Some r8168 NICs stop working upon system resume:
[ 688.051096] r8169 0000:02:00.1 enp2s0f1: rtl_ep_ocp_read_cond == 0 (loop: 10, delay: 10000).
[ 688.175131] r8169 0000:02:00.1 enp2s0f1: Link is Down
...
[ 691.534611] r8169 0000:02:00.1 enp2s0f1: PCI error (cmd = 0x0407, status_errs = 0x0000)
Not sure if it's related, but those NICs have a BMC device at function
0:
02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Realtek RealManage BMC [10ec:816e] (rev 1a)
Trial and error shows that increase the loop wait on
rtl_ep_ocp_read_cond to 30 can eliminate the issue, so let
rtl8168ep_driver_start() to wait a bit longer.
Fixes: e6d6ca6e1204 ("r8169: Add support for another RTL8168FP")
Signed-off-by: Kai-Heng Feng <[email protected]>
---
v3:
- Wording
- Add Fixes tag
- Denote 'net' in subject
v2:
- Wording
drivers/net/ethernet/realtek/r8169_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index bb787a52bc75..81fd31f6fac4 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -1211,7 +1211,7 @@ static void rtl8168ep_driver_start(struct rtl8169_private *tp)
{
r8168ep_ocp_write(tp, 0x01, 0x180, OOB_CMD_DRIVER_START);
r8168ep_ocp_write(tp, 0x01, 0x30, r8168ep_ocp_read(tp, 0x30) | 0x01);
- rtl_loop_wait_high(tp, &rtl_ep_ocp_read_cond, 10000, 10);
+ rtl_loop_wait_high(tp, &rtl_ep_ocp_read_cond, 10000, 30);
}
static void rtl8168_driver_start(struct rtl8169_private *tp)
--
2.34.1
On 22.12.2023 05:34, Kai-Heng Feng wrote:
> Some r8168 NICs stop working upon system resume:
>
> [ 688.051096] r8169 0000:02:00.1 enp2s0f1: rtl_ep_ocp_read_cond == 0 (loop: 10, delay: 10000).
> [ 688.175131] r8169 0000:02:00.1 enp2s0f1: Link is Down
> ...
> [ 691.534611] r8169 0000:02:00.1 enp2s0f1: PCI error (cmd = 0x0407, status_errs = 0x0000)
>
> Not sure if it's related, but those NICs have a BMC device at function
> 0:
> 02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Realtek RealManage BMC [10ec:816e] (rev 1a)
>
> Trial and error shows that increase the loop wait on
> rtl_ep_ocp_read_cond to 30 can eliminate the issue, so let
> rtl8168ep_driver_start() to wait a bit longer.
>
> Fixes: e6d6ca6e1204 ("r8169: Add support for another RTL8168FP")
> Signed-off-by: Kai-Heng Feng <[email protected]>
> ---
> v3:
> - Wording
> - Add Fixes tag
> - Denote 'net' in subject
>
> v2:
> - Wording
>
> drivers/net/ethernet/realtek/r8169_main.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
> index bb787a52bc75..81fd31f6fac4 100644
> --- a/drivers/net/ethernet/realtek/r8169_main.c
> +++ b/drivers/net/ethernet/realtek/r8169_main.c
> @@ -1211,7 +1211,7 @@ static void rtl8168ep_driver_start(struct rtl8169_private *tp)
> {
> r8168ep_ocp_write(tp, 0x01, 0x180, OOB_CMD_DRIVER_START);
> r8168ep_ocp_write(tp, 0x01, 0x30, r8168ep_ocp_read(tp, 0x30) | 0x01);
> - rtl_loop_wait_high(tp, &rtl_ep_ocp_read_cond, 10000, 10);
> + rtl_loop_wait_high(tp, &rtl_ep_ocp_read_cond, 10000, 30);
> }
>
> static void rtl8168_driver_start(struct rtl8169_private *tp)
Reviewed-by: Heiner Kallweit <[email protected]>
Hello:
This patch was applied to netdev/net.git (main)
by David S. Miller <[email protected]>:
On Fri, 22 Dec 2023 12:34:09 +0800 you wrote:
> Some r8168 NICs stop working upon system resume:
>
> [ 688.051096] r8169 0000:02:00.1 enp2s0f1: rtl_ep_ocp_read_cond == 0 (loop: 10, delay: 10000).
> [ 688.175131] r8169 0000:02:00.1 enp2s0f1: Link is Down
> ...
> [ 691.534611] r8169 0000:02:00.1 enp2s0f1: PCI error (cmd = 0x0407, status_errs = 0x0000)
>
> [...]
Here is the summary with links:
- [net,v3] r8169: Fix PCI error on system resume
https://git.kernel.org/netdev/net/c/9c476269bff2
You are awesome, thank you!
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