diff options
| author | Mark A. Greer <mgreer@animalcreek.com> | 2014-09-02 15:12:29 -0700 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2014-09-07 23:13:43 +0200 |
| commit | 0e840ed59ba79670b66bba8c1d50b6f67e72d3fb (patch) | |
| tree | 7b20b0b75f61776f7b55fd31e270339f16832e3a /drivers/nfc/trf7970a.c | |
| parent | 7a1e5552af61dce180f70c6fafe31553254b3728 (diff) | |
NFC: trf7970a: Only fill FIFO if there is space
Handle the case where trf7970a_fill_fifo() is
called but there is no room in the FIFO for
more TX data. When this happens, wait for
another interrupt indicating that there is
now space (and set a timer in case that
interrupt never occurs).
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/nfc/trf7970a.c')
| -rw-r--r-- | drivers/nfc/trf7970a.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c index 8a13daf97747..e9e961fe6756 100644 --- a/drivers/nfc/trf7970a.c +++ b/drivers/nfc/trf7970a.c @@ -580,6 +580,12 @@ static void trf7970a_fill_fifo(struct trf7970a *trf) /* Calculate how much more data can be written to the fifo */ len = TRF7970A_FIFO_SIZE - fifo_bytes; + if (!len) { + schedule_delayed_work(&trf->timeout_work, + msecs_to_jiffies(TRF7970A_WAIT_FOR_FIFO_DRAIN_TIMEOUT)); + return; + } + len = min(skb->len, len); prefix = TRF7970A_CMD_BIT_CONTINUOUS | TRF7970A_FIFO_IO_REGISTER; |