Having exception event dump in kernel log helps debugging the use cases
where snoop traces are not available.
dmesg:
[27.032666] Bluetooth: hci0: Exception occurred - type: 0xde
[27.032703] Bluetooth: hci0: ff 4f 87 80 03 01 01 de 07 01 de 06 1c ef be ad
[27.032729] Bluetooth: hci0: de ef be ad de ef be ad de ef be ad de ef be ad
[27.032753] Bluetooth: hci0: de ef be ad de ef be ad de 05 14 ef be ad de ef
[27.032778] Bluetooth: hci0: be ad de ef be ad de ef be ad de ef be ad de 43
[27.032803] Bluetooth: hci0: 10 ef be ad de ef be ad de ef be ad de ef be ad
[27.032827] Bluetooth: hci0: de
Signed-off-by: Kiran K <kiran.k@xxxxxxxxx>
---
drivers/bluetooth/btintel.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
index a19ebe47bd95..c0dbbd1a2032 100644
--- a/drivers/bluetooth/btintel.c
+++ b/drivers/bluetooth/btintel.c
@@ -3119,6 +3119,7 @@ EXPORT_SYMBOL_GPL(btintel_configure_setup);
static int btintel_diagnostics(struct hci_dev *hdev, struct sk_buff *skb)
{
struct intel_tlv *tlv = (void *)&skb->data[5];
+ char prefix[64];
/* The first event is always an event type TLV */
if (tlv->type != INTEL_TLV_TYPE_ID)
@@ -3129,6 +3130,12 @@ static int btintel_diagnostics(struct hci_dev *hdev, struct sk_buff *skb)
case INTEL_TLV_FATAL_EXCEPTION:
case INTEL_TLV_DEBUG_EXCEPTION:
case INTEL_TLV_TEST_EXCEPTION:
+ bt_dev_err(hdev, "Exception occurred - type: 0x%2.2x",
+ tlv->val[0]);
+ snprintf(prefix, sizeof(prefix), "Bluetooth: %s: ",
+ bt_dev_name(hdev));
+ print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_NONE, 16, 1,
+ skb->data, skb->len, false);
/* Generate devcoredump from exception */
if (!hci_devcd_init(hdev, skb->len)) {
hci_devcd_append(hdev, skb);
--
2.34.1
