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authorLinus Torvalds <torvalds@linux-foundation.org>2020-09-17 11:30:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-09-17 11:30:36 -0700
commit4cbffc461ec91287c4cb1d0e27b01b988d0b8fba (patch)
tree5d8f7a4bbb99107a45b40fc8ab7d6c95a462edaa /arch
parent5ef64cc8987a9211d3f3667331ba3411a94ddc79 (diff)
parentb959b97860d0fee8c8f6a3e641d3c2ad76eab6be (diff)
Merge tag 'mips_fixes_5.9_2' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux
Pull MIPS fixes from Thomas Bogendoerfer: "Two small fixes for SNI machines" * tag 'mips_fixes_5.9_2' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: MIPS: SNI: Fix spurious interrupts MIPS: SNI: Fix MIPS_L1_CACHE_SHIFT
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/Kconfig1
-rw-r--r--arch/mips/sni/a20r.c9
2 files changed, 8 insertions, 2 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index c95fa3a2484c..8f328298f8cc 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -877,6 +877,7 @@ config SNI_RM
select I8253
select I8259
select ISA
+ select MIPS_L1_CACHE_SHIFT_6
select SWAP_IO_SPACE if CPU_BIG_ENDIAN
select SYS_HAS_CPU_R4X00
select SYS_HAS_CPU_R5000
diff --git a/arch/mips/sni/a20r.c b/arch/mips/sni/a20r.c
index b09dc844985a..eeeec18c420a 100644
--- a/arch/mips/sni/a20r.c
+++ b/arch/mips/sni/a20r.c
@@ -143,7 +143,10 @@ static struct platform_device sc26xx_pdev = {
},
};
-static u32 a20r_ack_hwint(void)
+/*
+ * Trigger chipset to update CPU's CAUSE IP field
+ */
+static u32 a20r_update_cause_ip(void)
{
u32 status = read_c0_status();
@@ -205,12 +208,14 @@ static void a20r_hwint(void)
int irq;
clear_c0_status(IE_IRQ0);
- status = a20r_ack_hwint();
+ status = a20r_update_cause_ip();
cause = read_c0_cause();
irq = ffs(((cause & status) >> 8) & 0xf8);
if (likely(irq > 0))
do_IRQ(SNI_A20R_IRQ_BASE + irq - 1);
+
+ a20r_update_cause_ip();
set_c0_status(IE_IRQ0);
}