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usb: dwc3: imx: avoid calling imx suspend/resume callbacks twice

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If a runtime suspend is executed followed by a system suspend, the driver
may invoke dwc3_imx_suspend() twice, which causes enable_irq() to be
called twice as well. This leads to an unbalanced IRQ state and may
trigger warnings or malfunction. Prevent this by checking the pm_suspended
flag before running the imx suspend/resume path.

Fixes: 76fc9452a6 ("usb: dwc3: introduce flatten model driver of i.MX Soc")
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://patch.msgid.link/20260317030546.1665206-1-xu.yang_2@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Xu Yang 2026-03-17 11:05:46 +08:00 committed by Greg Kroah-Hartman
parent d3d959404e
commit 84db3719d2
1 changed files with 6 additions and 0 deletions
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6
drivers/usb/dwc3/dwc3-imx.c
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@ -288,6 +288,9 @@ static void dwc3_imx_remove(struct platform_device *pdev)
static void dwc3_imx_suspend(struct dwc3_imx *dwc_imx, pm_message_t msg)
{
if (dwc_imx->pm_suspended)
return;
if (PMSG_IS_AUTO(msg) || device_may_wakeup(dwc_imx->dev))
dwc3_imx_wakeup_enable(dwc_imx, msg);
@ -299,6 +302,9 @@ static void dwc3_imx_resume(struct dwc3_imx *dwc_imx, pm_message_t msg)
{
struct dwc3 *dwc = &dwc_imx->dwc;
if (!dwc_imx->pm_suspended)
return;
dwc_imx->pm_suspended = false;
if (!dwc_imx->wakeup_pending)
disable_irq_nosync(dwc_imx->irq);