netdev - [PATCH net-next 4/6] r8169: prepare rtl_hw_aspm_clkreq

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

Date:   Mon, 6 Mar 2023 22:25:49 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Paolo Abeni <pabeni@...hat.com>, Jakub Kicinski <kuba@...nel.org>,
        David Miller <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Realtek linux nic maintainers <nic_swsd@...ltek.com>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Simon Horman <simon.horman@...igine.com>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Holger Hoffstätte <holger@...lied-asynchrony.com>
Subject: [PATCH net-next 4/6] r8169: prepare rtl_hw_aspm_clkreq_enable for
 usage in atomic context

Bail out if the function is used with chip versions that don't support
ASPM configuration. In addition remove the delay, it tuned out that
it's not needed, also vendor driver r8125 doesn't have it.

Suggested-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
Reviewed-by: Simon Horman <simon.horman@...igine.com>
Tested-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
Tested-by: Holger Hoffstätte <holger@...lied-asynchrony.com>
Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 drivers/net/ethernet/realtek/r8169_main.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 61cbf498f..96af31aea 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -2741,6 +2741,9 @@ static void rtl_disable_exit_l1(struct rtl8169_private *tp)
 
 static void rtl_hw_aspm_clkreq_enable(struct rtl8169_private *tp, bool enable)
 {
+	if (tp->mac_version < RTL_GIGA_MAC_VER_32)
+		return;
+
 	/* Don't enable ASPM in the chip if OS can't control ASPM */
 	if (enable && tp->aspm_manageable) {
 		rtl_mod_config5(tp, 0, ASPM_en);
@@ -2770,8 +2773,6 @@ static void rtl_hw_aspm_clkreq_enable(struct rtl8169_private *tp, bool enable)
 		rtl_mod_config2(tp, ClkReqEn, 0);
 		rtl_mod_config5(tp, ASPM_en, 0);
 	}
-
-	udelay(10);
 }
 
 static void rtl_set_fifo_size(struct rtl8169_private *tp, u16 rx_stat,
-- 
2.39.2