From mboxrd@z Thu Jan 1 00:00:00 1970 From: sergei.shtylyov@cogentembedded.com (Sergei Shtylyov) Date: Wed, 30 Sep 2015 23:10:47 +0300 Subject: [PATCH 30/31] ARM: shmobile: r8a7791: add USB-DMAC device nodes In-Reply-To: References: <560B11FF.3010305@cogentembedded.com> Message-ID: <560C41C7.70200@cogentembedded.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 09/30/2015 09:44 AM, Geert Uytterhoeven wrote: >>> From: Yoshihiro Shimoda >>> >>> Signed-off-by: Yoshihiro Shimoda >>> Acked-by: Geert Uytterhoeven >>> Signed-off-by: Simon Horman >>> --- >>> arch/arm/boot/dts/r8a7791.dtsi | 22 ++++++++++++++++++++++ >>> 1 file changed, 22 insertions(+) >> When the USB-DMAC driver is enabled, this causes kernel oops on at least >> the R8A7791 Henninger/Porter boards (haven't checked the others yet) with >> renesas-devel-20150928-v4.3-rc3 and even earlier tag. The oops can only be >> seen with the earlyprintk=serial kernel parameter, otherwise the kernel just >> hangs with a blank console. > > My current kernel on r8a7791/koelsch has CONFIG_RENESAS_USB_DMAC=y and boots > fine. > > renesas-devel-20150928-v4.3-rc3 with shmobile_defconfig + > CONFIG_RENESAS_USB_DMAC=y also boots fine. Indeed, I was able to boot it all the way on Henninger. > Do I need to enable/disable config options to trigger this? It appears so. I just don't know what -- the diff between my .config and shmobile_defconfig is 150+ hunks. :-( > Gr{oetje,eeting}s, > > Geert MBR, Sergei