diff mbox

ath9k_htc: check seq number instead of cmd id for timeout

Message ID 1426235558-13787-1-git-send-email-fred.chou.nd@gmail.com (mailing list archive)
State Accepted
Delegated to: Kalle Valo
Headers show

Commit Message

fred.chou.nd@gmail.com March 13, 2015, 8:32 a.m. UTC 
From: Fred Chou <fred.chou.nd@gmail.com>

As the driver may send multiple wmi commands with identical cmd id,
it is more robust to check seq number for timeout instead.

Signed-off-by: Fred Chou <fred.chou.nd@gmail.com>
---
 drivers/net/wireless/ath/ath9k/wmi.c | 12 ++++++------
 drivers/net/wireless/ath/ath9k/wmi.h |  2 +-
 2 files changed, 7 insertions(+), 7 deletions(-)

Comments

Oleksij Rempel March 15, 2015, 6:48 a.m. UTC | #1 
Hi,

thank you for your patch. Looks good for me. Did you tested it?

Am 13.03.2015 um 09:32 schrieb Fred Chou:
> From: Fred Chou <fred.chou.nd@gmail.com>
> 
> As the driver may send multiple wmi commands with identical cmd id,
> it is more robust to check seq number for timeout instead.
> 
> Signed-off-by: Fred Chou <fred.chou.nd@gmail.com>
> ---
>  drivers/net/wireless/ath/ath9k/wmi.c | 12 ++++++------
>  drivers/net/wireless/ath/ath9k/wmi.h |  2 +-
>  2 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/net/wireless/ath/ath9k/wmi.c b/drivers/net/wireless/ath/ath9k/wmi.c
> index 65c8894..aba909f 100644
> --- a/drivers/net/wireless/ath/ath9k/wmi.c
> +++ b/drivers/net/wireless/ath/ath9k/wmi.c
> @@ -224,7 +224,7 @@ static void ath9k_wmi_ctrl_rx(void *priv, struct sk_buff *skb,
>  
>  	/* Check if there has been a timeout. */
>  	spin_lock(&wmi->wmi_lock);
> -	if (cmd_id != wmi->last_cmd_id) {
> +	if (be16_to_cpu(hdr->seq_no) != wmi->last_seq_id) {
>  		spin_unlock(&wmi->wmi_lock);
>  		goto free_skb;
>  	}
> @@ -272,11 +272,16 @@ static int ath9k_wmi_cmd_issue(struct wmi *wmi,
>  			       enum wmi_cmd_id cmd, u16 len)
>  {
>  	struct wmi_cmd_hdr *hdr;
> +	unsigned long flags;
>  
>  	hdr = (struct wmi_cmd_hdr *) skb_push(skb, sizeof(struct wmi_cmd_hdr));
>  	hdr->command_id = cpu_to_be16(cmd);
>  	hdr->seq_no = cpu_to_be16(++wmi->tx_seq_id);
>  
> +	spin_lock_irqsave(&wmi->wmi_lock, flags);
> +	wmi->last_seq_id = wmi->tx_seq_id;
> +	spin_unlock_irqrestore(&wmi->wmi_lock, flags);
> +
>  	return htc_send_epid(wmi->htc, skb, wmi->ctrl_epid);
>  }
>  
> @@ -292,7 +297,6 @@ int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
>  	struct sk_buff *skb;
>  	u8 *data;
>  	int time_left, ret = 0;
> -	unsigned long flags;
>  
>  	if (ah->ah_flags & AH_UNPLUGGED)
>  		return 0;
> @@ -320,10 +324,6 @@ int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
>  	wmi->cmd_rsp_buf = rsp_buf;
>  	wmi->cmd_rsp_len = rsp_len;
>  
> -	spin_lock_irqsave(&wmi->wmi_lock, flags);
> -	wmi->last_cmd_id = cmd_id;
> -	spin_unlock_irqrestore(&wmi->wmi_lock, flags);
> -
>  	ret = ath9k_wmi_cmd_issue(wmi, skb, cmd_id, cmd_len);
>  	if (ret)
>  		goto out;
> diff --git a/drivers/net/wireless/ath/ath9k/wmi.h b/drivers/net/wireless/ath/ath9k/wmi.h
> index 0db37f2..2aad6dc 100644
> --- a/drivers/net/wireless/ath/ath9k/wmi.h
> +++ b/drivers/net/wireless/ath/ath9k/wmi.h
> @@ -143,7 +143,7 @@ struct wmi {
>  	enum htc_endpoint_id ctrl_epid;
>  	struct mutex op_mutex;
>  	struct completion cmd_wait;
> -	enum wmi_cmd_id last_cmd_id;
> +	u16 last_seq_id;
>  	struct sk_buff_head wmi_event_queue;
>  	struct tasklet_struct wmi_event_tasklet;
>  	u16 tx_seq_id;
>
fred.chou.nd@gmail.com March 16, 2015, 4:41 a.m. UTC | #2 
On 15/03/2015 14:48, Oleksij Rempel wrote:
> thank you for your patch. Looks good for me. Did you tested it?

Yes. Working all right for two days.
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fred.chou.nd@gmail.com April 6, 2015, 6:33 a.m. UTC | #3 
Hi all,

May I have an update on the patch status please?

Thanks and regards,
Fred

On 13/3/2015 4:32 PM, Fred Chou wrote:
> From: Fred Chou <fred.chou.nd@gmail.com>
> 
> As the driver may send multiple wmi commands with identical cmd id,
> it is more robust to check seq number for timeout instead.
> 
> Signed-off-by: Fred Chou <fred.chou.nd@gmail.com>
> ---
>  drivers/net/wireless/ath/ath9k/wmi.c | 12 ++++++------
>  drivers/net/wireless/ath/ath9k/wmi.h |  2 +-
>  2 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/net/wireless/ath/ath9k/wmi.c b/drivers/net/wireless/ath/ath9k/wmi.c
> index 65c8894..aba909f 100644
> --- a/drivers/net/wireless/ath/ath9k/wmi.c
> +++ b/drivers/net/wireless/ath/ath9k/wmi.c
> @@ -224,7 +224,7 @@ static void ath9k_wmi_ctrl_rx(void *priv, struct sk_buff *skb,
>  
>  	/* Check if there has been a timeout. */
>  	spin_lock(&wmi->wmi_lock);
> -	if (cmd_id != wmi->last_cmd_id) {
> +	if (be16_to_cpu(hdr->seq_no) != wmi->last_seq_id) {
>  		spin_unlock(&wmi->wmi_lock);
>  		goto free_skb;
>  	}
> @@ -272,11 +272,16 @@ static int ath9k_wmi_cmd_issue(struct wmi *wmi,
>  			       enum wmi_cmd_id cmd, u16 len)
>  {
>  	struct wmi_cmd_hdr *hdr;
> +	unsigned long flags;
>  
>  	hdr = (struct wmi_cmd_hdr *) skb_push(skb, sizeof(struct wmi_cmd_hdr));
>  	hdr->command_id = cpu_to_be16(cmd);
>  	hdr->seq_no = cpu_to_be16(++wmi->tx_seq_id);
>  
> +	spin_lock_irqsave(&wmi->wmi_lock, flags);
> +	wmi->last_seq_id = wmi->tx_seq_id;
> +	spin_unlock_irqrestore(&wmi->wmi_lock, flags);
> +
>  	return htc_send_epid(wmi->htc, skb, wmi->ctrl_epid);
>  }
>  
> @@ -292,7 +297,6 @@ int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
>  	struct sk_buff *skb;
>  	u8 *data;
>  	int time_left, ret = 0;
> -	unsigned long flags;
>  
>  	if (ah->ah_flags & AH_UNPLUGGED)
>  		return 0;
> @@ -320,10 +324,6 @@ int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
>  	wmi->cmd_rsp_buf = rsp_buf;
>  	wmi->cmd_rsp_len = rsp_len;
>  
> -	spin_lock_irqsave(&wmi->wmi_lock, flags);
> -	wmi->last_cmd_id = cmd_id;
> -	spin_unlock_irqrestore(&wmi->wmi_lock, flags);
> -
>  	ret = ath9k_wmi_cmd_issue(wmi, skb, cmd_id, cmd_len);
>  	if (ret)
>  		goto out;
> diff --git a/drivers/net/wireless/ath/ath9k/wmi.h b/drivers/net/wireless/ath/ath9k/wmi.h
> index 0db37f2..2aad6dc 100644
> --- a/drivers/net/wireless/ath/ath9k/wmi.h
> +++ b/drivers/net/wireless/ath/ath9k/wmi.h
> @@ -143,7 +143,7 @@ struct wmi {
>  	enum htc_endpoint_id ctrl_epid;
>  	struct mutex op_mutex;
>  	struct completion cmd_wait;
> -	enum wmi_cmd_id last_cmd_id;
> +	u16 last_seq_id;
>  	struct sk_buff_head wmi_event_queue;
>  	struct tasklet_struct wmi_event_tasklet;
>  	u16 tx_seq_id;
> 
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Oleksij Rempel April 6, 2015, 10:01 a.m. UTC | #4 
Hi Kalle,

can you please apply this patch.

Am 06.04.2015 um 08:33 schrieb Fred Chou:
> Hi all,
> 
> May I have an update on the patch status please?
> 
> Thanks and regards,
> Fred
> 
> On 13/3/2015 4:32 PM, Fred Chou wrote:
>> From: Fred Chou <fred.chou.nd@gmail.com>
>>
>> As the driver may send multiple wmi commands with identical cmd id,
>> it is more robust to check seq number for timeout instead.
>>
>> Signed-off-by: Fred Chou <fred.chou.nd@gmail.com>
>> ---
>>  drivers/net/wireless/ath/ath9k/wmi.c | 12 ++++++------
>>  drivers/net/wireless/ath/ath9k/wmi.h |  2 +-
>>  2 files changed, 7 insertions(+), 7 deletions(-)
>>
>> diff --git a/drivers/net/wireless/ath/ath9k/wmi.c b/drivers/net/wireless/ath/ath9k/wmi.c
>> index 65c8894..aba909f 100644
>> --- a/drivers/net/wireless/ath/ath9k/wmi.c
>> +++ b/drivers/net/wireless/ath/ath9k/wmi.c
>> @@ -224,7 +224,7 @@ static void ath9k_wmi_ctrl_rx(void *priv, struct sk_buff *skb,
>>  
>>  	/* Check if there has been a timeout. */
>>  	spin_lock(&wmi->wmi_lock);
>> -	if (cmd_id != wmi->last_cmd_id) {
>> +	if (be16_to_cpu(hdr->seq_no) != wmi->last_seq_id) {
>>  		spin_unlock(&wmi->wmi_lock);
>>  		goto free_skb;
>>  	}
>> @@ -272,11 +272,16 @@ static int ath9k_wmi_cmd_issue(struct wmi *wmi,
>>  			       enum wmi_cmd_id cmd, u16 len)
>>  {
>>  	struct wmi_cmd_hdr *hdr;
>> +	unsigned long flags;
>>  
>>  	hdr = (struct wmi_cmd_hdr *) skb_push(skb, sizeof(struct wmi_cmd_hdr));
>>  	hdr->command_id = cpu_to_be16(cmd);
>>  	hdr->seq_no = cpu_to_be16(++wmi->tx_seq_id);
>>  
>> +	spin_lock_irqsave(&wmi->wmi_lock, flags);
>> +	wmi->last_seq_id = wmi->tx_seq_id;
>> +	spin_unlock_irqrestore(&wmi->wmi_lock, flags);
>> +
>>  	return htc_send_epid(wmi->htc, skb, wmi->ctrl_epid);
>>  }
>>  
>> @@ -292,7 +297,6 @@ int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
>>  	struct sk_buff *skb;
>>  	u8 *data;
>>  	int time_left, ret = 0;
>> -	unsigned long flags;
>>  
>>  	if (ah->ah_flags & AH_UNPLUGGED)
>>  		return 0;
>> @@ -320,10 +324,6 @@ int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
>>  	wmi->cmd_rsp_buf = rsp_buf;
>>  	wmi->cmd_rsp_len = rsp_len;
>>  
>> -	spin_lock_irqsave(&wmi->wmi_lock, flags);
>> -	wmi->last_cmd_id = cmd_id;
>> -	spin_unlock_irqrestore(&wmi->wmi_lock, flags);
>> -
>>  	ret = ath9k_wmi_cmd_issue(wmi, skb, cmd_id, cmd_len);
>>  	if (ret)
>>  		goto out;
>> diff --git a/drivers/net/wireless/ath/ath9k/wmi.h b/drivers/net/wireless/ath/ath9k/wmi.h
>> index 0db37f2..2aad6dc 100644
>> --- a/drivers/net/wireless/ath/ath9k/wmi.h
>> +++ b/drivers/net/wireless/ath/ath9k/wmi.h
>> @@ -143,7 +143,7 @@ struct wmi {
>>  	enum htc_endpoint_id ctrl_epid;
>>  	struct mutex op_mutex;
>>  	struct completion cmd_wait;
>> -	enum wmi_cmd_id last_cmd_id;
>> +	u16 last_seq_id;
>>  	struct sk_buff_head wmi_event_queue;
>>  	struct tasklet_struct wmi_event_tasklet;
>>  	u16 tx_seq_id;
>>
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>
Kalle Valo April 7, 2015, 5:08 p.m. UTC | #5 
> From: Fred Chou <fred.chou.nd@gmail.com>
> 
> As the driver may send multiple wmi commands with identical cmd id,
> it is more robust to check seq number for timeout instead.
> 
> Signed-off-by: Fred Chou <fred.chou.nd@gmail.com>

Thanks, applied to wireless-drivers-next.git.

Kalle Valo
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diff mbox

Patch

diff --git a/drivers/net/wireless/ath/ath9k/wmi.c b/drivers/net/wireless/ath/ath9k/wmi.c
index 65c8894..aba909f 100644
--- a/drivers/net/wireless/ath/ath9k/wmi.c
+++ b/drivers/net/wireless/ath/ath9k/wmi.c
@@ -224,7 +224,7 @@  static void ath9k_wmi_ctrl_rx(void *priv, struct sk_buff *skb,
 
 	/* Check if there has been a timeout. */
 	spin_lock(&wmi->wmi_lock);
-	if (cmd_id != wmi->last_cmd_id) {
+	if (be16_to_cpu(hdr->seq_no) != wmi->last_seq_id) {
 		spin_unlock(&wmi->wmi_lock);
 		goto free_skb;
 	}
@@ -272,11 +272,16 @@  static int ath9k_wmi_cmd_issue(struct wmi *wmi,
 			       enum wmi_cmd_id cmd, u16 len)
 {
 	struct wmi_cmd_hdr *hdr;
+	unsigned long flags;
 
 	hdr = (struct wmi_cmd_hdr *) skb_push(skb, sizeof(struct wmi_cmd_hdr));
 	hdr->command_id = cpu_to_be16(cmd);
 	hdr->seq_no = cpu_to_be16(++wmi->tx_seq_id);
 
+	spin_lock_irqsave(&wmi->wmi_lock, flags);
+	wmi->last_seq_id = wmi->tx_seq_id;
+	spin_unlock_irqrestore(&wmi->wmi_lock, flags);
+
 	return htc_send_epid(wmi->htc, skb, wmi->ctrl_epid);
 }
 
@@ -292,7 +297,6 @@  int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
 	struct sk_buff *skb;
 	u8 *data;
 	int time_left, ret = 0;
-	unsigned long flags;
 
 	if (ah->ah_flags & AH_UNPLUGGED)
 		return 0;
@@ -320,10 +324,6 @@  int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
 	wmi->cmd_rsp_buf = rsp_buf;
 	wmi->cmd_rsp_len = rsp_len;
 
-	spin_lock_irqsave(&wmi->wmi_lock, flags);
-	wmi->last_cmd_id = cmd_id;
-	spin_unlock_irqrestore(&wmi->wmi_lock, flags);
-
 	ret = ath9k_wmi_cmd_issue(wmi, skb, cmd_id, cmd_len);
 	if (ret)
 		goto out;
diff --git a/drivers/net/wireless/ath/ath9k/wmi.h b/drivers/net/wireless/ath/ath9k/wmi.h
index 0db37f2..2aad6dc 100644
--- a/drivers/net/wireless/ath/ath9k/wmi.h
+++ b/drivers/net/wireless/ath/ath9k/wmi.h
@@ -143,7 +143,7 @@  struct wmi {
 	enum htc_endpoint_id ctrl_epid;
 	struct mutex op_mutex;
 	struct completion cmd_wait;
-	enum wmi_cmd_id last_cmd_id;
+	u16 last_seq_id;
 	struct sk_buff_head wmi_event_queue;
 	struct tasklet_struct wmi_event_tasklet;
 	u16 tx_seq_id;