diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2011-05-28 18:27:59 +0400 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2011-07-21 02:12:10 +0400 |
| commit | 852fe3105e94ca26d1b3df7e2cb6878ebdd67608 (patch) | |
| tree | b38949922e762e4310b105eec24a9df5352804e4 /arch/mips/mti-malta/malta-init.c | |
| parent | b12acf163f6e52ff7d41aca51382dde17c506068 (diff) | |
| download | linux-852fe3105e94ca26d1b3df7e2cb6878ebdd67608.tar.xz | |
MIPS: Malta: Fix crash in SMP kernel on non-CMP systems.
Since 6be63bbbdab66b9185dc6f67c8b1bacb6f37f946 (lmo) rsp.
af3a1f6f4813907e143f87030cde67a9971db533 (kernel.org) the Malta code does
no longer probe for presence of GCMP if CMP is not configured. This means
that the variable gcmp_present well be left at its default value of -1
which normally is meant to indicate that GCMP has not yet been mmapped.
This non-zero value is now interpreted as GCMP being present resulting
in a write attempt to a GCMP register resulting in a crash.
Reported and a build fix on top of my fix by Rob Landley <rob@landley.net>.
Reported-by: Rob Landley <rob@landley.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/2413/
Diffstat (limited to 'arch/mips/mti-malta/malta-init.c')
| -rw-r--r-- | arch/mips/mti-malta/malta-init.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/arch/mips/mti-malta/malta-init.c b/arch/mips/mti-malta/malta-init.c index 31180c321a1a..4b988b9a30d5 100644 --- a/arch/mips/mti-malta/malta-init.c +++ b/arch/mips/mti-malta/malta-init.c @@ -28,6 +28,7 @@ #include <asm/io.h> #include <asm/system.h> #include <asm/cacheflush.h> +#include <asm/smp-ops.h> #include <asm/traps.h> #include <asm/gcmpregs.h> @@ -358,15 +359,14 @@ void __init prom_init(void) #ifdef CONFIG_SERIAL_8250_CONSOLE console_config(); #endif -#ifdef CONFIG_MIPS_CMP /* Early detection of CMP support */ if (gcmp_probe(GCMP_BASE_ADDR, GCMP_ADDRSPACE_SZ)) - register_smp_ops(&cmp_smp_ops); - else -#endif -#ifdef CONFIG_MIPS_MT_SMP - register_smp_ops(&vsmp_smp_ops); -#endif + if (!register_cmp_smp_ops()) + return; + + if (!register_vsmp_smp_ops()) + return; + #ifdef CONFIG_MIPS_MT_SMTC register_smp_ops(&msmtc_smp_ops); #endif |