5640.dtso b/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-tevi-ov5640.dtso index 4eaf9d757dd0..b6bfdfbbdd98 100644 --- a/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-tevi-ov5640.dtso +++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-tevi-ov5640.dtso @@ -22,7 +22,7 @@ &main_i2c2 { #size-cells = <0>; status = "okay"; - i2c-switch@71 { + i2c-mux@71 { compatible = "nxp,pca9543"; #address-cells = <1>; #size-cells = <0>; -- 2.34.1

2 months, 2 weeks

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[PATCH v3 6/7] arm64: dts: ti: k3-am62x: Rename I2C switch to I2C mux in IMX219 overlay

by Yemike Abhilash Chandra

The IMX219 device tree overlay incorrectly defined an I2C switch instead of an I2C mux. According to the DT bindings, the correct terminology and node definition should use "i2c-mux" instead of "i2c-switch". Hence, update the same to avoid dtbs_check warnings. Fixes: 4111db03dc05 ("arm64: dts: ti: k3-am62x: Add overlay for IMX219") Cc: stable(a)vger.kernel.org Signed-off-by: Yemike Abhilash Chandra <y-abhilashchandra(a)ti.com> Reviewed-by: Neha Malcom Francis <n-francis(a)ti.com> Reviewed-by: Jai Luthra <jai.luthra(a)linux.dev> --- arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-imx219.dtso | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-imx219.dtso b/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-imx219.dtso index 7a0d35eb04d3..dd090813a32d 100644 --- a/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-imx219.dtso +++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-imx219.dtso @@ -22,7 +22,7 @@ &main_i2c2 { #size-cells = <0>; status = "okay"; - i2c-switch@71 { + i2c-mux@71 { compatible = "nxp,pca9543"; #address-cells = <1>; #size-cells = <0>; -- 2.34.1

2 months, 2 weeks

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[PATCH v3 5/7] arm64: dts: ti: k3-am62x: Remove clock-names property from IMX219 overlay

by Yemike Abhilash Chandra

The IMX219 sensor device tree bindings do not include a clock-names property. Remove the incorrectly added clock-names entry to avoid dtbs_check warnings. Fixes: 4111db03dc05 ("arm64: dts: ti: k3-am62x: Add overlay for IMX219") Cc: stable(a)vger.kernel.org Signed-off-by: Yemike Abhilash Chandra <y-abhilashchandra(a)ti.com> Reviewed-by: Neha Malcom Francis <n-francis(a)ti.com> Reviewed-by: Jai Luthra <jai.luthra(a)linux.dev> --- arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-imx219.dtso | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-imx219.dtso b/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-imx219.dtso index 76ca02127f95..7a0d35eb04d3 100644 --- a/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-imx219.dtso +++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-imx219.dtso @@ -39,7 +39,6 @@ ov5640: camera@10 { reg = <0x10>; clocks = <&clk_imx219_fixed>; - clock-names = "xclk"; reset-gpios = <&exp1 13 GPIO_ACTIVE_HIGH>; -- 2.34.1

2 months, 2 weeks

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[PATCH v3 4/7] arm64: dts: ti: k3-j721e-sk: Add requiried voltage supplies for IMX219

by Yemike Abhilash Chandra

The device tree overlay for the IMX219 sensor requires three voltage supplies to be defined: VANA (analog), VDIG (digital core), and VDDL (digital I/O). Add the corresponding voltage supply definitions to avoid dtbs_check warnings. Fixes: f767eb918096 ("arm64: dts: ti: k3-j721e-sk: Add overlay for IMX219") Cc: stable(a)vger.kernel.org Signed-off-by: Yemike Abhilash Chandra <y-abhilashchandra(a)ti.com> --- .../dts/ti/k3-j721e-sk-csi2-dual-imx219.dtso | 33 +++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/arch/arm64/boot/dts/ti/k3-j721e-sk-csi2-dual-imx219.dtso b/arch/arm64/boot/dts/ti/k3-j721e-sk-csi2-dual-imx219.dtso index 4a395d1209c8..4eb3cffab032 100644 --- a/arch/arm64/boot/dts/ti/k3-j721e-sk-csi2-dual-imx219.dtso +++ b/arch/arm64/boot/dts/ti/k3-j721e-sk-csi2-dual-imx219.dtso @@ -19,6 +19,33 @@ clk_imx219_fixed: imx219-xclk { #clock-cells = <0>; clock-frequency = <24000000>; }; + + reg_2p8v: regulator-2p8v { + compatible = "regulator-fixed"; + regulator-name = "2P8V"; + regulator-min-microvolt = <2800000>; + regulator-max-microvolt = <2800000>; + vin-supply = <&vdd_sd_dv>; + regulator-always-on; + }; + + reg_1p8v: regulator-1p8v { + compatible = "regulator-fixed"; + regulator-name = "1P8V"; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; + vin-supply = <&vdd_sd_dv>; + regulator-always-on; + }; + + reg_1p2v: regulator-1p2v { + compatible = "regulator-fixed"; + regulator-name = "1P2V"; + regulator-min-microvolt = <1200000>; + regulator-max-microvolt = <1200000>; + vin-supply = <&vdd_sd_dv>; + regulator-always-on; + }; }; &csi_mux { @@ -34,6 +61,9 @@ imx219_0: imx219-0@10 { reg = <0x10>; clocks = <&clk_imx219_fixed>; + VANA-supply = <&reg_2p8v>; + VDIG-supply = <&reg_1p8v>; + VDDL-supply = <&reg_1p2v>; port { csi2_cam0: endpoint { @@ -55,6 +85,9 @@ imx219_1: imx219-1@10 { reg = <0x10>; clocks = <&clk_imx219_fixed>; + VANA-supply = <&reg_2p8v>; + VDIG-supply = <&reg_1p8v>; + VDDL-supply = <&reg_1p2v>; port { csi2_cam1: endpoint { -- 2.34.1

2 months, 2 weeks

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[PATCH v3 3/7] arm64: dts: ti: k3-j721e-sk: Remove clock-names property from IMX219 overlay

by Yemike Abhilash Chandra

The IMX219 sensor device tree bindings do not include a clock-names property. Remove the incorrectly added clock-names entry to avoid dtbs_check warnings. Fixes: f767eb918096 ("arm64: dts: ti: k3-j721e-sk: Add overlay for IMX219") Cc: stable(a)vger.kernel.org Signed-off-by: Yemike Abhilash Chandra <y-abhilashchandra(a)ti.com> Reviewed-by: Neha Malcom Francis <n-francis(a)ti.com> Reviewed-by: Jai Luthra <jai.luthra(a)linux.dev> --- arch/arm64/boot/dts/ti/k3-j721e-sk-csi2-dual-imx219.dtso | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/arm64/boot/dts/ti/k3-j721e-sk-csi2-dual-imx219.dtso b/arch/arm64/boot/dts/ti/k3-j721e-sk-csi2-dual-imx219.dtso index 47bb5480b5b0..4a395d1209c8 100644 --- a/arch/arm64/boot/dts/ti/k3-j721e-sk-csi2-dual-imx219.dtso +++ b/arch/arm64/boot/dts/ti/k3-j721e-sk-csi2-dual-imx219.dtso @@ -34,7 +34,6 @@ imx219_0: imx219-0@10 { reg = <0x10>; clocks = <&clk_imx219_fixed>; - clock-names = "xclk"; port { csi2_cam0: endpoint { @@ -56,7 +55,6 @@ imx219_1: imx219-1@10 { reg = <0x10>; clocks = <&clk_imx219_fixed>; - clock-names = "xclk"; port { csi2_cam1: endpoint { -- 2.34.1

2 months, 2 weeks

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[PATCH v3 2/7] arm64: dts: ti: am68-sk: Fix regulator hierarchy

by Yemike Abhilash Chandra

Update the vin-supply of the TLV71033 regulator from LM5141 (vsys_3v3) to LM61460 (vsys_5v0) to match the schematics. Add a fixed regulator node for the LM61460 5V supply to support this change. AM68-SK schematics: https://www.ti.com/lit/zip/sprr463 Fixes: a266c180b398 ("arm64: dts: ti: k3-am68-sk: Add support for AM68 SK base board") Cc: stable(a)vger.kernel.org Signed-off-by: Yemike Abhilash Chandra <y-abhilashchandra(a)ti.com> Reviewed-by: Neha Malcom Francis <n-francis(a)ti.com> Reviewed-by: Udit Kumar <u-kumar1(a)ti.com> --- arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts b/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts index 11522b36e0ce..5fa70a874d7b 100644 --- a/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts +++ b/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts @@ -44,6 +44,17 @@ vusb_main: regulator-vusb-main5v0 { regulator-boot-on; }; + vsys_5v0: regulator-vsys5v0 { + /* Output of LM61460 */ + compatible = "regulator-fixed"; + regulator-name = "vsys_5v0"; + regulator-min-microvolt = <5000000>; + regulator-max-microvolt = <5000000>; + vin-supply = <&vusb_main>; + regulator-always-on; + regulator-boot-on; + }; + vsys_3v3: regulator-vsys3v3 { /* Output of LM5141 */ compatible = "regulator-fixed"; @@ -76,7 +87,7 @@ vdd_sd_dv: regulator-tlv71033 { regulator-min-microvolt = <1800000>; regulator-max-microvolt = <3300000>; regulator-boot-on; - vin-supply = <&vsys_3v3>; + vin-supply = <&vsys_5v0>; gpios = <&main_gpio0 49 GPIO_ACTIVE_HIGH>; states = <1800000 0x0>, <3300000 0x1>; -- 2.34.1

2 months, 2 weeks

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