linux-kernel - [PATCH -next] usb: host: ehci-sched: Remove ununsed function tt_start

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Date:   Wed, 9 Sep 2020 21:44:05 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <stern@...land.harvard.edu>, <gregkh@...uxfoundation.org>,
        <gustavoars@...nel.org>, <yuehaibing@...wei.com>
CC:     <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH -next] usb: host: ehci-sched: Remove ununsed function tt_start_uframe()

commit b35c5009bbf6 ("USB: EHCI: create per-TT bandwidth tables")
left behind this, remove it.

Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 drivers/usb/host/ehci-sched.c | 20 --------------------
 1 file changed, 20 deletions(-)

diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c
index 847979f265b1..6dfb242f9a4b 100644
--- a/drivers/usb/host/ehci-sched.c
+++ b/drivers/usb/host/ehci-sched.c
@@ -307,26 +307,6 @@ static int __maybe_unused same_tt(struct usb_device *dev1,
 
 #ifdef CONFIG_USB_EHCI_TT_NEWSCHED
 
-/* Which uframe does the low/fullspeed transfer start in?
- *
- * The parameter is the mask of ssplits in "H-frame" terms
- * and this returns the transfer start uframe in "B-frame" terms,
- * which allows both to match, e.g. a ssplit in "H-frame" uframe 0
- * will cause a transfer in "B-frame" uframe 0.  "B-frames" lag
- * "H-frames" by 1 uframe.  See the EHCI spec sec 4.5 and figure 4.7.
- */
-static inline unsigned char tt_start_uframe(struct ehci_hcd *ehci, __hc32 mask)
-{
-	unsigned char smask = hc32_to_cpu(ehci, mask) & QH_SMASK;
-
-	if (!smask) {
-		ehci_err(ehci, "invalid empty smask!\n");
-		/* uframe 7 can't have bw so this will indicate failure */
-		return 7;
-	}
-	return ffs(smask) - 1;
-}
-
 static const unsigned char
 max_tt_usecs[] = { 125, 125, 125, 125, 125, 125, 30, 0 };
 
-- 
2.17.1