[PATCH] ath11k: Fix target crash due to WBM_IDLE_LINK ring desc shortage

[PATCH] ath11k: Fix target crash due to WBM_IDLE_LINK ring desc shortage

[Vasanthakumar Thiagarajan]

Make sure the number of WBM_IDLE_LINK ring descriptors is power
of 2. This increases the number of descriptors to 32k from the
current ~18k to fix the target assert because of the shortage in
the descriptors in WBM_IDLE_LINK ring. Remove unnecessary
power of 2 calculation in ath11k_dp_link_desc_setup() as it is
not required after this change.

Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
---
 drivers/net/wireless/ath/ath11k/dp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/dp.c b/drivers/net/wireless/ath/ath11k/dp.c
index ff510e8..72c21cf 100644
--- a/drivers/net/wireless/ath/ath11k/dp.c
+++ b/drivers/net/wireless/ath/ath11k/dp.c
@@ -478,6 +478,9 @@ static int ath11k_wbm_idle_ring_setup(struct ath11k_base *ab, u32 *n_link_desc)
 	*n_link_desc = n_mpdu_link_desc + n_mpdu_queue_desc +
 		      n_tx_msdu_link_desc + n_rx_msdu_link_desc;
 
+	if (*n_link_desc & (*n_link_desc - 1))
+		*n_link_desc = 1 << fls(*n_link_desc);
+
 	ret = ath11k_dp_srng_setup(ab, &dp->wbm_idle_ring,
 				   HAL_WBM_IDLE_LINK, 0, 0, *n_link_desc);
 	if (ret) {
@@ -499,9 +502,6 @@ int ath11k_dp_link_desc_setup(struct ath11k_base *ab,
 	u32 *desc;
 	int i, ret;
 
-	if (n_link_desc & (n_link_desc - 1))
-		n_link_desc = 1 << fls(n_link_desc);
-
 	tot_mem_sz = n_link_desc * HAL_LINK_DESC_SIZE;
 	tot_mem_sz += HAL_LINK_DESC_ALIGN;
 
-- 
2.7.4


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Re: [PATCH] ath11k: Fix target crash due to WBM_IDLE_LINK ring desc shortage

[Kalle Valo]

Vasanthakumar Thiagarajan <vthiagar@codeaurora.org> wrote:

> Make sure the number of WBM_IDLE_LINK ring descriptors is power
> of 2. This increases the number of descriptors to 32k from the
> current ~18k to fix the target assert because of the shortage in
> the descriptors in WBM_IDLE_LINK ring. Remove unnecessary
> power of 2 calculation in ath11k_dp_link_desc_setup() as it is
> not required after this change.
> 
> Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

Patch applied to ath11k-post-bringup branch of ath.git, thanks.

1415d842e71a ath11k: Fix target crash due to WBM_IDLE_LINK ring desc shortage

-- 
https://patchwork.kernel.org/patch/11216961/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches


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