ath10k: don't enable interrupts for the diagnostic window

The diagnostic window (CE7) uses polling and is not initiliased to retrieve
interrupts so disable interrupts altogether for CE7. Otherwise ath10k crashes
when using the diagnostic window while the firmware is running due to NULL
dereference and polling reads timeout.

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath10k/ce.c b/drivers/net/wireless/ath/ath10k/ce.c
index 101cadb6e4ba8c3659200093f5da739c4a501236..09ef03e7af893fb76142b48876578508895eb71c 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/ce.c
+++ b/drivers/net/wireless/ath/ath10k/ce.c
@@ -817,7 +817,10 @@ void ath10k_ce_enable_interrupts(struct ath10k *ar)
        struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
        int ce_id;
 
-       for (ce_id = 0; ce_id < CE_COUNT; ce_id++)
+       /* Skip the last copy engine, CE7 the diagnostic window, as that
+        * uses polling and isn't initialized for interrupts.
+        */
+       for (ce_id = 0; ce_id < CE_COUNT - 1; ce_id++)
                ath10k_ce_per_engine_handler_adjust(&ar_pci->ce_states[ce_id]);
 }