From: Fabio Aiuto Date: Sat, 13 Nov 2021 14:29:59 +0000 (+0100) Subject: usb: dwc3: leave default DMA for PCI devices X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a6cc2445103ef6c406e735cb545b44e3edeb18bb;p=linux.git usb: dwc3: leave default DMA for PCI devices commit 47ce45906ca9870cf5267261f155fb7c70307cf0 upstream. in case of a PCI dwc3 controller, leave the default DMA mask. Calling of a 64 bit DMA mask breaks the driver on cherrytrail based tablets like Cyberbook T116. Fixes: 45d39448b4d0 ("usb: dwc3: support 64 bit DMA in platform driver") Cc: stable Reported-by: Hans De Goede Tested-by: Fabio Aiuto Tested-by: Hans de Goede Signed-off-by: Fabio Aiuto Link: https://lore.kernel.org/r/20211113142959.27191-1-fabioaiuto83@gmail.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 0104a80b185e1..357b7805896e7 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1565,9 +1565,11 @@ static int dwc3_probe(struct platform_device *pdev) dwc3_get_properties(dwc); - ret = dma_set_mask_and_coherent(dwc->sysdev, DMA_BIT_MASK(64)); - if (ret) - return ret; + if (!dwc->sysdev_is_parent) { + ret = dma_set_mask_and_coherent(dwc->sysdev, DMA_BIT_MASK(64)); + if (ret) + return ret; + } dwc->reset = devm_reset_control_array_get_optional_shared(dev); if (IS_ERR(dwc->reset))