admin/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-12-07 20:06:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

usb: dwc3: dwc3_power_off_all_roothub_ports: Use ioremap_np when required

Browse Source 
On Apple Silicon machines we can't use ioremap() / Device-nGnRE to map most
regions but must use ioremap_np() / Device-nGnRnE whenever
IORESOURCE_MEM_NONPOSTED is set. Make sure this is also done inside
dwc3_power_off_all_roothub_ports to prevent SErrors.

Fixes: 2d2a334952 ("usb: dwc3: Add workaround for host mode VBUS glitch when boot")
Cc: stable@kernel.org
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Sven Peter <sven@kernel.org>
Link: https://patch.msgid.link/20251015-b4-aplpe-dwc3-v2-2-cbd65a2d511a@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sven Peter
2025-10-15 15:40:42 +00:00
committed by Greg Kroah-Hartman
parent 71e13cc1c3
commit 5ed9cc7143
1 changed files with 4 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/usb/dwc3/host.c
View File

@@ -37,7 +37,10 @@ static void dwc3_power_off_all_roothub_ports(struct dwc3 *dwc)
/* xhci regs are not mapped yet, do it temporarily here */
if (dwc->xhci_resources[0].start) {
xhci_regs = ioremap(dwc->xhci_resources[0].start, DWC3_XHCI_REGS_END);
if (dwc->xhci_resources[0].flags & IORESOURCE_MEM_NONPOSTED)
xhci_regs = ioremap_np(dwc->xhci_resources[0].start, DWC3_XHCI_REGS_END);
else
xhci_regs = ioremap(dwc->xhci_resources[0].start, DWC3_XHCI_REGS_END);
if (!xhci_regs) {
dev_err(dwc->dev, "Failed to ioremap xhci_regs\n");
return;