6.6-stable review patch. If anyone has any objections, please let me know.
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From: Henry Lin henryl@nvidia.com
commit 7d381137cb6ecf558ef6698c7730ddd482d4c8f2 upstream.
If USB virtualizatoin is enabled, USB2 ports are shared between all Virtual Functions. The USB2 port number owned by an USB2 root hub in a Virtual Function may be less than total USB2 phy number supported by the Tegra XUSB controller.
Using total USB2 phy number as port number to check all PORTSC values would cause invalid memory access.
[ 116.923438] Unable to handle kernel paging request at virtual address 006c622f7665642f ... [ 117.213640] Call trace: [ 117.216783] tegra_xusb_enter_elpg+0x23c/0x658 [ 117.222021] tegra_xusb_runtime_suspend+0x40/0x68 [ 117.227260] pm_generic_runtime_suspend+0x30/0x50 [ 117.232847] __rpm_callback+0x84/0x3c0 [ 117.237038] rpm_suspend+0x2dc/0x740 [ 117.241229] pm_runtime_work+0xa0/0xb8 [ 117.245769] process_scheduled_works+0x24c/0x478 [ 117.251007] worker_thread+0x23c/0x328 [ 117.255547] kthread+0x104/0x1b0 [ 117.259389] ret_from_fork+0x10/0x20 [ 117.263582] Code: 54000222 f9461ae8 f8747908 b4ffff48 (f9400100)
Cc: stable@vger.kernel.org # v6.3+ Fixes: a30951d31b25 ("xhci: tegra: USB2 pad power controls") Signed-off-by: Henry Lin henryl@nvidia.com Link: https://lore.kernel.org/r/20241014042134.27664-1-henryl@nvidia.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/host/xhci-tegra.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/host/xhci-tegra.c +++ b/drivers/usb/host/xhci-tegra.c @@ -2183,7 +2183,7 @@ static int tegra_xusb_enter_elpg(struct goto out; }
- for (i = 0; i < tegra->num_usb_phys; i++) { + for (i = 0; i < xhci->usb2_rhub.num_ports; i++) { if (!xhci->usb2_rhub.ports[i]) continue; portsc = readl(xhci->usb2_rhub.ports[i]->addr);