diff options
| author | Jamie Iles <jamie.iles@oss.qualcomm.com> | 2025-11-07 10:44:37 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-12-07 06:09:35 +0900 |
| commit | 5a0dcabc8a1463a09bcdb82e973551b7cf9b8479 (patch) | |
| tree | 3239252b6eba014a8240588ff511f50ddae7c2e1 | |
| parent | ed69c3db499ca29a5c7769110cf9c1dbc4c9c6a3 (diff) | |
drivers/usb/dwc3: fix PCI parent check
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.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/dwc3/core.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 488cb16acd67..c69a0948fa48 100644 --- 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_device *pdev) 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) |