mainline/master bisection: baseline.dmesg.crit on qemu_arm-vexpress-a15
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  • mainline/master bisection: baseline.dmesg.crit on qemu_arm-vexpress-a15
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kernelci.org bot July 6, 2020, 2:12 a.m. UTC
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* This automated bisection report was sent to you on the basis  *
* that you may be involved with the breaking commit it has      *
* found.  No manual investigation has been done to verify it,   *
* and the root cause of the problem may be somewhere else.      *
*                                                               *
* If you do send a fix, please include this trailer:            *
*   Reported-by: "kernelci.org bot" <bot@kernelci.org>          *
*                                                               *
* Hope this helps!                                              *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

mainline/master bisection: baseline.dmesg.crit on qemu_arm-vexpress-a15

Summary:
  Start:      bb5a93aaf252 x86/ldt: use "pr_info_once()" instead of open-coding it badly
  Plain log:  https://storage.kernelci.org/mainline/master/v5.8-rc3-225-gbb5a93aaf252/arm/vexpress_defconfig/gcc-8/lab-cip/baseline-vexpress-v2p-ca15-tc1.txt
  HTML log:   https://storage.kernelci.org/mainline/master/v5.8-rc3-225-gbb5a93aaf252/arm/vexpress_defconfig/gcc-8/lab-cip/baseline-vexpress-v2p-ca15-tc1.html
  Result:     38ac46002d1d arm: dts: vexpress: Move mcc node back into motherboard node

Checks:
  revert:     PASS
  verify:     PASS

Parameters:
  Tree:       mainline
  URL:        https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
  Branch:     master
  Target:     qemu_arm-vexpress-a15
  CPU arch:   arm
  Lab:        lab-cip
  Compiler:   gcc-8
  Config:     vexpress_defconfig
  Test case:  baseline.dmesg.crit

Breaking commit found:

-------------------------------------------------------------------------------
commit 38ac46002d1df5707566a73486452851341028d2
Author: Andre Przywara <andre.przywara@arm.com>
Date:   Wed Jun 3 17:22:37 2020 +0100

    arm: dts: vexpress: Move mcc node back into motherboard node
    
    Commit d9258898ad49 ("arm64: dts: arm: vexpress: Move fixed devices
    out of bus node") moved the "mcc" DT node into the root node, because
    it does not have any children using "reg" properties, so does violate
    some dtc checks about "simple-bus" nodes.
    
    However this broke the vexpress config-bus code, which walks up the
    device tree to find the first node with an "arm,vexpress,site" property.
    This gave the wrong result (matching the root node instead of the
    motherboard node), so broke the clocks and some other devices for
    VExpress boards.
    
    Move the whole node back into its original position. This re-introduces
    the dtc warning, but is conceptually the right thing to do. The dtc
    warning seems to be overzealous here, there are discussions on fixing or
    relaxing this check instead.
    
    Link: https://lore.kernel.org/r/20200603162237.16319-1-andre.przywara@arm.com
    Fixes: d9258898ad49 ("arm64: dts: vexpress: Move fixed devices out of bus node")
    Reported-and-tested-by: Guenter Roeck <linux@roeck-us.net>
    Signed-off-by: Andre Przywara <andre.przywara@arm.com>
    Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

-------------------------------------------------------------------------------


Git bisection log:

-------------------------------------------------------------------------------
git bisect start
# good: [719fdd32921fb7e3208db8832d32ae1c2d68900f] afs: Fix storage of cell names
git bisect good 719fdd32921fb7e3208db8832d32ae1c2d68900f
# bad: [bb5a93aaf25261321db0c499cde7da6ee9d8b164] x86/ldt: use "pr_info_once()" instead of open-coding it badly
git bisect bad bb5a93aaf25261321db0c499cde7da6ee9d8b164
# bad: [0c7415c31ea9482c4377287af5f459778bf64d2a] Merge tag 'tpmdd-next-v5.8-rc4' of git://git.infradead.org/users/jjs/linux-tpmdd
git bisect bad 0c7415c31ea9482c4377287af5f459778bf64d2a
# bad: [e44b59cd758acdd413512d4597a1fabdadfe3abf] Merge tag 'arm-fixes-5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
git bisect bad e44b59cd758acdd413512d4597a1fabdadfe3abf
# good: [91a9a90d040e8b9ff63d48ea71468e0f4db764ff] Merge tag 'sched_urgent_for_5.8_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 91a9a90d040e8b9ff63d48ea71468e0f4db764ff
# bad: [42d3f7e8da1bc55e3109f612c519c945f6587194] Merge tag 'imx-fixes-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into arm/fixes
git bisect bad 42d3f7e8da1bc55e3109f612c519c945f6587194
# bad: [6d89c73ca5813768a2cc66f7420ac0cbddf4f37d] Merge tag 'arm-soc/for-5.8/soc-fixes' of https://github.com/Broadcom/stblinux into arm/fixes
git bisect bad 6d89c73ca5813768a2cc66f7420ac0cbddf4f37d
# bad: [0f77ce26ebcf6ea384421d2dd47b924b83649692] Revert "ARM: sti: Implement dummy L2 cache's write_sec"
git bisect bad 0f77ce26ebcf6ea384421d2dd47b924b83649692
# bad: [d68ec1644dd546851d651787a638aead32a60a6f] Merge tag 'juno-fix-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into arm/fixes
git bisect bad d68ec1644dd546851d651787a638aead32a60a6f
# bad: [38ac46002d1df5707566a73486452851341028d2] arm: dts: vexpress: Move mcc node back into motherboard node
git bisect bad 38ac46002d1df5707566a73486452851341028d2
# first bad commit: [38ac46002d1df5707566a73486452851341028d2] arm: dts: vexpress: Move mcc node back into motherboard node
-------------------------------------------------------------------------------

Comments

Sudeep Holla July 6, 2020, 12:49 p.m. UTC | #1
Hi,

On Sun, Jul 05, 2020 at 07:12:58PM -0700, kernelci.org bot wrote:
> * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
> * This automated bisection report was sent to you on the basis  *
> * that you may be involved with the breaking commit it has      *
> * found.  No manual investigation has been done to verify it,   *
> * and the root cause of the problem may be somewhere else.      *
> *                                                               *
> * If you do send a fix, please include this trailer:            *
> *   Reported-by: "kernelci.org bot" <bot@kernelci.org>          *
> *                                                               *
> * Hope this helps!                                              *
> * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
> 

Andre test and replied to one of the similar but earlier reports.
Unless we get some response to that, we can't proceed and we can't
do much other than ignoring these reports. Please respond to Andre's
queries.
Guillaume Tucker July 16, 2020, 8:57 a.m. UTC | #2
On 06/07/2020 13:49, Sudeep Holla wrote:
> Hi,
> 
> On Sun, Jul 05, 2020 at 07:12:58PM -0700, kernelci.org bot wrote:
>> * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
>> * This automated bisection report was sent to you on the basis  *
>> * that you may be involved with the breaking commit it has      *
>> * found.  No manual investigation has been done to verify it,   *
>> * and the root cause of the problem may be somewhere else.      *
>> *                                                               *
>> * If you do send a fix, please include this trailer:            *
>> *   Reported-by: "kernelci.org bot" <bot@kernelci.org>          *
>> *                                                               *
>> * Hope this helps!                                              *
>> * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
>>
> 
> Andre test and replied to one of the similar but earlier reports.
> Unless we get some response to that, we can't proceed and we can't
> do much other than ignoring these reports. Please respond to Andre's
> queries.


Sorry I missed your email, the regression is still there.  I'll
reply to André.

Guillaume

Patch
diff mbox series

diff --git a/arch/arm/boot/dts/vexpress-v2m-rs1.dtsi b/arch/arm/boot/dts/vexpress-v2m-rs1.dtsi
index e6308fb76183..a88ee5294d35 100644
--- a/arch/arm/boot/dts/vexpress-v2m-rs1.dtsi
+++ b/arch/arm/boot/dts/vexpress-v2m-rs1.dtsi
@@ -100,79 +100,6 @@ 
 		};
 	};
 
-	mcc {
-		compatible = "arm,vexpress,config-bus";
-		arm,vexpress,config-bridge = <&v2m_sysreg>;
-
-		oscclk0 {
-			/* MCC static memory clock */
-			compatible = "arm,vexpress-osc";
-			arm,vexpress-sysreg,func = <1 0>;
-			freq-range = <25000000 60000000>;
-			#clock-cells = <0>;
-			clock-output-names = "v2m:oscclk0";
-		};
-
-		v2m_oscclk1: oscclk1 {
-			/* CLCD clock */
-			compatible = "arm,vexpress-osc";
-			arm,vexpress-sysreg,func = <1 1>;
-			freq-range = <23750000 65000000>;
-			#clock-cells = <0>;
-			clock-output-names = "v2m:oscclk1";
-		};
-
-		v2m_oscclk2: oscclk2 {
-			/* IO FPGA peripheral clock */
-			compatible = "arm,vexpress-osc";
-			arm,vexpress-sysreg,func = <1 2>;
-			freq-range = <24000000 24000000>;
-			#clock-cells = <0>;
-			clock-output-names = "v2m:oscclk2";
-		};
-
-		volt-vio {
-			/* Logic level voltage */
-			compatible = "arm,vexpress-volt";
-			arm,vexpress-sysreg,func = <2 0>;
-			regulator-name = "VIO";
-			regulator-always-on;
-			label = "VIO";
-		};
-
-		temp-mcc {
-			/* MCC internal operating temperature */
-			compatible = "arm,vexpress-temp";
-			arm,vexpress-sysreg,func = <4 0>;
-			label = "MCC";
-		};
-
-		reset {
-			compatible = "arm,vexpress-reset";
-			arm,vexpress-sysreg,func = <5 0>;
-		};
-
-		muxfpga {
-			compatible = "arm,vexpress-muxfpga";
-			arm,vexpress-sysreg,func = <7 0>;
-		};
-
-		shutdown {
-			compatible = "arm,vexpress-shutdown";
-			arm,vexpress-sysreg,func = <8 0>;
-		};
-
-		reboot {
-			compatible = "arm,vexpress-reboot";
-			arm,vexpress-sysreg,func = <9 0>;
-		};
-
-		dvimode {
-			compatible = "arm,vexpress-dvimode";
-			arm,vexpress-sysreg,func = <11 0>;
-		};
-	};
-
 	bus@8000000 {
 		motherboard-bus {
 			model = "V2M-P1";
@@ -435,6 +362,79 @@ 
 						};
 					};
 				};
+
+				mcc {
+					compatible = "arm,vexpress,config-bus";
+					arm,vexpress,config-bridge = <&v2m_sysreg>;
+
+					oscclk0 {
+						/* MCC static memory clock */
+						compatible = "arm,vexpress-osc";
+						arm,vexpress-sysreg,func = <1 0>;
+						freq-range = <25000000 60000000>;
+						#clock-cells = <0>;
+						clock-output-names = "v2m:oscclk0";
+					};
+
+					v2m_oscclk1: oscclk1 {
+						/* CLCD clock */
+						compatible = "arm,vexpress-osc";
+						arm,vexpress-sysreg,func = <1 1>;
+						freq-range = <23750000 65000000>;
+						#clock-cells = <0>;
+						clock-output-names = "v2m:oscclk1";
+					};
+
+					v2m_oscclk2: oscclk2 {
+						/* IO FPGA peripheral clock */
+						compatible = "arm,vexpress-osc";
+						arm,vexpress-sysreg,func = <1 2>;
+						freq-range = <24000000 24000000>;
+						#clock-cells = <0>;
+						clock-output-names = "v2m:oscclk2";
+					};
+
+					volt-vio {
+						/* Logic level voltage */
+						compatible = "arm,vexpress-volt";
+						arm,vexpress-sysreg,func = <2 0>;
+						regulator-name = "VIO";
+						regulator-always-on;
+						label = "VIO";
+					};
+
+					temp-mcc {
+						/* MCC internal operating temperature */
+						compatible = "arm,vexpress-temp";
+						arm,vexpress-sysreg,func = <4 0>;
+						label = "MCC";
+					};
+
+					reset {
+						compatible = "arm,vexpress-reset";
+						arm,vexpress-sysreg,func = <5 0>;
+					};
+
+					muxfpga {
+						compatible = "arm,vexpress-muxfpga";
+						arm,vexpress-sysreg,func = <7 0>;
+					};
+
+					shutdown {
+						compatible = "arm,vexpress-shutdown";
+						arm,vexpress-sysreg,func = <8 0>;
+					};
+
+					reboot {
+						compatible = "arm,vexpress-reboot";
+						arm,vexpress-sysreg,func = <9 0>;
+					};
+
+					dvimode {
+						compatible = "arm,vexpress-dvimode";
+						arm,vexpress-sysreg,func = <11 0>;
+					};
+				};
 			};
 		};
 	};