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sata_nv: revert use of notifiers for now 

Commit 721449bf0d added support for using the
ADMA notifier bits to determine which commands to check for completion.
However there have been reports that this causes command timeouts in certain
cases. This is still being investigated. In addition, apparently the notifiers
won't work if ADMA is disabled on the other port as a result of an ATAPI device
being connected, and we don't handle this case properly.

For now, just restore the previous behavior of checking all active commands
to see if they are complete, without relying on the notifiers.

Signed-off-by: Robert Hancock <hancockr@shaw.ca>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Robert Hancock 2007-03-08 18:02:18 -06:00 committed by Jeff Garzik
parent 14d66ab7e2
commit 8ba5e4cbe4
1 changed files with 7 additions and 1 deletions
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8
drivers/ata/sata_nv.c
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@ -874,8 +874,14 @@ static irqreturn_t nv_adma_interrupt(int irq, void *dev_instance)
if (status & (NV_ADMA_STAT_DONE |
NV_ADMA_STAT_CPBERR)) {
u32 check_commands = notifier | notifier_error;
u32 check_commands;
int pos, error = 0;
if(ata_tag_valid(ap->active_tag))
check_commands = 1 << ap->active_tag;
else
check_commands = ap->sactive;
/** Check CPBs for completed commands */
while ((pos = ffs(check_commands)) && !error) {
pos--;