[ath9k-devel] [PATCH 13/13] ath9k_htc: catch fw panic pattern

[Oleksij Rempel]

... and print what we get.

Signed-off-by: Oleksij Rempel <li...@rempel-privat.de>
---
 drivers/net/wireless/ath/ath9k/htc_hst.c | 36 ++++++++++++++++++++++++++++++++
 drivers/net/wireless/ath/ath9k/htc_hst.h | 12 +++++++++++
 2 files changed, 48 insertions(+)

diff --git a/drivers/net/wireless/ath/ath9k/htc_hst.c 
b/drivers/net/wireless/ath/ath9k/htc_hst.c
index aac4a40..a0ff5b6 100644
--- a/drivers/net/wireless/ath/ath9k/htc_hst.c
+++ b/drivers/net/wireless/ath/ath9k/htc_hst.c
@@ -358,6 +358,36 @@ ret:
                kfree_skb(skb);
 }
 
+static void ath9k_htc_fw_panic_report(struct htc_target *htc_handle,
+                                     struct sk_buff *skb)
+{
+       uint32_t *pattern = (uint32_t *)skb->data;
+
+       switch (*pattern) {
+       case 0x33221199:
+               {
+               struct htc_panic_bad_vaddr *htc_panic;
+               htc_panic = (struct htc_panic_bad_vaddr *) skb->data;
+               dev_err(htc_handle->dev, "ath: firmware panic! "
+                       "exccause: 0x%08x; pc: 0x%08x; badvaddr: 0x%08x.\n",
+                       htc_panic->exccause, htc_panic->pc,
+                       htc_panic->badvaddr);
+               break;
+               }
+       case 0x33221299:
+               {
+               struct htc_panic_bad_epid *htc_panic;
+               htc_panic = (struct htc_panic_bad_epid *) skb->data;
+               dev_err(htc_handle->dev, "ath: firmware panic! "
+                       "bad epid: 0x%08x\n", htc_panic->epid);
+               break;
+               }
+       default:
+               dev_err(htc_handle->dev, "ath: uknown panic pattern!\n");
+               break;
+       }
+}
+
 /*
  * HTC Messages are handled directly here and the obtained SKB
  * is freed.
@@ -379,6 +409,12 @@ void ath9k_htc_rx_msg(struct htc_target *htc_handle,
        htc_hdr = (struct htc_frame_hdr *) skb->data;
        epid = htc_hdr->endpoint_id;
 
+       if (epid == 0x99) {
+               ath9k_htc_fw_panic_report(htc_handle, skb);
+               kfree_skb(skb);
+               return;
+       }
+
        if (epid >= ENDPOINT_MAX) {
                if (pipe_id != USB_REG_IN_PIPE)
                        dev_kfree_skb_any(skb);
diff --git a/drivers/net/wireless/ath/ath9k/htc_hst.h 
b/drivers/net/wireless/ath/ath9k/htc_hst.h
index e1ffbb6..06474cc 100644
--- a/drivers/net/wireless/ath/ath9k/htc_hst.h
+++ b/drivers/net/wireless/ath/ath9k/htc_hst.h
@@ -77,6 +77,18 @@ struct htc_config_pipe_msg {
        u8 credits;
 } __packed;
 
+struct htc_panic_bad_vaddr {
+       __be32 pattern;
+       __be32 exccause;
+       __be32 pc;
+       __be32 badvaddr;
+} __packed;
+
+struct htc_panic_bad_epid {
+       __be32 pattern;
+       __be32 epid;
+} __packed;
+
 struct htc_ep_callbacks {
        void *priv;
        void (*tx) (void *, struct sk_buff *, enum htc_endpoint_id, bool txok);
-- 
1.8.5.3

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