[PATCH v1] usb: dwc3: core: Fix timeout check

[Varadarajan Narayanan]

dwc3_core_init loops 'timeout' times to check if the IP block is out
of reset using 'while (timeout--)'. If there is some issue and
the block doesn't come out of reset, the loop will run till
'timeout' becomes zero and the post decrement operator would set
timeout to 0xffffffff. Though the IP block is not out reset, the
subsequent if check 'if !timeout' would fail as timeout is not
equal to zero and the function proceeds with the initialization.

Make this a pre decrement to address this.

Signed-off-by: Varadarajan Narayanan <quic_varada at quicinc.com>
---
 drivers/usb/dwc3/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index a35b8c2f64..8f58e4ea2d 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -612,7 +612,7 @@ static int dwc3_core_init(struct dwc3 *dwc)
 	/* issue device SoftReset too */
 	timeout = 5000;
 	dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST);
-	while (timeout--) {
+	while (--timeout) {
 		reg = dwc3_readl(dwc->regs, DWC3_DCTL);
 		if (!(reg & DWC3_DCTL_CSFTRST))
 			break;
-- 
2.34.1