diff mbox series

[net-next,v6,6/6] net: dsa: microchip: fix tag_ksz egress mask for KSZ8795 family

Message ID 20240813142750.772781-7-vtpieter@gmail.com (mailing list archive)
State Accepted
Commit 6f2b72c04d58a40c16f3cd858776517f16226119
Delegated to: Netdev Maintainers
Headers show
Series net: dsa: microchip: ksz8795: add Wake on LAN support | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 29 this patch: 29
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 9 of 9 maintainers
netdev/build_clang success Errors and warnings before: 29 this patch: 29
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 29 this patch: 29
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 20 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-08-15--18-00 (tests: 706)

Commit Message

Pieter Aug. 13, 2024, 2:27 p.m. UTC 
From: Pieter Van Trappen <pieter.van.trappen@cern.ch>

Fix the tag_ksz egress mask for DSA_TAG_PROTO_KSZ8795, the port is
encoded in the two and not three LSB. This fix is for completeness,
for example the bug doesn't manifest itself on the KSZ8794 because bit
2 seems to be always zero.

Signed-off-by: Pieter Van Trappen <pieter.van.trappen@cern.ch>
---
 net/dsa/tag_ksz.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Comments

Arun Ramadoss Aug. 13, 2024, 3:29 p.m. UTC | #1 
On Tue, 2024-08-13 at 16:27 +0200, vtpieter@gmail.com wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you
> know the content is safe
> 
> From: Pieter Van Trappen <pieter.van.trappen@cern.ch>
> 
> Fix the tag_ksz egress mask for DSA_TAG_PROTO_KSZ8795, the port is
> encoded in the two and not three LSB. This fix is for completeness,
> for example the bug doesn't manifest itself on the KSZ8794 because
> bit
> 2 seems to be always zero.
> 
> Signed-off-by: Pieter Van Trappen <pieter.van.trappen@cern.ch>

Acked-by: Arun Ramadoss <arun.ramadoss@microchip.com>
diff mbox series

Patch

diff --git a/net/dsa/tag_ksz.c b/net/dsa/tag_ksz.c
index ee7b272ab715..1f46de394f2e 100644
--- a/net/dsa/tag_ksz.c
+++ b/net/dsa/tag_ksz.c
@@ -111,9 +111,10 @@  static struct sk_buff *ksz_common_rcv(struct sk_buff *skb,
  * DA(6bytes)|SA(6bytes)|....|Data(nbytes)|tag0(1byte)|FCS(4bytes)
  * ---------------------------------------------------------------------------
  * tag0 : zero-based value represents port
- *	  (eg, 0x00=port1, 0x02=port3, 0x06=port7)
+ *	  (eg, 0x0=port1, 0x2=port3, 0x3=port4)
  */
 
+#define KSZ8795_TAIL_TAG_EG_PORT_M	GENMASK(1, 0)
 #define KSZ8795_TAIL_TAG_OVERRIDE	BIT(6)
 #define KSZ8795_TAIL_TAG_LOOKUP		BIT(7)
 
@@ -141,7 +142,8 @@  static struct sk_buff *ksz8795_rcv(struct sk_buff *skb, struct net_device *dev)
 {
 	u8 *tag = skb_tail_pointer(skb) - KSZ_EGRESS_TAG_LEN;
 
-	return ksz_common_rcv(skb, dev, tag[0] & 7, KSZ_EGRESS_TAG_LEN);
+	return ksz_common_rcv(skb, dev, tag[0] & KSZ8795_TAIL_TAG_EG_PORT_M,
+			      KSZ_EGRESS_TAG_LEN);
 }
 
 static const struct dsa_device_ops ksz8795_netdev_ops = {