From: Jamie Iles jamie.iles@oss.qualcomm.com
The sysdev_is_parent check was being used to infer PCI devices that have the DMA mask set from the PCI capabilities, but sysdev_is_parent is also used for non-PCI ACPI devices in which case the DMA mask would be the bus default or as set by the _DMA method.
Without this fix the DMA mask would default to 32-bits and so allocation would fail if there was no DRAM below 4GB.
Fixes: 47ce45906ca9 ("usb: dwc3: leave default DMA for PCI devices") Cc: stable@vger.kernel.org Signed-off-by: Jamie Iles jamie.iles@oss.qualcomm.com Signed-off-by: Punit Agrawal punit.agrawal@oss.qualcomm.com Acked-by: Thinh Nguyen Thinh.Nguyen@synopsys.com --- v1[0] -> v2: * Added tags * Cc stable
[0] https://lore.kernel.org/all/20251105145801.485371-1-punit.agrawal@oss.qualco...
drivers/usb/dwc3/core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index ae140c356295..c2ce2f5e60a1 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -25,6 +25,7 @@ #include <linux/of.h> #include <linux/of_graph.h> #include <linux/acpi.h> +#include <linux/pci.h> #include <linux/pinctrl/consumer.h> #include <linux/pinctrl/devinfo.h> #include <linux/reset.h> @@ -2241,7 +2242,7 @@ int dwc3_core_probe(const struct dwc3_probe_data *data) dev_set_drvdata(dev, dwc); dwc3_cache_hwparams(dwc);
- if (!dwc->sysdev_is_parent && + if (!dev_is_pci(dwc->sysdev) && DWC3_GHWPARAMS0_AWIDTH(dwc->hwparams.hwparams0) == 64) { ret = dma_set_mask_and_coherent(dwc->sysdev, DMA_BIT_MASK(64)); if (ret)