From: Rafał Miłecki <rafal@xxxxxxxxxx>
Normally firmware messages are printed with debugging enabled only. It's
a good idea as firmware may print a lot of messages that normal users
don't need to care about.
However, on firmware crash, it may be very helpful to log all recent
messages. There is almost always a backtrace available as well as rought
info on the latest actions/state.
Signed-off-by: Rafał Miłecki <rafal@xxxxxxxxxx>
Reviewed-by: Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx>
---
V2: Use "bool" for brcmf_pcie_bus_console_read() error argument
---
.../broadcom/brcm80211/brcmfmac/pcie.c | 24 ++++++++++++++-----
1 file changed, 18 insertions(+), 6 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
index 637973fe8928..594c14be5df0 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
@@ -764,15 +764,22 @@ static void brcmf_pcie_bus_console_init(struct brcmf_pciedev_info *devinfo)
console->base_addr, console->buf_addr, console->bufsize);
}
-
-static void brcmf_pcie_bus_console_read(struct brcmf_pciedev_info *devinfo)
+/**
+ * brcmf_pcie_bus_console_read - reads firmware messages
+ *
+ * @error: specifies if error has occurred (prints messages unconditionally)
+ */
+static void brcmf_pcie_bus_console_read(struct brcmf_pciedev_info *devinfo,
+ bool error)
{
+ struct pci_dev *pdev = devinfo->pdev;
+ struct brcmf_bus *bus = dev_get_drvdata(&pdev->dev);
struct brcmf_pcie_console *console;
u32 addr;
u8 ch;
u32 newidx;
- if (!BRCMF_FWCON_ON())
+ if (!error && !BRCMF_FWCON_ON())
return;
console = &devinfo->shared.console;
@@ -796,7 +803,10 @@ static void brcmf_pcie_bus_console_read(struct brcmf_pciedev_info *devinfo)
}
if (ch == '\n') {
console->log_str[console->log_idx] = 0;
- pr_debug("CONSOLE: %s", console->log_str);
+ if (error)
+ brcmf_err(bus, "CONSOLE: %s", console->log_str);
+ else
+ pr_debug("CONSOLE: %s", console->log_str);
console->log_idx = 0;
}
}
@@ -857,7 +867,7 @@ static irqreturn_t brcmf_pcie_isr_thread(int irq, void *arg)
&devinfo->pdev->dev);
}
}
- brcmf_pcie_bus_console_read(devinfo);
+ brcmf_pcie_bus_console_read(devinfo, false);
if (devinfo->state == BRCMFMAC_PCIE_STATE_UP)
brcmf_pcie_intr_enable(devinfo);
devinfo->in_irq = false;
@@ -1426,6 +1436,8 @@ static int brcmf_pcie_reset(struct device *dev)
struct brcmf_fw_request *fwreq;
int err;
+ brcmf_pcie_bus_console_read(devinfo, true);
+
brcmf_detach(dev);
brcmf_pcie_release_irq(devinfo);
@@ -1824,7 +1836,7 @@ static void brcmf_pcie_setup(struct device *dev, int ret,
if (brcmf_attach(&devinfo->pdev->dev, devinfo->settings) == 0)
return;
- brcmf_pcie_bus_console_read(devinfo);
+ brcmf_pcie_bus_console_read(devinfo, false);
fail:
device_release_driver(dev);
--
2.21.0
