linux-kernel - [164/244] tg3: Fix int selftest for recent devices.

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Message-Id: <20110928220142.593500295@clark.kroah.org>
Date:	Wed, 28 Sep 2011 15:02:08 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Matt Carlson <mcarlson@...adcom.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [164/244] tg3: Fix int selftest for recent devices.

3.0-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Matt Carlson <mcarlson@...adcom.com>

commit 3aa1cdf87c0b3f2345e75c474acc32ebbf0a4724 upstream.

This patch fixes interrupt selftest failures for recent devices (57765,
5717, 5718. 5719, 5720) by disabling MSI one-shot mode and applying the
status tag workaround to the selftest code.

Signed-off-by: Matt Carlson <mcarlson@...adcom.com>
Reviewed-by: Michael Chan <mchan@...adcom.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/net/tg3.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -8982,7 +8982,7 @@ static int tg3_test_interrupt(struct tg3
 	 * Turn off MSI one shot mode.  Otherwise this test has no
 	 * observable way to know whether the interrupt was delivered.
 	 */
-	if (tg3_flag(tp, 57765_PLUS) && tg3_flag(tp, USING_MSI)) {
+	if (tg3_flag(tp, 57765_PLUS)) {
 		val = tr32(MSGINT_MODE) | MSGINT_MODE_ONE_SHOT_DISABLE;
 		tw32(MSGINT_MODE, val);
 	}
@@ -9010,6 +9010,10 @@ static int tg3_test_interrupt(struct tg3
 			break;
 		}
 
+		if (tg3_flag(tp, 57765_PLUS) &&
+		    tnapi->hw_status->status_tag != tnapi->last_tag)
+			tw32_mailbox_f(tnapi->int_mbox, tnapi->last_tag << 24);
+
 		msleep(10);
 	}
 
@@ -9024,7 +9028,7 @@ static int tg3_test_interrupt(struct tg3
 
 	if (intr_ok) {
 		/* Reenable MSI one shot mode. */
-		if (tg3_flag(tp, 57765_PLUS) && tg3_flag(tp, USING_MSI)) {
+		if (tg3_flag(tp, 57765_PLUS)) {
 			val = tr32(MSGINT_MODE) & ~MSGINT_MODE_ONE_SHOT_DISABLE;
 			tw32(MSGINT_MODE, val);
 		}


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