5.15-stable review patch. If anyone has any objections, please let me know.
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From: Jamie Iles jamie.iles@oss.qualcomm.com
commit 40f8d17eed7533ed2bbb5e3cc680049b19411b2e upstream.
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 stable@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 Link: https://patch.msgid.link/20251107104437.1602509-1-punit.agrawal@oss.qualcomm... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/dwc3/core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -24,6 +24,7 @@ #include <linux/dma-mapping.h> #include <linux/of.h> #include <linux/acpi.h> +#include <linux/pci.h> #include <linux/pinctrl/consumer.h> #include <linux/reset.h>
@@ -1667,7 +1668,7 @@ static int dwc3_probe(struct platform_de platform_set_drvdata(pdev, 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)