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usb: musb: cppi41: exit early when tx fifo is empty

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as soon as we find out tx fifo is empty, there's
no need to break out of the loop just to have another
branch to complete the transfer. We can just complete
transfer and exit early.

Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi 2015-02-27 13:21:14 -06:00
parent 1b61625f8b
commit af63429cf0
1 changed files with 4 additions and 8 deletions
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12
drivers/usb/musb/musb_cppi41.c
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@ -280,19 +280,15 @@ static void cppi41_dma_callback(void *private_data)
do {
empty = musb_is_tx_fifo_empty(hw_ep);
if (empty)
break;
if (empty) {
cppi41_trans_done(cppi41_channel);
goto out;
}
wait--;
if (!wait)
break;
udelay(1);
} while (1);
empty = musb_is_tx_fifo_empty(hw_ep);
if (empty) {
cppi41_trans_done(cppi41_channel);
goto out;
}
}
list_add_tail(&cppi41_channel->tx_check,
&controller->early_tx_list);