diff options
author | Frederic Danis <frederic.danis@linux.intel.com> | 2015-10-09 17:14:56 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-11-09 14:37:36 -0800 |
commit | 60288b005cd8eedc24e736db5068eb24c7422a7f (patch) | |
tree | 70f49c7a3a11cf7238717724a3251a1c533cabb3 | |
parent | f2a990e96966e1be8233fe1e285d00882a6708bc (diff) |
Revert "serial: 8250_dma: don't bother DMA with small transfers"
commit f967fc8f165fadb72166f2bd4785094b3ca21307 upstream.
This reverts commit 9119fba0cfeda6d415c9f068df66838a104b87cb.
This commit prevents from sending "big" file using Bluetooth.
When sending a lot of data quickly through the Bluetooth interface, and
after a variable amount of data sent, transfer fails with error:
kernel: [ 415.247453] Bluetooth: hci0 hardware error 0x00
Found on T100TA.
After reverting this commit, send works fine for any file size.
Signed-off-by: Frederic Danis <frederic.danis@linux.intel.com>
Fixes: 9119fba0cfed (serial: 8250_dma: don't bother DMA with small transfers)
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | drivers/tty/serial/8250/8250_dma.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c index 21d01a491405..e508939daea3 100644 --- a/drivers/tty/serial/8250/8250_dma.c +++ b/drivers/tty/serial/8250/8250_dma.c @@ -80,10 +80,6 @@ int serial8250_tx_dma(struct uart_8250_port *p) return 0; dma->tx_size = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE); - if (dma->tx_size < p->port.fifosize) { - ret = -EINVAL; - goto err; - } desc = dmaengine_prep_slave_single(dma->txchan, dma->tx_addr + xmit->tail, |