otherwise it gets stuck in a loop
so clear it when unsetting run when flush is set
void
IODBDMAStop( volatile IODBDMAChannelRegisters *registers)
{
IOSetDBDMAChannelControl( registers,
IOClearDBDMAChannelControlBits( kdbdmaRun )
| IOSetDBDMAChannelControlBits( kdbdmaFlush ));
DBDMA: writel 0x0000000000000b00 <= 0xa0002000
DBDMA: channel 0x16 reg 0x0
DBDMA: status 0x00002000
while( IOGetDBDMAChannelStatus( registers) & (
kdbdmaActive | kdbdmaFlush))
eieio();
DBDMA: readl 0x0000000000000b04 => 0x00002000
DBDMA: channel 0x16 reg 0x1
DBDMA: readl 0x0000000000000b04 => 0x00002000
DBDMA: channel 0x16 reg 0x1
DBDMA: readl 0x0000000000000b04 => 0x00002000
DBDMA: channel 0x16 reg 0x1
DBDMA: readl 0x0000000000000b04 => 0x00002000
DBDMA: channel 0x16 reg 0x1
it continues to get printed
}
Signed-off-by: Amadeusz Sławiński <amade@asmblr.net>
[agraf: replace tabs with spaces]
Signed-off-by: Alexander Graf <agraf@suse.de>
if ((ch->regs[DBDMA_STATUS] & RUN) && !(status & RUN)) {
/* RUN is cleared */
status &= ~(ACTIVE|DEAD);
+ if ((status & FLUSH) && ch->flush) {
+ ch->flush(&ch->io);
+ status &= ~FLUSH;
+ }
}
DBDMA_DPRINTF(" status 0x%08x\n", status);