gru: update to rev 0.9 of gru spec
Update GRU driver to the latest version of the GRU spec. This consists
of minor updates:
- changes & additions to error status bits
- new restriction on handling of TLB misses while in FMM mode
- new field (not used by software) in TFH
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c
index 8443e90..a4898076 100644
--- a/drivers/misc/sgi-gru/grufault.c
+++ b/drivers/misc/sgi-gru/grufault.c
@@ -339,8 +339,12 @@
* Might be a hardware race OR a stupid user. Ignore FMM because FMM
* is a transient state.
*/
- if (tfh->status != TFHSTATUS_EXCEPTION)
- goto failnoexception;
+ if (tfh->status != TFHSTATUS_EXCEPTION) {
+ gru_flush_cache(tfh);
+ if (tfh->status != TFHSTATUS_EXCEPTION)
+ goto failnoexception;
+ STAT(tfh_stale_on_fault);
+ }
if (tfh->state == TFHSTATE_IDLE)
goto failidle;
if (tfh->state == TFHSTATE_MISS_FMM && cb)