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| author |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-06-08 10:49:28 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-06-08 10:49:28 -0700 |
| commit | 00fda1682efdbd62a20a8a21aee52d994c323c7f (patch) | |
| tree | f49cee6c892019f193bf29985604951dd81ea94d /drivers/tty/serial/imx.c | |
| parent | tty: move linux/gsmmux.h to uapi (diff) | |
| parent | Linux 4.1-rc7 (diff) | |
| download | linux-dev-00fda1682efdbd62a20a8a21aee52d994c323c7f.tar.xz linux-dev-00fda1682efdbd62a20a8a21aee52d994c323c7f.zip | |
Merge 4.1-rc7 into tty-next
This fixes up a merge issue with the amba-pl011.c driver, and we want
the fixes in this branch as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/imx.c')
| -rw-r--r-- | drivers/tty/serial/imx.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 91e36bcfde74..2c90dc31bfaa 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -910,6 +910,14 @@ static void dma_rx_callback(void *data) status = dmaengine_tx_status(chan, (dma_cookie_t)0, &state); count = RX_BUF_SIZE - state.residue; + + if (readl(sport->port.membase + USR2) & USR2_IDLE) { + /* In condition [3] the SDMA counted up too early */ + count--; + + writel(USR2_IDLE, sport->port.membase + USR2); + } + dev_dbg(sport->port.dev, "We get %d bytes.\n", count); if (count) { |