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ath9k_htc: check seq number instead of cmd id for timeout

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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>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Fred Chou 2015-03-13 16:32:38 +08:00 committed by Kalle Valo
parent 6dcaac59d0
commit 00ca18034f
2 changed files with 7 additions and 7 deletions
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12
drivers/net/wireless/ath/ath9k/wmi.c
View File

@ -227,7 +227,7 @@ 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;
}
@ -275,11 +275,16 @@ 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);
}
@ -295,7 +300,6 @@ 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;
@ -323,10 +327,6 @@ 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;

2
drivers/net/wireless/ath/ath9k/wmi.h
View File

@ -151,7 +151,7 @@ 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;