[PATCH 4.9 055/171] ath10k: fix NAPI enable/disable symmetry for AHB interface

Greg Kroah-Hartman
2018-11-08T22:04:19Z

[ Upstream commit a7595a820b07db9ac0d8f479ff62002bdd32a05a ]

Move NAPI enable to 'ath10k_ahb_hif_start' from
'ath10k_ahb_hif_power_up'. This is to maintain the symmetry
of calling napi_enable() from ath10k_ahb_hif_start() so that it
matches with napi_disable() being called from ath10k_pci_hif_stop().

This change is based on the crash fix from Kalle for PCI interface in
commit 1427228d5869 ("ath10k: fix napi crash during rmmod when probe
firmware fails").

Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/ath/ath10k/ahb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath10k/ahb.c b/drivers/net/wireless/ath/ath10k/ahb.c
index 45226dbee5ce..da770af83036 100644
--- a/drivers/net/wireless/ath/ath10k/ahb.c
+++ b/drivers/net/wireless/ath/ath10k/ahb.c
@@ -640,6 +640,7 @@ static int ath10k_ahb_hif_start(struct ath10k *ar)
{
ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot ahb hif start\n");

+ napi_enable(&ar->napi);
ath10k_ce_enable_interrupts(ar);
ath10k_pci_enable_legacy_irq(ar);

@@ -692,7 +693,6 @@ static int ath10k_ahb_hif_power_up(struct ath10k *ar)
ath10k_err(ar, "could not wake up target CPU: %d\n", ret);
goto err_ce_deinit;
}
- napi_enable(&ar->napi);

return 0;

--
2.17.1