From mboxrd@z Thu Jan 1 00:00:00 1970 From: tony@atomide.com (Tony Lindgren) Date: Tue, 13 Oct 2015 16:13:20 -0700 Subject: [PATCH] ARM: OMAP2+: Fix oops with LPAE and more than 2GB of memory Message-ID: <1444778000-22537-1-git-send-email-tony@atomide.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On boards with more than 2GB of RAM booting goes wrong with things not working and we're getting lots of l3 warnings: WARNING: CPU: 0 PID: 1 at drivers/bus/omap_l3_noc.c:147 l3_interrupt_handler+0x260/0x384() 44000000.ocp:L3 Custom Error: MASTER MMC6 TARGET DMM1 (Idle): Data Access in User mode during Functional access ... [] (scsi_add_host_with_dma) from [] (ata_scsi_add_hosts+0x5c/0x18c) [] (ata_scsi_add_hosts) from [] (ata_host_register+0x150/0x2cc) [] (ata_host_register) from [] (ata_host_activate+0xd4/0x124) [] (ata_host_activate) from [] (ahci_host_activate+0x5c/0x194) [] (ahci_host_activate) from [] (ahci_platform_init_host+0x1f0/0x3f0) [] (ahci_platform_init_host) from [] (ahci_probe+0x70/0x98) [] (ahci_probe) from [] (platform_drv_probe+0x54/0xb4) Let's fix the issue by enabling ZONE_DMA for LPAE. Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/Kconfig | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig index b3a0dff..33d1460 100644 --- a/arch/arm/mach-omap2/Kconfig +++ b/arch/arm/mach-omap2/Kconfig @@ -49,6 +49,7 @@ config SOC_OMAP5 select OMAP_INTERCONNECT select OMAP_INTERCONNECT_BARRIER select PM_OPP if PM + select ZONE_DMA if ARM_LPAE config SOC_AM33XX bool "TI AM33XX" @@ -78,6 +79,7 @@ config SOC_DRA7XX select OMAP_INTERCONNECT select OMAP_INTERCONNECT_BARRIER select PM_OPP if PM + select ZONE_DMA if ARM_LPAE config ARCH_OMAP2PLUS bool -- 2.1.4