netdev - [PATCH] net: eth: altera: Resolve false errors from MSGDMA to TSE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <1429860727-1359-1-git-send-email-vbridger@opensource.altera.com>
Date:	Fri, 24 Apr 2015 02:32:07 -0500
From:	Vince Bridgers <vbridger@...nsource.altera.com>
To:	<netdev@...r.kernel.org>, <nios2-dev@...ts.rocketboards.org>,
	<linux-kernel@...r.kernel.org>
CC:	<vbridger@...era.com>, <cnphoon@...era.com>,
	<ennoerlangen@...il.com>,
	Vince Bridgers <vbridger@...nsource.altera.com>
Subject: [PATCH] net: eth: altera: Resolve false errors from MSGDMA to TSE

From: Chee Nouk Phoon <cnphoon@...era.com>

This patch resolves false errors from MSGDMA in TX mSGDMA MM to ST
mode, and is a continuation of the patch recently submitted by Andrea
Oetken. The MSGDMA had a logic bug that masked detection of this issue
prior to Quartus 14.1/Build 164. When the MSGDMA logic bug was addressed
in Quartus 14.1/Build 164, the driver problem was exposed.

The problem is corrected by making sure MSGDMA_DESC_CTL_TR_ERR_IRQ is not
set for any of the transmit DMA descriptors, and only used for receive
descriptors.

Fixes: 71cd26e altera tse: Error-Bit on tx-avalon-stream always set.

Signed-off-by: Chee Nouk Phoon <cnphoon@...era.com>
Signed-off-by: Vince Bridgers <vbridger@...nsource.altera.com>a
Cc: Andreas Oetken <ennoerlangen@...il.com>
---
 drivers/net/ethernet/altera/altera_msgdmahw.h | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/altera/altera_msgdmahw.h b/drivers/net/ethernet/altera/altera_msgdmahw.h
index eba070f..89cd11d 100644
--- a/drivers/net/ethernet/altera/altera_msgdmahw.h
+++ b/drivers/net/ethernet/altera/altera_msgdmahw.h
@@ -58,15 +58,12 @@ struct msgdma_extended_desc {
 /* Tx buffer control flags
  */
 #define MSGDMA_DESC_CTL_TX_FIRST	(MSGDMA_DESC_CTL_GEN_SOP |	\
-					 MSGDMA_DESC_CTL_TR_ERR_IRQ |	\
 					 MSGDMA_DESC_CTL_GO)
 
-#define MSGDMA_DESC_CTL_TX_MIDDLE	(MSGDMA_DESC_CTL_TR_ERR_IRQ |	\
-					 MSGDMA_DESC_CTL_GO)
+#define MSGDMA_DESC_CTL_TX_MIDDLE	(MSGDMA_DESC_CTL_GO)
 
 #define MSGDMA_DESC_CTL_TX_LAST		(MSGDMA_DESC_CTL_GEN_EOP |	\
 					 MSGDMA_DESC_CTL_TR_COMP_IRQ |	\
-					 MSGDMA_DESC_CTL_TR_ERR_IRQ |	\
 					 MSGDMA_DESC_CTL_GO)
 
 #define MSGDMA_DESC_CTL_TX_SINGLE	(MSGDMA_DESC_CTL_GEN_SOP |	\
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html