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| author | Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> | 2016-03-22 14:27:24 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-22 15:36:02 -0700 |
| commit | abc514c58059ca6f02df41798e828ffd864f1d21 (patch) | |
| tree | b19d5a3cead82b2a6d4af1f2fff63041f7f2960e /drivers/watchdog | |
| parent | 73cbf4a1ddfab247f9018550637c28a7d8dd9108 (diff) | |
| download | linux-abc514c58059ca6f02df41798e828ffd864f1d21.tar.gz linux-abc514c58059ca6f02df41798e828ffd864f1d21.tar.bz2 linux-abc514c58059ca6f02df41798e828ffd864f1d21.zip | |
hpwdt: use nmi_panic() when kernel panics in NMI handler
Commit 1717f2096b54 ("panic, x86: Fix re-entrance problem due to panic
on NMI") introduced nmi_panic() which prevents concurrent and recursive
execution of panic(). It also saves registers for the crash dump on x86
by later commit 58c5661f2144 ("panic, x86: Allow CPUs to save registers
even if looping in NMI context").
hpwdt driver can call panic() from NMI handler, so replace it with
nmi_panic(). Also, do some cleanups.
Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Cc: Thomas Mingarelli <thomas.mingarelli@hpe.com>
Cc: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/hpwdt.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c index 8fc284cdce4e..8f89bd8a826a 100644 --- a/drivers/watchdog/hpwdt.c +++ b/drivers/watchdog/hpwdt.c @@ -484,7 +484,7 @@ static int hpwdt_pretimeout(unsigned int ulReason, struct pt_regs *regs) static int die_nmi_called; if (!hpwdt_nmi_decoding) - goto out; + return NMI_DONE; spin_lock_irqsave(&rom_lock, rom_pl); if (!die_nmi_called && !is_icru && !is_uefi) @@ -497,11 +497,11 @@ static int hpwdt_pretimeout(unsigned int ulReason, struct pt_regs *regs) if (!is_icru && !is_uefi) { if (cmn_regs.u1.ral == 0) { - panic("An NMI occurred, " - "but unable to determine source.\n"); + nmi_panic(regs, "An NMI occurred, but unable to determine source.\n"); + return NMI_HANDLED; } } - panic("An NMI occurred. Depending on your system the reason " + nmi_panic(regs, "An NMI occurred. Depending on your system the reason " "for the NMI is logged in any one of the following " "resources:\n" "1. Integrated Management Log (IML)\n" @@ -509,8 +509,7 @@ static int hpwdt_pretimeout(unsigned int ulReason, struct pt_regs *regs) "3. OA Forward Progress Log\n" "4. iLO Event Log"); -out: - return NMI_DONE; + return NMI_HANDLED; } #endif /* CONFIG_HPWDT_NMI_DECODING */ |