diff options
| author | Jerry Hoemann <jerry.hoemann@hpe.com> | 2017-10-23 16:46:17 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-15 10:54:22 +0100 |
| commit | d40d7b332592d9e15c57afb7c00a37f5e1cb1df6 (patch) | |
| tree | 18d81c87222d0a25138cba382a675c5acac11cc3 /drivers/watchdog/hpwdt.c | |
| parent | 9a07f4a6befc34d8f91e5fa0069d063283705f3a (diff) | |
watchdog: hpwdt: Check source of NMI
commit 838534e50e2e5c1e644e30ab6cb28da88eb31368 upstream.
Do not claim the NMI (i.e. return NMI_DONE) if the source of
the NMI isn't the iLO watchdog or debug.
Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/watchdog/hpwdt.c')
| -rw-r--r-- | drivers/watchdog/hpwdt.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c index 9fd869fbd8a9..e61658310381 100644 --- a/drivers/watchdog/hpwdt.c +++ b/drivers/watchdog/hpwdt.c @@ -52,6 +52,7 @@ static char expect_release; static unsigned long hpwdt_is_open; static void __iomem *pci_mem_addr; /* the PCI-memory address */ +static unsigned long __iomem *hpwdt_nmistat; static unsigned long __iomem *hpwdt_timer_reg; static unsigned long __iomem *hpwdt_timer_con; @@ -474,6 +475,11 @@ static int hpwdt_time_left(void) return TICKS_TO_SECS(ioread16(hpwdt_timer_reg)); } +static int hpwdt_my_nmi(void) +{ + return ioread8(hpwdt_nmistat) & 0x6; +} + #ifdef CONFIG_HPWDT_NMI_DECODING /* * NMI Handler @@ -486,6 +492,9 @@ static int hpwdt_pretimeout(unsigned int ulReason, struct pt_regs *regs) if (!hpwdt_nmi_decoding) return NMI_DONE; + if ((ulReason == NMI_UNKNOWN) && !hpwdt_my_nmi()) + return NMI_DONE; + spin_lock_irqsave(&rom_lock, rom_pl); if (!die_nmi_called && !is_icru && !is_uefi) asminline_call(&cmn_regs, cru_rom_addr); @@ -842,6 +851,7 @@ static int hpwdt_init_one(struct pci_dev *dev, retval = -ENOMEM; goto error_pci_iomap; } + hpwdt_nmistat = pci_mem_addr + 0x6e; hpwdt_timer_reg = pci_mem_addr + 0x70; hpwdt_timer_con = pci_mem_addr + 0x72; |