This is a note to let you know that I've just added the patch titled usb: host: xhci-plat: fix cannot work if R-Car Gen2/3 run on above 4GB phys to the 4.5-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-host-xhci-plat-fix-cannot-work-if-r-car-gen2-3-run-on-above-4gb-phys.patch and it can be found in the queue-4.5 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 5ad3b03e4910f9f62342956ecdc758c7af6b8699 Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> Date: Fri, 8 Apr 2016 16:25:08 +0300 Subject: usb: host: xhci-plat: fix cannot work if R-Car Gen2/3 run on above 4GB phys From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> commit 5ad3b03e4910f9f62342956ecdc758c7af6b8699 upstream. This patch fixes an issue that cannot work if R-Car Gen2/3 run on above 4GB physical memory environment to use a quirk XHCI_NO_64BIT_SUPPORT. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> Reviewed-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/host/xhci-plat.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -39,12 +39,25 @@ static const struct xhci_driver_override static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci) { + struct usb_hcd *hcd = xhci_to_hcd(xhci); + /* * As of now platform drivers don't provide MSI support so we ensure * here that the generic code does not try to make a pci_dev from our * dev struct in order to setup MSI */ xhci->quirks |= XHCI_PLAT; + + /* + * On R-Car Gen2 and Gen3, the AC64 bit (bit 0) of HCCPARAMS1 is set + * to 1. However, these SoCs don't support 64-bit address memory + * pointers. So, this driver clears the AC64 bit of xhci->hcc_params + * to call dma_set_coherent_mask(dev, DMA_BIT_MASK(32)) in + * xhci_gen_setup(). + */ + if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2) || + xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3)) + xhci->quirks |= XHCI_NO_64BIT_SUPPORT; } /* called during probe() after chip reset completes */ Patches currently in stable-queue which might be from yoshihiro.shimoda.uh@xxxxxxxxxxx are queue-4.5/usb-host-xhci-plat-make-enum-xhci_plat_type-start-at-a-non-zero-value.patch queue-4.5/usb-host-xhci-plat-fix-cannot-work-if-r-car-gen2-3-run-on-above-4gb-phys.patch queue-4.5/usb-host-xhci-add-a-new-quirk-xhci_no_64bit_support.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html