| Message ID | 20220824063312.15784-1-pkshih@realtek.com |
|---|---|
| State | New |
| Headers | show |
| Series | [1/2] wifi: rtw89: pci: fix interrupt stuck after leaving low power mode | expand |
Ping-Ke Shih <pkshih@realtek.com> writes: > We turn off interrupt in ISR, and re-enable interrupt in threadfn or > napi_poll according to the mode it stays. If we are turning off interrupt, > rtwpci->running flag is unset and interrupt handler stop processing even > if it was called, so disallow to re-enable interrupt in this situation. > Or, wifi chip doesn't trigger interrupt events anymore because interrupt > status (ISR) isn't clear by interrupt handler anymore. > > Fixes: c83dcd0508e2 ("rtw89: pci: add a separate interrupt handler for low power mode") > Signed-off-by: Ping-Ke Shih <pkshih@realtek.com> > --- > Hi Kalle, > > This patchset contains two patches with fixes tag, but we don't turn on > lower power mode yet, so this patchset should go to wireless-next tree. Very good, thanks for letting me know. This kind of info always helps.
Ping-Ke Shih <pkshih@realtek.com> wrote: > We turn off interrupt in ISR, and re-enable interrupt in threadfn or > napi_poll according to the mode it stays. If we are turning off interrupt, > rtwpci->running flag is unset and interrupt handler stop processing even > if it was called, so disallow to re-enable interrupt in this situation. > Or, wifi chip doesn't trigger interrupt events anymore because interrupt > status (ISR) isn't clear by interrupt handler anymore. > > Fixes: c83dcd0508e2 ("rtw89: pci: add a separate interrupt handler for low power mode") > Signed-off-by: Ping-Ke Shih <pkshih@realtek.com> 2 patches applied to wireless-next.git, thanks. b7e715d3dcd2 wifi: rtw89: pci: fix interrupt stuck after leaving low power mode 4a29213cd775 wifi: rtw89: pci: correct TX resource checking in low power mode
diff --git a/drivers/net/wireless/realtek/rtw89/pci.c b/drivers/net/wireless/realtek/rtw89/pci.c index c68fec9eb5a64..8a093e1cb328e 100644 --- a/drivers/net/wireless/realtek/rtw89/pci.c +++ b/drivers/net/wireless/realtek/rtw89/pci.c @@ -760,7 +760,8 @@ static irqreturn_t rtw89_pci_interrupt_threadfn(int irq, void *dev) enable_intr: spin_lock_irqsave(&rtwpci->irq_lock, flags); - rtw89_chip_enable_intr(rtwdev, rtwpci); + if (likely(rtwpci->running)) + rtw89_chip_enable_intr(rtwdev, rtwpci); spin_unlock_irqrestore(&rtwpci->irq_lock, flags); return IRQ_HANDLED; }
We turn off interrupt in ISR, and re-enable interrupt in threadfn or napi_poll according to the mode it stays. If we are turning off interrupt, rtwpci->running flag is unset and interrupt handler stop processing even if it was called, so disallow to re-enable interrupt in this situation. Or, wifi chip doesn't trigger interrupt events anymore because interrupt status (ISR) isn't clear by interrupt handler anymore. Fixes: c83dcd0508e2 ("rtw89: pci: add a separate interrupt handler for low power mode") Signed-off-by: Ping-Ke Shih <pkshih@realtek.com> --- Hi Kalle, This patchset contains two patches with fixes tag, but we don't turn on lower power mode yet, so this patchset should go to wireless-next tree. Thank you. --- drivers/net/wireless/realtek/rtw89/pci.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)