[PATCH 7/8] brcmfmac: trigger memory dump upon firmware halt signal

[Arend van Spriel]

From: Franky Lin <franky....@broadcom.com>

PCIe dongle firmware signals a halt/trap through mailbox interrupt.
Trigger a memory dump upon receiving such signal could help to provide
useful information for issue debug.

Reviewed-by: Arend van Spriel <arend.vanspr...@broadcom.com>
Signed-off-by: Franky Lin <franky....@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspr...@broadcom.com>
---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c 
b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
index 5baa837..45928b5 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
@@ -182,6 +182,7 @@ enum brcmf_pcie_state {
 #define BRCMF_D2H_DEV_D3_ACK                   0x00000001
 #define BRCMF_D2H_DEV_DS_ENTER_REQ             0x00000002
 #define BRCMF_D2H_DEV_DS_EXIT_NOTE             0x00000004
+#define BRCMF_D2H_DEV_FWHALT                   0x10000000
 
 #define BRCMF_H2D_HOST_D3_INFORM               0x00000001
 #define BRCMF_H2D_HOST_DS_ACK                  0x00000002
@@ -717,6 +718,10 @@ static void brcmf_pcie_handle_mb_data(struct 
brcmf_pciedev_info *devinfo)
                devinfo->mbdata_completed = true;
                wake_up(&devinfo->mbdata_resp_wait);
        }
+       if (dtoh_mb_data & BRCMF_D2H_DEV_FWHALT) {
+               brcmf_dbg(PCIE, "D2H_MB_DATA: FW HALT\n");
+               brcmf_dev_coredump(&devinfo->pdev->dev);
+       }
 }
 
 
-- 
1.9.1