From: Claudiu Beznea claudiu.beznea@microchip.com
stable inclusion from stable-5.10.58 commit 5b4318885a4388b6b7c9227be53b8411bb1457ac bugzilla: 176984 https://gitee.com/openeuler/kernel/issues/I4E2P4
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit 00de6a572f30ee93cad7e0704ec4232e5e72bda8 upstream.
On SAMA7G5 suspending ports will cut the access to OHCI registers and any subsequent access to them will lead to CPU being blocked trying to access that memory. Same thing happens on resume: if OHCI memory is accessed before resuming ports the CPU will block on that access. The OCHI memory is accessed on suspend/resume though ohci_suspend()/ohci_resume().
Acked-by: Alan Stern stern@rowland.harvard.edu Signed-off-by: Claudiu Beznea claudiu.beznea@microchip.com Cc: stable stable@vger.kernel.org Link: https://lore.kernel.org/r/20210721132905.1970713-1-claudiu.beznea@microchip.... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Chen Jun chenjun102@huawei.com --- drivers/usb/host/ohci-at91.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c index 0487a4b0501e..99e994fd3d1d 100644 --- a/drivers/usb/host/ohci-at91.c +++ b/drivers/usb/host/ohci-at91.c @@ -606,8 +606,6 @@ ohci_hcd_at91_drv_suspend(struct device *dev) if (ohci_at91->wakeup) enable_irq_wake(hcd->irq);
- ohci_at91_port_suspend(ohci_at91->sfr_regmap, 1); - ret = ohci_suspend(hcd, ohci_at91->wakeup); if (ret) { if (ohci_at91->wakeup) @@ -627,7 +625,10 @@ ohci_hcd_at91_drv_suspend(struct device *dev) /* flush the writes */ (void) ohci_readl (ohci, &ohci->regs->control); msleep(1); + ohci_at91_port_suspend(ohci_at91->sfr_regmap, 1); at91_stop_clock(ohci_at91); + } else { + ohci_at91_port_suspend(ohci_at91->sfr_regmap, 1); }
return ret; @@ -639,6 +640,8 @@ ohci_hcd_at91_drv_resume(struct device *dev) struct usb_hcd *hcd = dev_get_drvdata(dev); struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd);
+ ohci_at91_port_suspend(ohci_at91->sfr_regmap, 0); + if (ohci_at91->wakeup) disable_irq_wake(hcd->irq); else @@ -646,8 +649,6 @@ ohci_hcd_at91_drv_resume(struct device *dev)
ohci_resume(hcd, false);
- ohci_at91_port_suspend(ohci_at91->sfr_regmap, 0); - return 0; }