[PATCH] ath11k: fix up some error paths

[PATCH] ath11k: fix up some error paths

[Dan Carpenter]

There are two error paths where "ret" wasn't set.  Ideally the compiler
would have warned about these bugs, but we initialized "ret" to zero so
it silenced the warning.  I have removed that.  Also if
ath11k_hal_srng_get_entrysize() fails then we need to free some
resources before returning.

Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/net/wireless/ath/ath11k/dp_tx.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/dp_tx.c b/drivers/net/wireless/ath/ath11k/dp_tx.c
index a8b9557c2346..ea7564245c58 100644
--- a/drivers/net/wireless/ath/ath11k/dp_tx.c
+++ b/drivers/net/wireless/ath/ath11k/dp_tx.c
@@ -606,7 +606,7 @@ int ath11k_dp_tx_htt_srng_setup(struct ath11k_base *ab, u32 ring_id,
 	dma_addr_t hp_addr, tp_addr;
 	enum htt_srng_ring_type htt_ring_type;
 	enum htt_srng_ring_id htt_ring_id;
-	int ret = 0;
+	int ret;
 
 	skb = ath11k_htc_alloc_skb(ab, len);
 	if (!skb)
@@ -618,9 +618,10 @@ int ath11k_dp_tx_htt_srng_setup(struct ath11k_base *ab, u32 ring_id,
 	hp_addr = ath11k_hal_srng_get_hp_addr(ab, srng);
 	tp_addr = ath11k_hal_srng_get_tp_addr(ab, srng);
 
-	if (ath11k_dp_tx_get_ring_id_type(ab, mac_id, ring_id,
-					  ring_type, &htt_ring_type,
-					  &htt_ring_id))
+	ret = ath11k_dp_tx_get_ring_id_type(ab, mac_id, ring_id,
+					    ring_type, &htt_ring_type,
+					    &htt_ring_id);
+	if (ret)
 		goto err_free;
 
 	skb_put(skb, len);
@@ -646,7 +647,7 @@ int ath11k_dp_tx_htt_srng_setup(struct ath11k_base *ab, u32 ring_id,
 
 	ret = ath11k_hal_srng_get_entrysize(ring_type);
 	if (ret < 0)
-		return -EINVAL;
+		goto err_free;
 
 	ring_entry_sz = ret;
 
@@ -791,7 +792,7 @@ int ath11k_dp_tx_htt_rx_filter_setup(struct ath11k_base *ab, u32 ring_id,
 	int len = sizeof(*cmd);
 	enum htt_srng_ring_type htt_ring_type;
 	enum htt_srng_ring_id htt_ring_id;
-	int ret = 0;
+	int ret;
 
 	skb = ath11k_htc_alloc_skb(ab, len);
 	if (!skb)
@@ -800,9 +801,10 @@ int ath11k_dp_tx_htt_rx_filter_setup(struct ath11k_base *ab, u32 ring_id,
 	memset(&params, 0, sizeof(params));
 	ath11k_hal_srng_get_params(ab, srng, &params);
 
-	if (ath11k_dp_tx_get_ring_id_type(ab, mac_id, ring_id,
-					  ring_type, &htt_ring_type,
-					  &htt_ring_id))
+	ret = ath11k_dp_tx_get_ring_id_type(ab, mac_id, ring_id,
+					    ring_type, &htt_ring_type,
+					    &htt_ring_id);
+	if (ret)
 		goto err_free;
 
 	skb_put(skb, len);
-- 
2.11.0

Re: [PATCH] ath11k: fix up some error paths

[Kalle Valo]

Dan Carpenter <dan.carpenter@oracle.com> wrote:

> There are two error paths where "ret" wasn't set.  Ideally the compiler
> would have warned about these bugs, but we initialized "ret" to zero so
> it silenced the warning.  I have removed that.  Also if
> ath11k_hal_srng_get_entrysize() fails then we need to free some
> resources before returning.
> 
> Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

Failed to apply:

error: patch failed: drivers/net/wireless/ath/ath11k/dp_tx.c:646
error: drivers/net/wireless/ath/ath11k/dp_tx.c: patch does not apply
stg import: Diff does not apply cleanly

Patch set to Changes Requested.

-- 
https://patchwork.kernel.org/patch/11290443/

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

[PATCH v2] ath11k: fix up some error paths

[Dan Carpenter]

There are two error paths where "ret" wasn't set.  Also one error path
we set the error code to -EINVAL but we should just preserve the error
code from ath11k_hal_srng_get_entrysize().  That function only returns
-EINVAL so this doesn't change anything.

I removed the "ret = 0;" initializers so that hopefully GCC will be able
to detect these sorts of bugs in the future.

Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
v2: rebase

 drivers/net/wireless/ath/ath11k/dp_tx.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/dp_tx.c b/drivers/net/wireless/ath/ath11k/dp_tx.c
index 918305dda106..873b2cb2bb4c 100644
--- a/drivers/net/wireless/ath/ath11k/dp_tx.c
+++ b/drivers/net/wireless/ath/ath11k/dp_tx.c
@@ -630,7 +630,7 @@ int ath11k_dp_tx_htt_srng_setup(struct ath11k_base *ab, u32 ring_id,
 	dma_addr_t hp_addr, tp_addr;
 	enum htt_srng_ring_type htt_ring_type;
 	enum htt_srng_ring_id htt_ring_id;
-	int ret = 0;
+	int ret;
 
 	skb = ath11k_htc_alloc_skb(ab, len);
 	if (!skb)
@@ -642,9 +642,10 @@ int ath11k_dp_tx_htt_srng_setup(struct ath11k_base *ab, u32 ring_id,
 	hp_addr = ath11k_hal_srng_get_hp_addr(ab, srng);
 	tp_addr = ath11k_hal_srng_get_tp_addr(ab, srng);
 
-	if (ath11k_dp_tx_get_ring_id_type(ab, mac_id, ring_id,
-					  ring_type, &htt_ring_type,
-					  &htt_ring_id))
+	ret = ath11k_dp_tx_get_ring_id_type(ab, mac_id, ring_id,
+					    ring_type, &htt_ring_type,
+					    &htt_ring_id);
+	if (ret)
 		goto err_free;
 
 	skb_put(skb, len);
@@ -669,10 +670,8 @@ int ath11k_dp_tx_htt_srng_setup(struct ath11k_base *ab, u32 ring_id,
 				 HAL_ADDR_MSB_REG_SHIFT;
 
 	ret = ath11k_hal_srng_get_entrysize(ring_type);
-	if (ret < 0) {
-		ret = -EINVAL;
+	if (ret < 0)
 		goto err_free;
-	}
 
 	ring_entry_sz = ret;
 
@@ -817,7 +816,7 @@ int ath11k_dp_tx_htt_rx_filter_setup(struct ath11k_base *ab, u32 ring_id,
 	int len = sizeof(*cmd);
 	enum htt_srng_ring_type htt_ring_type;
 	enum htt_srng_ring_id htt_ring_id;
-	int ret = 0;
+	int ret;
 
 	skb = ath11k_htc_alloc_skb(ab, len);
 	if (!skb)
@@ -826,9 +825,10 @@ int ath11k_dp_tx_htt_rx_filter_setup(struct ath11k_base *ab, u32 ring_id,
 	memset(&params, 0, sizeof(params));
 	ath11k_hal_srng_get_params(ab, srng, &params);
 
-	if (ath11k_dp_tx_get_ring_id_type(ab, mac_id, ring_id,
-					  ring_type, &htt_ring_type,
-					  &htt_ring_id))
+	ret = ath11k_dp_tx_get_ring_id_type(ab, mac_id, ring_id,
+					    ring_type, &htt_ring_type,
+					    &htt_ring_id);
+	if (ret)
 		goto err_free;
 
 	skb_put(skb, len);
-- 
2.11.0

Re: [PATCH v2] ath11k: fix up some error paths

[Kalle Valo]

Dan Carpenter <dan.carpenter@oracle.com> wrote:

> There are two error paths where "ret" wasn't set.  Also one error path
> we set the error code to -EINVAL but we should just preserve the error
> code from ath11k_hal_srng_get_entrysize().  That function only returns
> -EINVAL so this doesn't change anything.
> 
> I removed the "ret = 0;" initializers so that hopefully GCC will be able
> to detect these sorts of bugs in the future.
> 
> Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

Patch applied to ath-next branch of ath.git, thanks.

7195c8747e87 ath11k: fix up some error paths

-- 
https://patchwork.kernel.org/patch/11335489/

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