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UPSTREAM: usb: dwc3: gadget: Fix truncated cast issue

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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.

Change-Id: If6f9d66a7545230b0d0f21ab05dacd0f572f10b6
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Wu Liang feng <wulf@rock-chips.com>
(cherry picked from commit 3de2685f0c)
This commit is contained in:
John Youn 2016-05-23 11:32:45 -07:00 committed by Huang, Tao
parent 5e8ec28765
commit 9557d798b3
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/dwc3/gadget.c
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@ -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--;