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Handle shared channels better.

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Try to avoid the spurios interrupts better.
This commit is contained in:
Søren Schmidt 2003-09-08 08:32:25 +00:00
parent 9855ae3844
commit 08c26854a3
1 changed files with 20 additions and 13 deletions
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33
sys/dev/ata/ata-lowlevel.c
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@ -270,22 +270,14 @@ ata_interrupt(void *data)
{
struct ata_channel *ch = (struct ata_channel *)data;
struct ata_request *request = ch->running;
u_int8_t status;
int length;
/* if we dont have a running request shout and ignore this interrupt */
if (request == NULL) {
if (bootverbose) {
printf("ata%d: spurious interrupt - ", device_get_unit(ch->dev));
if (request)
printf("request OK - ");
printf("status=0x%02x error=0x%02x reason=0x%02x\n",
ATA_IDX_INB(ch, ATA_ALTSTAT), ATA_IDX_INB(ch, ATA_ERROR),
ATA_IDX_INB(ch, ATA_IREASON));
}
/* if the channel is idle this interrupt is not for us (shared) */
if (ch->state == ATA_IDLE)
return;
}
/* if device is busy it didn't interrupt */
/* if device is busy it didn't interrupt, ignore interrupt (shared) */
if (ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_BUSY) {
DELAY(100);
if (!(ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_DRQ))
@ -293,7 +285,22 @@ ata_interrupt(void *data)
}
/* clear interrupt and get status */
request->status = ATA_IDX_INB(ch, ATA_STATUS);
status = ATA_IDX_INB(ch, ATA_STATUS);
/* if we dont have a running request shout and ignore this interrupt */
if (request == NULL) {
if (1 || bootverbose) {
printf("ata%d: spurious interrupt - ", device_get_unit(ch->dev));
if (request)
printf("request OK - ");
printf("status=0x%02x error=0x%02x reason=0x%02x\n",
status, ATA_IDX_INB(ch, ATA_ERROR),
ATA_IDX_INB(ch, ATA_IREASON));
}
return;
}
request->status = status;
switch (request->flags & (ATA_R_ATAPI | ATA_R_DMA)) {