Subject: [PATCH v2] MIPS: pass non-NULL dev_id on shared request_irq()

From: afzal mohammed <[email-masked]>
Date: Sat, 14 Mar 2020 13:43:12 +0530

Recently all usages of setup_irq() was replaced by request_irq().
request_irq() does a few sanity checks that were not done in
setup_irq(), if they fail irq registration will fail. One of the check
is to ensure that non-NULL dev_id is passed in the case of shared irq.
This caused malta on qemu to hang.

Fix it by passing handler as dev_id to all request_irq()'s that are
shared. For sni, instead of passing non-NULL dev_id, remove shared irq
flags.

Fixes: ac8fd122e070 ("MIPS: Replace setup_irq() by request_irq()")
Reported-by: Nathan Chancellor <[email-masked]>
Suggested-by: Thomas Bogendoerfer <[email-masked]>
Signed-off-by: afzal mohammed <[email-masked]>
---

v2:
 * use handler for dev_id
 * remove shared irq flags for sni

 arch/mips/dec/setup.c                 | 2 +-
 arch/mips/kernel/cevt-r4k.c           | 3 ++-
 arch/mips/loongson2ef/lemote-2f/irq.c | 2 +-
 arch/mips/pmcs-msp71xx/msp_time.c     | 2 +-
 arch/mips/sni/a20r.c                  | 4 ++--
 arch/mips/sni/pcit.c                  | 8 ++++----
 arch/mips/sni/rm200.c                 | 6 +++---
 7 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/arch/mips/dec/setup.c b/arch/mips/dec/setup.c
index c8bbac0c5051..d4e868b828e5 100644
--- a/arch/mips/dec/setup.c
+++ b/arch/mips/dec/setup.c
@@ -758,7 +758,7 @@ void __init arch_init_irq(void)
 	/* Register the bus error interrupt. */
 	if (dec_interrupt[DEC_IRQ_BUS] >= 0 && busirq_handler) {
 		if (request_irq(dec_interrupt[DEC_IRQ_BUS], busirq_handler,
-				busirq_flags, "bus error", NULL))
+				busirq_flags, "bus error", busirq_handler))
 			pr_err("Failed to register bus error interrupt\n");
 	}
 	/* Register the HALT interrupt. */
diff --git a/arch/mips/kernel/cevt-r4k.c b/arch/mips/kernel/cevt-r4k.c
index 64e917dfe6b2..17a9cbb8b3df 100644
--- a/arch/mips/kernel/cevt-r4k.c
+++ b/arch/mips/kernel/cevt-r4k.c
@@ -292,7 +292,8 @@ int r4k_clockevent_init(void)
 
 	cp0_timer_irq_installed = 1;
 
-	if (request_irq(irq, c0_compare_interrupt, flags, "timer", NULL))
+	if (request_irq(irq, c0_compare_interrupt, flags, "timer",
+			c0_compare_interrupt))
 		pr_err("Failed to request irq %d (timer)\n", irq);
 
 	return 0;
diff --git a/arch/mips/loongson2ef/lemote-2f/irq.c b/arch/mips/loongson2ef/lemote-2f/irq.c
index 34e15e8b7a8f..6f00579971a3 100644
--- a/arch/mips/loongson2ef/lemote-2f/irq.c
+++ b/arch/mips/loongson2ef/lemote-2f/irq.c
@@ -109,7 +109,7 @@ void __init mach_init_irq(void)
 
 	/* setup north bridge irq (bonito) */
 	if (request_irq(LOONGSON_NORTH_BRIDGE_IRQ, ip6_action,
-			IRQF_SHARED | IRQF_NO_THREAD, "cascade", NULL))
+			IRQF_SHARED | IRQF_NO_THREAD, "cascade", ip6_action))
 		pr_err("Failed to register north bridge cascade interrupt\n");
 	/* setup source bridge irq (i8259) */
 	if (request_irq(LOONGSON_SOUTH_BRIDGE_IRQ, no_action,
diff --git a/arch/mips/pmcs-msp71xx/msp_time.c b/arch/mips/pmcs-msp71xx/msp_time.c
index baf0da8b4c98..9c629829f447 100644
--- a/arch/mips/pmcs-msp71xx/msp_time.c
+++ b/arch/mips/pmcs-msp71xx/msp_time.c
@@ -81,7 +81,7 @@ unsigned int get_c0_compare_int(void)
 	/* MIPS_MT modes may want timer for second VPE */
 	if ((get_current_vpe()) && !tim_installed) {
 		if (request_irq(MSP_INT_VPE1_TIMER, c0_compare_interrupt, flags,
-				"timer", NULL))
+				"timer", c0_compare_interrupt))
 			pr_err("Failed to register timer interrupt\n");
 		tim_installed++;
 	}
diff --git a/arch/mips/sni/a20r.c b/arch/mips/sni/a20r.c
index ba966d62fb4b..0ecffb65fd6d 100644
--- a/arch/mips/sni/a20r.c
+++ b/arch/mips/sni/a20r.c
@@ -222,8 +222,8 @@ void __init sni_a20r_irq_init(void)
 		irq_set_chip_and_handler(i, &a20r_irq_type, handle_level_irq);
 	sni_hwint = a20r_hwint;
 	change_c0_status(ST0_IM, IE_IRQ0);
-	if (request_irq(SNI_A20R_IRQ_BASE + 3, sni_isa_irq_handler,
-			IRQF_SHARED, "ISA", NULL))
+	if (request_irq(SNI_A20R_IRQ_BASE + 3, sni_isa_irq_handler, 0, "ISA",
+			NULL))
 		pr_err("Failed to register ISA interrupt\n");
 }
 
diff --git a/arch/mips/sni/pcit.c b/arch/mips/sni/pcit.c
index 4a850ab03398..b331fe22c529 100644
--- a/arch/mips/sni/pcit.c
+++ b/arch/mips/sni/pcit.c
@@ -244,8 +244,8 @@ void __init sni_pcit_irq_init(void)
 	*(volatile u32 *)SNI_PCIT_INT_REG = 0;
 	sni_hwint = sni_pcit_hwint;
 	change_c0_status(ST0_IM, IE_IRQ1);
-	if (request_irq(SNI_PCIT_INT_START + 6, sni_isa_irq_handler,
-			IRQF_SHARED, "ISA", NULL))
+	if (request_irq(SNI_PCIT_INT_START + 6, sni_isa_irq_handler, 0, "ISA",
+			NULL))
 		pr_err("Failed to register ISA interrupt\n");
 }
 
@@ -259,8 +259,8 @@ void __init sni_pcit_cplus_irq_init(void)
 	*(volatile u32 *)SNI_PCIT_INT_REG = 0x40000000;
 	sni_hwint = sni_pcit_hwint_cplus;
 	change_c0_status(ST0_IM, IE_IRQ0);
-	if (request_irq(MIPS_CPU_IRQ_BASE + 3, sni_isa_irq_handler,
-			IRQF_SHARED, "ISA", NULL))
+	if (request_irq(MIPS_CPU_IRQ_BASE + 3, sni_isa_irq_handler, 0, "ISA",
+			NULL))
 		pr_err("Failed to register ISA interrupt\n");
 }
 
diff --git a/arch/mips/sni/rm200.c b/arch/mips/sni/rm200.c
index ba1f2fc6a43e..d84744ca871d 100644
--- a/arch/mips/sni/rm200.c
+++ b/arch/mips/sni/rm200.c
@@ -473,10 +473,10 @@ void __init sni_rm200_irq_init(void)
 	sni_hwint = sni_rm200_hwint;
 	change_c0_status(ST0_IM, IE_IRQ0);
 	if (request_irq(SNI_RM200_INT_START + 0, sni_rm200_i8259A_irq_handler,
-			IRQF_SHARED, "onboard ISA", NULL))
+			0, "onboard ISA", NULL))
 		pr_err("Failed to register onboard ISA interrupt\n");
-	if (request_irq(SNI_RM200_INT_START + 1, sni_isa_irq_handler,
-			IRQF_SHARED, "ISA", NULL))
+	if (request_irq(SNI_RM200_INT_START + 1, sni_isa_irq_handler, 0, "ISA",
+			NULL))
 		pr_err("Failed to register ISA interrupt\n");
 }
 
-- 
2.18.0

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