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authorToshi Kani <toshi.kani@hp.com>2012-08-27 22:52:24 +0400
committerWim Van Sebroeck <wim@iguana.be>2012-09-10 19:28:08 +0400
commit308b135e4fcc00c80c07e0e04e7afa8edf78583c (patch)
tree37aae22d47d5e328a6048937ca382a7886ef1e56 /drivers/watchdog
parent55d512e245bc7699a8800e23df1a24195dd08217 (diff)
downloadlinux-308b135e4fcc00c80c07e0e04e7afa8edf78583c.tar.xz
hpwdt: Fix kdump issue in hpwdt
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> Cc: stable <stable@vger.kernel.org>
Diffstat (limited to 'drivers/watchdog')
-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 1eff743ec497..ae60406ea8a1 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -814,6 +814,9 @@ 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);