ath9k_htc: catch fw panic pattern

... and print what we get.

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 48 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/htc_hst.c b/drivers/net/wireless/ath/ath9k/htc_hst.c
index aac4a406a513..a0ff5b637054 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 e1ffbb6bd636..06474ccc7696 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);