diff options
author | Ralf Baechle <ralf@linux-mips.org> | 2011-05-28 15:27:59 +0100 |
---|---|---|
committer | Ralf Baechle <ralf@linux-mips.org> | 2011-07-20 23:12:10 +0100 |
commit | 852fe3105e94ca26d1b3df7e2cb6878ebdd67608 (patch) | |
tree | b38949922e762e4310b105eec24a9df5352804e4 /arch | |
parent | b12acf163f6e52ff7d41aca51382dde17c506068 (diff) |
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')
-rw-r--r-- | arch/mips/include/asm/smp-ops.h | 41 | ||||
-rw-r--r-- | arch/mips/mipssim/sim_setup.c | 17 | ||||
-rw-r--r-- | arch/mips/mti-malta/malta-init.c | 14 | ||||
-rw-r--r-- | arch/mips/pmc-sierra/msp71xx/msp_setup.c | 8 |
4 files changed, 56 insertions, 24 deletions
diff --git a/arch/mips/include/asm/smp-ops.h b/arch/mips/include/asm/smp-ops.h index 9e09af34c8a..48b03fff31e 100644 --- a/arch/mips/include/asm/smp-ops.h +++ b/arch/mips/include/asm/smp-ops.h @@ -56,8 +56,43 @@ static inline void register_smp_ops(struct plat_smp_ops *ops) #endif /* !CONFIG_SMP */ -extern struct plat_smp_ops up_smp_ops; -extern struct plat_smp_ops cmp_smp_ops; -extern struct plat_smp_ops vsmp_smp_ops; +static inline int register_up_smp_ops(void) +{ +#ifdef CONFIG_SMP_UP + extern struct plat_smp_ops up_smp_ops; + + register_smp_ops(&up_smp_ops); + + return 0; +#else + return -ENODEV; +#endif +} + +static inline int register_cmp_smp_ops(void) +{ +#ifdef CONFIG_MIPS_CMP + extern struct plat_smp_ops cmp_smp_ops; + + register_smp_ops(&cmp_smp_ops); + + return 0; +#else + return -ENODEV; +#endif +} + +static inline int register_vsmp_smp_ops(void) +{ +#ifdef CONFIG_MIPS_MT_SMP + extern struct plat_smp_ops vsmp_smp_ops; + + register_smp_ops(&vsmp_smp_ops); + + return 0; +#else + return -ENODEV; +#endif +} #endif /* __ASM_SMP_OPS_H */ diff --git a/arch/mips/mipssim/sim_setup.c b/arch/mips/mipssim/sim_setup.c index 55f22a3afe6..19700696a84 100644 --- a/arch/mips/mipssim/sim_setup.c +++ b/arch/mips/mipssim/sim_setup.c @@ -59,18 +59,17 @@ void __init prom_init(void) prom_meminit(); -#ifdef CONFIG_MIPS_MT_SMP - if (cpu_has_mipsmt) - register_smp_ops(&vsmp_smp_ops); - else - register_smp_ops(&up_smp_ops); -#endif + if (cpu_has_mipsmt) { + if (!register_vsmp_smp_ops()) + return; + #ifdef CONFIG_MIPS_MT_SMTC - if (cpu_has_mipsmt) register_smp_ops(&ssmtc_smp_ops); - else - register_smp_ops(&up_smp_ops); + return; #endif + } + + register_up_smp_ops(); } static void __init serial_init(void) diff --git a/arch/mips/mti-malta/malta-init.c b/arch/mips/mti-malta/malta-init.c index 31180c321a1..4b988b9a30d 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 diff --git a/arch/mips/pmc-sierra/msp71xx/msp_setup.c b/arch/mips/pmc-sierra/msp71xx/msp_setup.c index 2413ea67877..0abfbe04ffc 100644 --- a/arch/mips/pmc-sierra/msp71xx/msp_setup.c +++ b/arch/mips/pmc-sierra/msp71xx/msp_setup.c @@ -228,13 +228,11 @@ void __init prom_init(void) */ msp_serial_setup(); -#ifdef CONFIG_MIPS_MT_SMP - register_smp_ops(&vsmp_smp_ops); -#endif - + if (register_vsmp_smp_ops()) { #ifdef CONFIG_MIPS_MT_SMTC - register_smp_ops(&msp_smtc_smp_ops); + register_smp_ops(&msp_smtc_smp_ops); #endif + } #ifdef CONFIG_PMCTWILED /* |