On Mon, Oct 28, 2019 at 08:03:08AM -0700, kernelci.org bot wrote:

Today's -next (anf Friday's) fails to boot on db820c:

>     defconfig:
>         gcc-8:
>             apq8096-db820c: 1 failed lab

It looks like it deadlocks somewhere, the last things in the log are a
failure to start ufshcd-qcom and then an RCU stall some time later:

03:03:27.191914  [   21.156672] ufshcd-qcom 624000.ufshc: ufshcd_populate_vreg: Unable to find vdd-hba-supply regulator, assuming enabled
03:03:27.198061  <LAVA_SIGNAL_TESTCASE TEST_CASE_ID=qup-i2c-driver-present RESULT=pass>
03:03:27.208499  [   21.175985] ufshcd-qcom 624000.ufshc: ufs_qcom_init: required phy device. hasn't probed yet. err = -517
03:03:27.216720  [   21.176014] ufshcd-qcom 624000.ufshc: ufshcd_variant_hba_init: variant qcom init failed err -517
03:03:27.226220  <LAVA_SIGNAL_TESTCASE TEST_CASE_ID=qup-i2c-blsp-i2c2-probed RESULT=pass>
03:03:27.239850  [   21.211424] ufshcd-qcom 624000.ufshc: Initialization failed
03:03:48.157338  [   42.128777] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
03:03:48.167648  [   42.128802] rcu: 	3-...!: (0 ticks this GP) idle=dde/1/0x4000000000000000 softirq=1715/1715 fqs=60
03:03:48.171895  [   42.133839] 	(detected by 0, t=5252 jiffies, g=2301, q=787)

Full details, including the whole log, at:

	https://kernelci.org/boot/id/5db6bf0d59b514a35660ee72/