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| author | James Morris <james.l.morris@oracle.com> | 2017-03-28 11:03:35 +1100 |
|---|---|---|
| committer | James Morris <james.l.morris@oracle.com> | 2017-03-28 11:03:35 +1100 |
| commit | 840c91dc6a13b160f5b6e5c79c430dffac11c945 (patch) | |
| tree | 5309824f4531b2611a575e7971a935d2e95feb02 /drivers/usb/musb/musb_cppi41.c | |
| parent | 3dfc9b02864b19f4dab376f14479ee4ad1de6c9e (diff) | |
| parent | c02ed2e75ef4c74e41e421acb4ef1494671585e8 (diff) | |
| download | linux-840c91dc6a13b160f5b6e5c79c430dffac11c945.tar.gz | |
update to v4.11-rc4 due to memory corruption bug in rc2
Diffstat (limited to 'drivers/usb/musb/musb_cppi41.c')
| -rw-r--r-- | drivers/usb/musb/musb_cppi41.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c index 00e272bfee39..355655f8a3fb 100644 --- a/drivers/usb/musb/musb_cppi41.c +++ b/drivers/usb/musb/musb_cppi41.c @@ -238,8 +238,27 @@ static void cppi41_dma_callback(void *private_data, transferred < cppi41_channel->packet_sz) cppi41_channel->prog_len = 0; - if (cppi41_channel->is_tx) - empty = musb_is_tx_fifo_empty(hw_ep); + if (cppi41_channel->is_tx) { + u8 type; + + if (is_host_active(musb)) + type = hw_ep->out_qh->type; + else + type = hw_ep->ep_in.type; + + if (type == USB_ENDPOINT_XFER_ISOC) + /* + * Don't use the early-TX-interrupt workaround below + * for Isoch transfter. Since Isoch are periodic + * transfer, by the time the next transfer is + * scheduled, the current one should be done already. + * + * This avoids audio playback underrun issue. + */ + empty = true; + else + empty = musb_is_tx_fifo_empty(hw_ep); + } if (!cppi41_channel->is_tx || empty) { cppi41_trans_done(cppi41_channel); |