Hi, Balbi, > -----Original Message----- > From: Felipe Balbi [mailto:felipe.balbi@xxxxxxxxxxxxxxx] > Sent: Wednesday, December 07, 2016 9:39 PM > To: Jerry Huang <jerry.huang@xxxxxxx>; stern@xxxxxxxxxxxxxxxxxxx; > linux-usb@xxxxxxxxxxxxxxx; Mathias Nyman > <mathias.nyman@xxxxxxxxxxxxxxx>; Arnd Bergmann <arnd@xxxxxxxx> > Cc: Sriram Dash <sriram.dash@xxxxxxx>; Greg Kroah-Hartman > <gregkh@xxxxxxxxxxxxxxxxxxx> > Subject: RE: USB3.0 DWC3 can't work with latest Linux-4.9.rc7 > > > Hi, > > Jerry Huang <jerry.huang@xxxxxxx> writes: > >> Jerry Huang <jerry.huang@xxxxxxx> writes: > >> >> Jerry Huang <jerry.huang@xxxxxxx> writes: > >> >> > Hi, Balbi, > >> >> > Sorry for later responding. > >> >> > I tested Linux 4.8, 4.7, 4.6 and 4.5, has the same issue: > >> >> > [ 0.756166] xhci-hcd: probe of xhci-hcd.0.auto failed with error -5 > >> >> > > >> >> > Then I found one patch (dwc3 initiated xhci probe problem in > >> >> > arm64 > >> >> > 4.4 > >> >> kernel due to DMA setup) as below link, and I applied this patch > >> >> to Linux-4.5, the USB3.0 worked well! Therefore I applied this > >> >> patch to Linux-4.9-rc7, and the USB3.0 works well, too! Which used > >> >> of_dma_configure(&xhci->dev, > >> >> dwc->dev->of_node) to set dma. > >> >> > https://patches.linaro.org/patch/65892/ > >> >> > > >> >> > However, in Linux-4.9-rc8, I found these 6 patches applied: > >> >> > https://patchwork.kernel.org/patch/9434163/ > >> >> > https://patchwork.kernel.org/patch/9434155/ > >> >> > https://patchwork.kernel.org/patch/9434131/ > >> >> > https://patchwork.kernel.org/patch/9434165/ > >> >> > https://patchwork.kernel.org/patch/9434167/ > >> >> > https://patchwork.kernel.org/patch/9434133/ > >> >> > and the commit ID are: > >> >> > 9863f279c1d48e366a179e76683247f239b30975 > >> >> > 0abcfafea32452f1d07901320efa8c17470dbeed > >> >> > ec3a36d441f2adcb8a0d3f6534ac488f2202c87a > >> >> > e9d10c536b26732d38d59fa3639b85bcd819837e > >> >> > 60478aead82d761c71a2a402b3fd2817af9e57ac > >> >> > 21f57eb38129042d2910d1e9b5fd36f3eea93637 > >> >> > > >> >> > And I got the below error when I attached one USB3.0 disk (Just > >> >> > USB2.0 > >> >> disk can work). From above 6 patches, it seems remove > >> >> dma_set_coherent_mask from file drivers/usb/dwc3/host.c. > >> >> > > >> >> > usb 4-1: new SuperSpeed USB device number 2 using xhci-hcd > >> >> > [ 16.224264] usb 4-1: device descriptor read/8, error -61 > >> >> > [ 16.336179] usb 4-1: new SuperSpeed USB device number 2 using > xhci- > >> >> hcd > >> >> > [ 16.360257] usb 4-1: device descriptor read/8, error -61 > >> >> > [ 16.652196] usb 4-1: new SuperSpeed USB device number 3 using > xhci- > >> >> hcd > >> >> > [ 16.676256] usb 4-1: device descriptor read/8, error -61 > >> >> > [ 16.788179] usb 4-1: new SuperSpeed USB device number 3 using > xhci- > >> >> hcd > >> >> > [ 16.812255] usb 4-1: device descriptor read/8, error -61 > >> >> > > >> >> > So, how to handle this issue? > >> >> > >> >> oh, it's the DMA thing. We have patches going to next for this. > >> >> Arnd, do you know if next has all missing pieces? There was > >> >> something pending on XHCI IIRC, right? > >> > So, there are some patches for this issue? Where can I find it? I > >> > need these > >> patches for my work. > >> > >> https://lkml.org/lkml/2016/11/17/339 > > You means these below 6 patches? They have been applied to Linux-4.9- > rc8. > > Based on Linux-4.9-rc8, I got the error when I connect USB3.0 disk to board > (USB2.0 disk works well): > > [ 16.360257] usb 4-1: device descriptor read/8, error -61 > > So, I think all these 6 patches did not set the USB3.0 DMA coherent > > correctly, and we need another patch to handle it. > > okay, please prepare one such patch :-) We still need this patch, after applying it to Linux-4.9-rc8, the USB3.0 can work well. https://patches.linaro.org/patch/65892/ dwc3 initiated xhci probe problem in arm64 4.4 kernel due to DMA setup > -- > balbi -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
