The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x a47f3320bb4ba6714abe8dddb36399367b491358 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024080749-nuzzle-pretended-b1a0@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:

a47f3320bb4b ("wifi: ath12k: fix soft lockup on suspend") 604308a34487 ("wifi: ath12k: add CE and ext IRQ flag to indicate irq_handler")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From a47f3320bb4ba6714abe8dddb36399367b491358 Mon Sep 17 00:00:00 2001 From: Johan Hovold johan+linaro@kernel.org Date: Tue, 9 Jul 2024 09:31:32 +0200 Subject: [PATCH] wifi: ath12k: fix soft lockup on suspend

The ext interrupts are enabled when the firmware has been started, but this may never happen, for example, if the board configuration file is missing.

When the system is later suspended, the driver unconditionally tries to disable interrupts, which results in an irq disable imbalance and causes the driver to spin indefinitely in napi_synchronize().

Make sure that the interrupts have been enabled before attempting to disable them.

Fixes: d889913205cf ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices") Cc: stable@vger.kernel.org # 6.3 Signed-off-by: Johan Hovold johan+linaro@kernel.org Acked-by: Jeff Johnson quic_jjohnson@quicinc.com Link: https://patch.msgid.link/20240709073132.9168-1-johan+linaro@kernel.org Signed-off-by: Johannes Berg johannes.berg@intel.com

diff --git a/drivers/net/wireless/ath/ath12k/pci.c b/drivers/net/wireless/ath/ath12k/pci.c index 876c029f58f6..9e0b9e329bda 100644 --- a/drivers/net/wireless/ath/ath12k/pci.c +++ b/drivers/net/wireless/ath/ath12k/pci.c @@ -473,7 +473,8 @@ static void __ath12k_pci_ext_irq_disable(struct ath12k_base *ab) { int i;

- clear_bit(ATH12K_FLAG_EXT_IRQ_ENABLED, &ab->dev_flags); + if (!test_and_clear_bit(ATH12K_FLAG_EXT_IRQ_ENABLED, &ab->dev_flags)) + return;

for (i = 0; i < ATH12K_EXT_IRQ_GRP_NUM_MAX; i++) { struct ath12k_ext_irq_grp *irq_grp = &ab->ext_irq_grp[i];