From 3de2685f0c395a56b909dbefd40fb287c9df31b2 Mon Sep 17 00:00:00 2001 From: John Youn Date: Mon, 23 May 2016 11:32:45 -0700 Subject: [PATCH] usb: dwc3: gadget: Fix truncated cast issue From sparse: warning: cast truncates bits from constant value (100 becomes 0) The DWC3_TRB_NUM constant is too big for u8. Do the calculation a slightly different way that should still be optimized out for the case where DWC3_TRB_NUM == 256. Signed-off-by: John Youn Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index fbc796892f6b..d0f74583c955 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -882,7 +882,7 @@ static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep) } trbs_left = dep->trb_dequeue - dep->trb_enqueue; - trbs_left %= DWC3_TRB_NUM; + trbs_left &= (DWC3_TRB_NUM - 1); if (dep->trb_dequeue < dep->trb_enqueue) trbs_left--;