[PATCH] rtw88: pci: turn off PCI ASPM during NAPI polling
From: Jian-Hong Pan
Date: Mon Dec 13 2021 - 03:11:42 EST
The system on the machines equipped with RTL8821CE freezes randomly
until the PCI ASPM is disabled during NAPI poll function.
Link: https://www.spinics.net/lists/linux-wireless/msg218387.html
Fixes: 9e2fd29864c5 ("rtw88: add napi support")
Signed-off-by: Jian-Hong Pan <jhp@xxxxxxxxxxxxx>
---
drivers/net/wireless/realtek/rtw88/pci.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/wireless/realtek/rtw88/pci.c b/drivers/net/wireless/realtek/rtw88/pci.c
index a7a6ebfaa203..a6fdddecd37d 100644
--- a/drivers/net/wireless/realtek/rtw88/pci.c
+++ b/drivers/net/wireless/realtek/rtw88/pci.c
@@ -1658,6 +1658,7 @@ static int rtw_pci_napi_poll(struct napi_struct *napi, int budget)
priv);
int work_done = 0;
+ rtw_pci_link_ps(rtwdev, false);
while (work_done < budget) {
u32 work_done_once;
@@ -1681,6 +1682,7 @@ static int rtw_pci_napi_poll(struct napi_struct *napi, int budget)
if (rtw_pci_get_hw_rx_ring_nr(rtwdev, rtwpci))
napi_schedule(napi);
}
+ rtw_pci_link_ps(rtwdev, true);
return work_done;
}
--
2.34.1