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authorToshi Kani <toshi.kani@hp.com>2012-08-27 12:52:24 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-10-02 09:47:27 -0700
commit5001e3e06b4da65f189c77c35183399cc87adf5f (patch)
treee9dff342c06c5d015d2dc7495da103f5a8de6cdd
parent9d1abc4c1f74a2c6d48217bd6874e3f12a025547 (diff)
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hpwdt: Fix kdump issue in hpwdt
commit 308b135e4fcc00c80c07e0e04e7afa8edf78583c upstream. kdump can be interrupted by watchdog timer when the timer is left activated on the crash kernel. Changed the hpwdt driver to disable watchdog timer at boot-time. This assures that watchdog timer is disabled until /dev/watchdog is opened, and prevents watchdog timer to be left running on the crash kernel. Signed-off-by: Toshi Kani <toshi.kani@hp.com> Tested-by: Lisa Mitchell <lisa.mitchell@hp.com> Signed-off-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/watchdog/hpwdt.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c
index d4ab797..479484f 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -773,6 +773,9 @@ static int __devinit hpwdt_init_one(struct pci_dev *dev,
hpwdt_timer_reg = pci_mem_addr + 0x70;
hpwdt_timer_con = pci_mem_addr + 0x72;
+ /* Make sure that timer is disabled until /dev/watchdog is opened */
+ hpwdt_stop();
+
/* Make sure that we have a valid soft_margin */
if (hpwdt_change_timer(soft_margin))
hpwdt_change_timer(DEFAULT_MARGIN);