diff options
| author | Felipe Balbi <balbi@ti.com> | 2015-02-27 22:21:14 +0300 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-03-10 23:33:32 +0300 |
| commit | af63429cf046210d7313805b579dd779d10ad1c0 (patch) | |
| tree | 1fb9054072c44aafcb6e5a71de648cb2fc5a15d7 /drivers/usb/musb/musb_cppi41.c | |
| parent | 1b61625f8b5d87caf9633d7dbfbaf1ea8270036d (diff) | |
| download | linux-af63429cf046210d7313805b579dd779d10ad1c0.tar.xz | |
usb: musb: cppi41: exit early when tx fifo is empty
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>
Diffstat (limited to 'drivers/usb/musb/musb_cppi41.c')
| -rw-r--r-- | drivers/usb/musb/musb_cppi41.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c index 73ac9835485d..4407f30d0b86 100644 --- a/drivers/usb/musb/musb_cppi41.c +++ b/drivers/usb/musb/musb_cppi41.c @@ -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); |