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Message-Id: <dc2239bf4d037bf85bb1821354534793c3ba2270.1528423341.git.fthain@telegraphics.com.au>
Date: Thu, 7 Jun 2018 22:24:28 -0400 (EDT)
From: Finn Thain <fthain@...egraphics.com.au>
To: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Michael Schmitz <schmitzmic@...il.com>,
<linuxppc-dev@...ts.ozlabs.org>, <linux-m68k@...ts.linux-m68k.org>,
<linux-kernel@...r.kernel.org>
Subject: [PATCH v2 03/12] macintosh/via-pmu: Don't clear shift register
interrupt flag twice
The shift register interrupt flag gets cleared in via_pmu_interrupt()
and once again in pmu_sr_intr(). Fix this theoretical race condition.
Tested-by: Stan Johnson <userm57@...oo.com>
Signed-off-by: Finn Thain <fthain@...egraphics.com.au>
Reviewed-by: Geert Uytterhoeven <geert@...ux-m68k.org>
---
drivers/macintosh/via-pmu.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c
index 74065ea410bd..4c1bae5380c2 100644
--- a/drivers/macintosh/via-pmu.c
+++ b/drivers/macintosh/via-pmu.c
@@ -1458,7 +1458,6 @@ pmu_sr_intr(void)
if (in_8(&via[B]) & TREQ) {
printk(KERN_ERR "PMU: spurious SR intr (%x)\n", in_8(&via[B]));
- out_8(&via[IFR], SR_INT);
return NULL;
}
/* The ack may not yet be low when we get the interrupt */
--
2.16.4
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