diff options
| author | niruiyu <niruiyu@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-03-10 09:20:17 +0000 |
|---|---|---|
| committer | niruiyu <niruiyu@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-03-10 09:20:17 +0000 |
| commit | 711d0721b5e4c1ebc07ddf749186c1e3e80cc7e0 (patch) | |
| tree | c9ce582240c2b5b822e03fe78a488051b9d68449 | |
| parent | 1fafcca8b4f0f027638355ef67e2efab2e1d780b (diff) | |
| download | edk2-platforms-711d0721b5e4c1ebc07ddf749186c1e3e80cc7e0.tar.xz | |
Fix the hardware flow control logic in SerialIo driver.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10228 6f19259b-4bc3-4df7-8a09-765794883524
| -rw-r--r-- | IntelFrameworkModulePkg/Bus/Isa/IsaSerialDxe/Serial.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/IntelFrameworkModulePkg/Bus/Isa/IsaSerialDxe/Serial.c b/IntelFrameworkModulePkg/Bus/Isa/IsaSerialDxe/Serial.c index 03dae25b2d..04d6373592 100644 --- a/IntelFrameworkModulePkg/Bus/Isa/IsaSerialDxe/Serial.c +++ b/IntelFrameworkModulePkg/Bus/Isa/IsaSerialDxe/Serial.c @@ -909,7 +909,7 @@ IsaSerialReceiveTransmit ( //
TimeOut = 0;
Msr.Data = READ_MSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);
- while ((Msr.Bits.Dcd == 1) && ((Msr.Bits.Cts == 0) || FeaturePcdGet(PcdIsaBusSerialUseHalfHandshake))) {
+ while ((Msr.Bits.Dcd == 1) && ((Msr.Bits.Cts == 0) ^ FeaturePcdGet(PcdIsaBusSerialUseHalfHandshake))) {
gBS->Stall (TIMEOUT_STALL_INTERVAL);
TimeOut++;
if (TimeOut > 5) {
@@ -919,7 +919,7 @@ IsaSerialReceiveTransmit ( Msr.Data = READ_MSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);
}
- if ((Msr.Bits.Dcd == 0) && ((Msr.Bits.Cts == 1) || FeaturePcdGet(PcdIsaBusSerialUseHalfHandshake))) {
+ if ((Msr.Bits.Dcd == 0) || ((Msr.Bits.Cts == 1) ^ FeaturePcdGet(PcdIsaBusSerialUseHalfHandshake))) {
IsaSerialFifoRemove (&SerialDevice->Transmit, &Data);
WRITE_THR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Data);
}
|