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[MIPS] SMTC: Fix crash if # of TC's > # of VPE's after pt_regs irq cleanup.

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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle 2006-10-31 22:49:04 +00:00
parent 242954b5aa
commit cb56837ea5
2 changed files with 9 additions and 1 deletions
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3
arch/mips/kernel/entry.S
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@ -83,7 +83,10 @@ FEXPORT(syscall_exit)
FEXPORT(restore_all) # restore full frame FEXPORT(restore_all) # restore full frame
#ifdef CONFIG_MIPS_MT_SMTC #ifdef CONFIG_MIPS_MT_SMTC
/* Detect and execute deferred IPI "interrupts" */ /* Detect and execute deferred IPI "interrupts" */
LONG_L s0, TI_REGS($28)
LONG_S sp, TI_REGS($28)
jal deferred_smtc_ipi jal deferred_smtc_ipi
LONG_S s0, TI_REGS($28)
/* Re-arm any temporarily masked interrupts not explicitly "acked" */ /* Re-arm any temporarily masked interrupts not explicitly "acked" */
mfc0 v0, CP0_TCSTATUS mfc0 v0, CP0_TCSTATUS
ori v1, v0, TCSTATUS_IXMT ori v1, v0, TCSTATUS_IXMT

7
arch/mips/kernel/smtc-asm.S
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@ -101,7 +101,9 @@ FEXPORT(__smtc_ipi_vector)
lw t0,PT_PADSLOT5(sp) lw t0,PT_PADSLOT5(sp)
/* Argument from sender passed in stack pad slot 4 */ /* Argument from sender passed in stack pad slot 4 */
lw a0,PT_PADSLOT4(sp) lw a0,PT_PADSLOT4(sp)
PTR_LA ra, _ret_from_irq LONG_L s0, TI_REGS($28)
LONG_S sp, TI_REGS($28)
PTR_LA ra, ret_from_irq
jr t0 jr t0
/* /*
@ -119,7 +121,10 @@ LEAF(self_ipi)
subu t1,sp,PT_SIZE subu t1,sp,PT_SIZE
sw ra,PT_EPC(t1) sw ra,PT_EPC(t1)
sw a0,PT_PADSLOT4(t1) sw a0,PT_PADSLOT4(t1)
LONG_L s0, TI_REGS($28)
LONG_S sp, TI_REGS($28)
la t2,ipi_decode la t2,ipi_decode
LONG_S s0, TI_REGS($28)
sw t2,PT_PADSLOT5(t1) sw t2,PT_PADSLOT5(t1)
/* Save pre-disable value of TCStatus */ /* Save pre-disable value of TCStatus */
sw t0,PT_TCSTATUS(t1) sw t0,PT_TCSTATUS(t1)