From cb56837ea5f15fa5279fd490f292134c3a92e5de Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Tue, 31 Oct 2006 22:49:04 +0000 Subject: [PATCH] [MIPS] SMTC: Fix crash if # of TC's > # of VPE's after pt_regs irq cleanup. Signed-off-by: Ralf Baechle --- arch/mips/kernel/entry.S | 3 +++ arch/mips/kernel/smtc-asm.S | 7 ++++++- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S index 417c08ac76eb..f10b6a19f8bf 100644 --- a/arch/mips/kernel/entry.S +++ b/arch/mips/kernel/entry.S @@ -83,7 +83,10 @@ FEXPORT(syscall_exit) FEXPORT(restore_all) # restore full frame #ifdef CONFIG_MIPS_MT_SMTC /* Detect and execute deferred IPI "interrupts" */ + LONG_L s0, TI_REGS($28) + LONG_S sp, TI_REGS($28) jal deferred_smtc_ipi + LONG_S s0, TI_REGS($28) /* Re-arm any temporarily masked interrupts not explicitly "acked" */ mfc0 v0, CP0_TCSTATUS ori v1, v0, TCSTATUS_IXMT diff --git a/arch/mips/kernel/smtc-asm.S b/arch/mips/kernel/smtc-asm.S index 1cb9441f1474..921207c4a83c 100644 --- a/arch/mips/kernel/smtc-asm.S +++ b/arch/mips/kernel/smtc-asm.S @@ -101,7 +101,9 @@ FEXPORT(__smtc_ipi_vector) lw t0,PT_PADSLOT5(sp) /* Argument from sender passed in stack pad slot 4 */ 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 /* @@ -119,7 +121,10 @@ LEAF(self_ipi) subu t1,sp,PT_SIZE sw ra,PT_EPC(t1) sw a0,PT_PADSLOT4(t1) + LONG_L s0, TI_REGS($28) + LONG_S sp, TI_REGS($28) la t2,ipi_decode + LONG_S s0, TI_REGS($28) sw t2,PT_PADSLOT5(t1) /* Save pre-disable value of TCStatus */ sw t0,PT_TCSTATUS(t1) -- GitLab