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wifi: ath12k: fix context switch in panic notifier issue #915

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wifi: ath12k: fix context switch in panic notifier issue #915

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2 changes: 2 additions & 0 deletions drivers/net/wireless/ath/ath12k/core.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1770,6 +1770,8 @@ static int ath12k_core_panic_handler(struct notifier_block *nb,
struct ath12k_base *ab = container_of(nb, struct ath12k_base,
panic_nb);

set_bit(ATH12K_FLAG_PANIC_PROCESSING, &ab->dev_flags);

return ath12k_hif_panic_handler(ab);
}

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1 change: 1 addition & 0 deletions drivers/net/wireless/ath/ath12k/core.h
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Expand Up @@ -279,6 +279,7 @@ enum ath12k_dev_flags {
ATH12K_FLAG_QMI_FW_READY_COMPLETE,
ATH12K_FLAG_FTM_SEGMENTED,
ATH12K_FLAG_FIXED_MEM_REGION,
ATH12K_FLAG_PANIC_PROCESSING,
};

struct ath12k_tx_conf {
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6 changes: 4 additions & 2 deletions drivers/net/wireless/ath/ath12k/pci.c
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Expand Up @@ -1157,7 +1157,8 @@ u32 ath12k_pci_read32(struct ath12k_base *ab, u32 offset)
* need to wakeup MHI to access.
*/
if (test_bit(ATH12K_PCI_FLAG_INIT_DONE, &ab_pci->flags) &&
offset >= ACCESS_ALWAYS_OFF && ab_pci->pci_ops->wakeup)
offset >= ACCESS_ALWAYS_OFF && ab_pci->pci_ops->wakeup &&
!test_bit(ATH12K_FLAG_PANIC_PROCESSING, &ab->dev_flags))
ret = ab_pci->pci_ops->wakeup(ab);

if (offset < WINDOW_START) {
Expand Down Expand Up @@ -1205,7 +1206,8 @@ void ath12k_pci_write32(struct ath12k_base *ab, u32 offset, u32 value)
* need to wakeup MHI to access.
*/
if (test_bit(ATH12K_PCI_FLAG_INIT_DONE, &ab_pci->flags) &&
offset >= ACCESS_ALWAYS_OFF && ab_pci->pci_ops->wakeup)
offset >= ACCESS_ALWAYS_OFF && ab_pci->pci_ops->wakeup &&
!test_bit(ATH12K_FLAG_PANIC_PROCESSING, &ab->dev_flags))
ret = ab_pci->pci_ops->wakeup(ab);

if (offset < WINDOW_START) {
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