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| author | Grant Likely <grant.likely@secretlab.ca> | 2010-01-29 00:38:25 +0300 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2010-01-29 00:38:25 +0300 |
| commit | 0ada0a73120c28cc432bcdbac061781465c2f48f (patch) | |
| tree | d17cadd4ea47e25d9e48e7d409a39c84268fbd27 /drivers/serial/pmac_zilog.c | |
| parent | 6016a363f6b56b46b24655bcfc0499b715851cf3 (diff) | |
| parent | 92dcffb916d309aa01778bf8963a6932e4014d07 (diff) | |
| download | linux-0ada0a73120c28cc432bcdbac061781465c2f48f.tar.xz | |
Merge commit 'v2.6.33-rc5' into secretlab/test-devicetree
Diffstat (limited to 'drivers/serial/pmac_zilog.c')
| -rw-r--r-- | drivers/serial/pmac_zilog.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/serial/pmac_zilog.c b/drivers/serial/pmac_zilog.c index 0700cd10b97c..683e66f18e8c 100644 --- a/drivers/serial/pmac_zilog.c +++ b/drivers/serial/pmac_zilog.c @@ -411,6 +411,17 @@ static void pmz_transmit_chars(struct uart_pmac_port *uap) goto ack_tx_int; } + /* Under some circumstances, we see interrupts reported for + * a closed channel. The interrupt mask in R1 is clear, but + * R3 still signals the interrupts and we see them when taking + * an interrupt for the other channel (this could be a qemu + * bug but since the ESCC doc doesn't specify precsiely whether + * R3 interrup status bits are masked by R1 interrupt enable + * bits, better safe than sorry). --BenH. + */ + if (!ZS_IS_OPEN(uap)) + goto ack_tx_int; + if (uap->port.x_char) { uap->flags |= PMACZILOG_FLAG_TX_ACTIVE; write_zsdata(uap, uap->port.x_char); |