diff mbox series

[net-next,6/9] net: pcs: xpcs: correct lp_advertising contents

Message ID E1q1P3t-007E8z-Qn@rmk-PC.armlinux.org.uk (mailing list archive)
State Accepted
Commit 1f94ba198bda5738bd26cb7633dca4b33a43dff2
Delegated to: Netdev Maintainers
Headers show
Series net: pcs: xpcs: cleanups for clause 73 support | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
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: 8 this patch: 8
netdev/cc_maintainers success CCed 9 of 9 maintainers
netdev/build_clang success Errors and warnings before: 8 this patch: 8
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: 8 this patch: 8
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 23 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Russell King (Oracle) May 23, 2023, 10:16 a.m. UTC 
lp_advertising is supposed to reflect the link partner's advertisement
unmodified by the local advertisement, but xpcs bitwise ands it with
the local advertisement prior to calculating the resolution of the
negotiation.

Fix this by moving the bitwise and to xpcs_resolve_lpa_c73() so it can
place the results in a temporary bitmap before passing that to
ixpcs_get_max_usxgmii_speed().

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
---
 drivers/net/pcs/pcs-xpcs.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/pcs/pcs-xpcs.c b/drivers/net/pcs/pcs-xpcs.c
index 2165859a063c..90920a7ba136 100644
--- a/drivers/net/pcs/pcs-xpcs.c
+++ b/drivers/net/pcs/pcs-xpcs.c
@@ -531,18 +531,19 @@  static int xpcs_read_lpa_c73(struct dw_xpcs *xpcs,
 
 	mii_c73_mod_linkmode(state->lp_advertising, lpa);
 
-	linkmode_and(state->lp_advertising, state->lp_advertising,
-		     state->advertising);
 	return 0;
 }
 
 static void xpcs_resolve_lpa_c73(struct dw_xpcs *xpcs,
 				 struct phylink_link_state *state)
 {
-	int max_speed = xpcs_get_max_usxgmii_speed(state->lp_advertising);
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(res);
+
+	/* Calculate the union of the advertising masks */
+	linkmode_and(res, state->lp_advertising, state->advertising);
 
 	state->pause = MLO_PAUSE_TX | MLO_PAUSE_RX;
-	state->speed = max_speed;
+	state->speed = xpcs_get_max_usxgmii_speed(res);
 	state->duplex = DUPLEX_FULL;
 }