drivers/usb/dwc3: fix PCI parent check

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: 47ce459 ("usb: dwc3: leave default DMA for PCI devices")
Cc: stable <[email protected]>
Signed-off-by: Jamie Iles <[email protected]>
Signed-off-by: Punit Agrawal <[email protected]>
Acked-by: Thinh Nguyen <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Jamie Iles

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)