[PATCH 2/2] watchdog: sbsa_gwdt: Enable the WDOG_STOP_ON_PANIC
From: George Cherian <hidden>
Date: 2025-02-21 02:36:22
Also in:
linux-watchdog, lkml
Subsystem:
documentation, the rest, watchdog device drivers · Maintainers:
Jonathan Corbet, Linus Torvalds, Wim Van Sebroeck, Guenter Roeck
Enable the watchdog stop on panic feature if the module parameter panicnotify is set. sbsa_gwdt.panicnotify=1 will disable the watchdog in panic situations. This helps in avoiding watchdog reset while booting kdump kernel. Signed-off-by: George Cherian <redacted> --- Documentation/watchdog/watchdog-parameters.rst | 3 +++ drivers/watchdog/sbsa_gwdt.c | 6 ++++++ 2 files changed, 9 insertions(+)
diff --git a/Documentation/watchdog/watchdog-parameters.rst b/Documentation/watchdog/watchdog-parameters.rst
index 0a0119edfa82..3d7a02d12dc3 100644
--- a/Documentation/watchdog/watchdog-parameters.rst
+++ b/Documentation/watchdog/watchdog-parameters.rst@@ -523,6 +523,9 @@ sbsa_gwdt: nowayout: Watchdog cannot be stopped once started (default=kernel config parameter) + panicnotify: + Watchdog to be stopped after kernel panic + (default=0, don't stop watchdog on panic) -------------------------------------------------
diff --git a/drivers/watchdog/sbsa_gwdt.c b/drivers/watchdog/sbsa_gwdt.c
index 5f23913ce3b4..f289a0b32d30 100644
--- a/drivers/watchdog/sbsa_gwdt.c
+++ b/drivers/watchdog/sbsa_gwdt.c@@ -116,6 +116,9 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); +static int panicnotify; +module_param(panicnotify, int, 0); +MODULE_PARM_DESC(panicnotify, "after kernel panic, do: 0 = don't stop wd(*) 1 = stop wd"); /* * Arm Base System Architecture 1.0 introduces watchdog v1 which * increases the length watchdog offset register to 48 bits.
@@ -307,6 +310,9 @@ static int sbsa_gwdt_probe(struct platform_device *pdev) if (status & SBSA_GWDT_WCS_EN) set_bit(WDOG_HW_RUNNING, &wdd->status); + if (!nowayout && panicnotify) + watchdog_stop_on_panic(wdd); + if (action) { irq = platform_get_irq(pdev, 0); if (irq < 0) {
--
2.34.1