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wifi: ath12k: fix soft lockup on suspend

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[ Upstream commit a47f3320bb ]

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: d889913205 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Johan Hovold 2024-07-09 09:31:32 +02:00 committed by Greg Kroah-Hartman
parent 7091b094dd
commit 6a78a29038
1 changed files with 2 additions and 1 deletions
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3
drivers/net/wireless/ath/ath12k/pci.c
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@ -434,7 +434,8 @@ 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];