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 :-) -- balbi
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