From: Ping-Ke Shih Date: Wed, 24 Aug 2022 06:33:11 +0000 (+0800) Subject: wifi: rtw89: pci: fix interrupt stuck after leaving low power mode X-Git-Tag: v6.0.3~592 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=1f15f9a0b6e2777baa5c5f4548655f442cb0b4a2;p=thirdparty%2Fkernel%2Fstable.git wifi: rtw89: pci: fix interrupt stuck after leaving low power mode [ Upstream commit b7e715d3dcd2e9fa3a689ba0dd7ab85f8aaf6e9a ] 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 Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20220824063312.15784-1-pkshih@realtek.com Signed-off-by: Sasha Levin --- 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; }