Commit d102444c authored by Thinh Nguyen's avatar Thinh Nguyen Committed by Felipe Balbi
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usb: dwc3: debugfs: Print/set link state for peripheral mode 



Current implementation only prints/sets the link state for peripheral
mode only. Check and prevent printing bogus link state if the current
mode of operation is not peripheral.

Signed-off-by: default avatarThinh Nguyen <thinhn@synopsys.com>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
parent 0d36dede

drivers/usb/dwc3/debugfs.c

+13 −0
Original line number Diff line number Diff line
@@ -542,6 +542,13 @@ static int dwc3_link_state_show(struct seq_file *s, void *unused) 
	u8			speed;



	spin_lock_irqsave(&dwc->lock, flags);

	reg = dwc3_readl(dwc->regs, DWC3_GSTS);

	if (DWC3_GSTS_CURMOD(reg) != DWC3_GSTS_CURMOD_DEVICE) {

		seq_puts(s, "Not available\n");

		spin_unlock_irqrestore(&dwc->lock, flags);

		return 0;

	}



	reg = dwc3_readl(dwc->regs, DWC3_DSTS);

	state = DWC3_DSTS_USBLNKST(reg);

	speed = reg & DWC3_DSTS_CONNECTSPD;
@@ -589,6 +596,12 @@ static ssize_t dwc3_link_state_write(struct file *file, 
		return -EINVAL;



	spin_lock_irqsave(&dwc->lock, flags);

	reg = dwc3_readl(dwc->regs, DWC3_GSTS);

	if (DWC3_GSTS_CURMOD(reg) != DWC3_GSTS_CURMOD_DEVICE) {

		spin_unlock_irqrestore(&dwc->lock, flags);

		return -EINVAL;

	}



	reg = dwc3_readl(dwc->regs, DWC3_DSTS);

	speed = reg & DWC3_DSTS_CONNECTSPD;