Hi All, I working on ARM juno R2 board, with latest kernel 4.8.rc7 and I get below USB EHCI probe error while booting with acpi=force. EFI stub: Booting Linux Kernel... ConvertPages: Incompatible memory types EFI stub: Using DTB from command line EFI stub: Exiting boot services and installing virtual address map... [ 0.000000] Booting Linux on physical CPU 0x100 [ 0.000000] Linux version 4.8.0-rc7-00142-gb1f2beb (vikas@dctxvm241) (gcc version 4.8.3 20140401 (prerelease) (crosstool-NG linaro-1.13.1-4.8-2014.04 - Linaro GCC 4.8-2014.04) ) #48 SMP PREEMPT Mon Sep 26 15:31:48 IST 2016 [ 0.000000] Boot CPU: AArch64 Processor [410fd033] [ 0.000000] efi: Getting EFI parameters from FDT: [ 0.000000] efi: EFI v2.50 by ARM Juno EFI Oct 15 2015 14:16:39 [ 0.000000] efi: ACPI=0xfe750000 ACPI 2.0=0xfe750014 PROP=0xfe794370 [ 0.000000] cma: Reserved 16 MiB at 0x00000000fd400000 [ 0.000000] ACPI: Early table checksum verification disabled [ 0.000000] ACPI: RSDP 0x00000000FE750014 000024 (v02 ARMLTD) [ 0.000000] ACPI: XSDT 0x00000000FE7400E8 00003C (v01 ARMLTD ARM-JUNO 20140727 01000013) [ 0.000000] ACPI: FACP 0x00000000FE720000 00010C (v05 ARMLTD ARM-JUNO 20140727 ARM 00000099) [ 0.000000] ACPI: DSDT 0x00000000FE6F0000 000317 (v01 ARMLTD ARM-JUNO 20140727 INTL 20140214) [ 0.000000] ACPI: GTDT 0x00000000FE710000 000060 (v02 ARMLTD ARM-JUNO 20140727 ARM 00000099) [ 0.000000] ACPI: APIC 0x00000000FE700000 000224 (v01 ARMLTD ARM-JUNO 20140727 ARM 00000099) [ 0.000000] psci: probing for conduit method from ACPI. [ 0.000000] psci: PSCIv1.0 detected in firmware. [ 0.000000] psci: Using standard PSCI v0.2 function IDs [ 0.000000] psci: MIGRATE_INFO_TYPE not supported. [ 0.000000] percpu: Embedded 21 pages/cpu @ffff80097feb8000 s47488 r8192 d30336 u86016 [ 0.000000] Detected VIPT I-cache on CPU0 [ 0.000000] CPU features: enabling workaround for ARM erratum 845719 [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 2060048 [ 0.000000] Kernel command line: dtb=board.dtb initrd=ramdisk.img console=ttyAMA0,115200 acpi=force root=/dev/sda1 [ 0.000000] log_buf_len individual max cpu contribution: 4096 bytes [ 0.000000] log_buf_len total cpu_extra contributions: 20480 bytes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [ 1.223662] VFIO - User Level meta-driver version: 0.3 [ 1.229335] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 1.235882] ehci-pci: EHCI PCI platform driver [ 1.240359] ehci-platform: EHCI generic platform driver [ 1.245619] ehci-platform ARMH0D20:00: Error: DMA mask configuration failed [ 1.272491] ehci-platform: probe of ARMH0D20:00 failed with error -5 [ 1.278876] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 1.285071] ohci-pci: OHCI PCI platform driver [ 1.289548] ohci-platform: OHCI generic platform driver [ 1.294884] usbcore: registered new interface driver usb-storage [ 1.301231] mousedev: PS/2 mouse device common for all mice [ 1.307197] rtc-efi rtc-efi: rtc core: registered rtc-efi as rtc0 But this error goes off, if I don't force ACPI booting, i.e., if I remove acpi=force from kernel command line , USB is detected and my RFS which is in the usb drive, gets mounted successfully. Thanks and Regards Vikas Sajjan -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
