diff mbox series

rtlwifi: rtl8723be: Disable ASPM if RTL8723BE connects to some Intel PCI bridge

Message ID 20231110103227.58008-2-jhp@endlessos.org
State New
Headers
Series rtlwifi: rtl8723be: Disable ASPM if RTL8723BE connects to some Intel PCI bridge |

Commit Message

Jian-Hong Pan Nov. 10, 2023, 10:32 a.m. UTC 
  Disable rtl8723be's ASPM if the Realtek RTL8723BE PCIe Wireless adapter
connects to some Intel PCI bridges, such as Skylake and Kabylake.
Otherwise, the PCI AER flood hangs system:

pcieport 0000:00:1c.5: PCIe Bus Error: severity=Corrected, type=Physical Layer, (Receiver ID)
pcieport 0000:00:1c.5:   device [8086:9d15] error status/mask=00000001/00002000
pcieport 0000:00:1c.5:    [ 0] RxErr                  (First)
pcieport 0000:00:1c.5: AER: Corrected error received: 0000:00:1c.5
pcieport 0000:00:1c.5: AER: can't find device of ID00e5
pcieport 0000:00:1c.5: AER: Corrected error received: 0000:00:1c.5
pcieport 0000:00:1c.5: AER: can't find device of ID00e5
pcieport 0000:00:1c.5: AER: Multiple Corrected error received: 0000:00:1c.5
pcieport 0000:00:1c.5: AER: can't find device of ID00e5

Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=218127
Signed-off-by: Jian-Hong Pan <jhp@endlessos.org>
---
 .../wireless/realtek/rtlwifi/rtl8723be/sw.c   | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

Comments

Larry Finger Nov. 10, 2023, 8:04 p.m. UTC | #1 
On 11/10/23 04:32, Jian-Hong Pan wrote:
> Disable rtl8723be's ASPM if the Realtek RTL8723BE PCIe Wireless adapter
> connects to some Intel PCI bridges, such as Skylake and Kabylake.
> Otherwise, the PCI AER flood hangs system:
> 
> pcieport 0000:00:1c.5: PCIe Bus Error: severity=Corrected, type=Physical Layer, (Receiver ID)
> pcieport 0000:00:1c.5:   device [8086:9d15] error status/mask=00000001/00002000
> pcieport 0000:00:1c.5:    [ 0] RxErr                  (First)
> pcieport 0000:00:1c.5: AER: Corrected error received: 0000:00:1c.5
> pcieport 0000:00:1c.5: AER: can't find device of ID00e5
> pcieport 0000:00:1c.5: AER: Corrected error received: 0000:00:1c.5
> pcieport 0000:00:1c.5: AER: can't find device of ID00e5
> pcieport 0000:00:1c.5: AER: Multiple Corrected error received: 0000:00:1c.5
> pcieport 0000:00:1c.5: AER: can't find device of ID00e5
> 
> Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=218127
> Signed-off-by: Jian-Hong Pan <jhp@endlessos.org>
> ---
>   .../wireless/realtek/rtlwifi/rtl8723be/sw.c   | 19 +++++++++++++++++++
>   1 file changed, 19 insertions(+)
> 
> diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c
> index 43b611d5288d..720c79e0781a 100644
> --- a/drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c
> +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c
> @@ -25,10 +25,29 @@ static void rtl8723be_init_aspm_vars(struct ieee80211_hw *hw)
>   {
>   	struct rtl_priv *rtlpriv = rtl_priv(hw);
>   	struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
> +	struct pci_dev *bridge_pdev;
>   
>   	/*close ASPM for AMD defaultly */
>   	rtlpci->const_amdpci_aspm = 0;
>   
> +	/* Disable ASPM if RTL8723BE connects to some Intel PCI bridges, such as
> +	 * Skylake and Kabylake. Otherwise, the PCI AER flood hangs system.
> +	 */
> +	bridge_pdev = rtlpci->pdev->bus->self;
> +	if (bridge_pdev->vendor == PCI_VENDOR_ID_INTEL) {
> +		switch(bridge_pdev->device) {
> +		case 0x9d15:
> +		/* PCI bridges on Skylake */
> +		case 0xa110 ... 0xa11f:
> +		case 0xa167 ... 0xa16a:
> +		/* PCI bridges on Kabylake */
> +		case 0xa290 ... 0xa29f:
> +		case 0xa2e7 ... 0xa2ee:
> +			rtlpriv->cfg->mod_params->aspm_support = 0;
> +			break;
> +		}
> +	}
> +
>   	/* ASPM PS mode.
>   	 * 0 - Disable ASPM,
>   	 * 1 - Enable ASPM without Clock Req,

Does the switch statement need a default case in the event that Intel offers a 
compatible AP?

Larry
diff mbox series

Patch

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c
index 43b611d5288d..720c79e0781a 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8723be/sw.c
@@ -25,10 +25,29 @@  static void rtl8723be_init_aspm_vars(struct ieee80211_hw *hw)
 {
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
 	struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
+	struct pci_dev *bridge_pdev;
 
 	/*close ASPM for AMD defaultly */
 	rtlpci->const_amdpci_aspm = 0;
 
+	/* Disable ASPM if RTL8723BE connects to some Intel PCI bridges, such as
+	 * Skylake and Kabylake. Otherwise, the PCI AER flood hangs system.
+	 */
+	bridge_pdev = rtlpci->pdev->bus->self;
+	if (bridge_pdev->vendor == PCI_VENDOR_ID_INTEL) {
+		switch(bridge_pdev->device) {
+		case 0x9d15:
+		/* PCI bridges on Skylake */
+		case 0xa110 ... 0xa11f:
+		case 0xa167 ... 0xa16a:
+		/* PCI bridges on Kabylake */
+		case 0xa290 ... 0xa29f:
+		case 0xa2e7 ... 0xa2ee:
+			rtlpriv->cfg->mod_params->aspm_support = 0;
+			break;
+		}
+	}
+
 	/* ASPM PS mode.
 	 * 0 - Disable ASPM,
 	 * 1 - Enable ASPM without Clock Req,