linux-kernel - [PATCH 2/2] USB: ehci_brcm_hub_control: replace wIndex-1 with temp

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Message-Id: <20211105083357.29715-1-tcs_kernel@tencent.com>
Date:   Fri,  5 Nov 2021 16:33:57 +0800
From:   Haimin Zhang <tcs.kernel@...il.com>
To:     gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org
Cc:     Haimin Zhang <tcs_kernel@...cent.com>,
        TCS Robot <tcs_robot@...cent.com>
Subject: [PATCH 2/2] USB: ehci_brcm_hub_control: replace wIndex-1 with temp

In function `ehci_brcm_hub_control`, like following code,  
it filters out the case where the upper byte of wIndex is nonzero, 
so it need be replaced with temp.
```
	if ((typeReq == GetPortStatus) &&
	    (wIndex && wIndex <= ports) &&       // need to be replaced
	    ehci->reset_done[wIndex-1] &&
	    time_after_eq(jiffies, ehci->reset_done[wIndex-1]) &&
	    (ehci_readl(ehci, status_reg) & PORT_RESUME)) {
```

Signed-off-by: Haimin Zhang <tcs_kernel@...cent.com>
Reported-by: TCS Robot <tcs_robot@...cent.com>
---
 drivers/usb/host/ehci-brcm.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/host/ehci-brcm.c b/drivers/usb/host/ehci-brcm.c
index a1e3290e5459..efcfca162126 100644
--- a/drivers/usb/host/ehci-brcm.c
+++ b/drivers/usb/host/ehci-brcm.c
@@ -73,9 +73,9 @@ static int ehci_brcm_hub_control(
 	 * of RESUME
 	 */
 	if ((typeReq == GetPortStatus) &&
-	    (wIndex && wIndex <= ports) &&
-	    ehci->reset_done[wIndex-1] &&
-	    time_after_eq(jiffies, ehci->reset_done[wIndex-1]) &&
+	    (temp < ports) &&
+	    ehci->reset_done[temp] &&
+	    time_after_eq(jiffies, ehci->reset_done[temp]) &&
 	    (ehci_readl(ehci, status_reg) & PORT_RESUME)) {
 
 		/*
-- 
2.30.1 (Apple Git-130)