Commit 4cea749d authored by Marc Zyngier's avatar Marc Zyngier

Revert "irqchip/xilinx: Enable generic irq multi handler"

This reverts commit a0789993, which
breaks a number of PPC platforms.
Reported-by: default avatarStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/44b64be7-9240-fd52-af90-e0245220f38b@xilinx.com
parent e02f6c01
......@@ -47,8 +47,6 @@ config MICROBLAZE
select CPU_NO_EFFICIENT_FFS
select MMU_GATHER_NO_RANGE if MMU
select SPARSE_IRQ
select GENERIC_IRQ_MULTI_HANDLER
select HANDLE_DOMAIN_IRQ
# Endianness selection
choice
......
......@@ -14,4 +14,7 @@
struct pt_regs;
extern void do_IRQ(struct pt_regs *regs);
/* should be defined in each interrupt controller driver */
extern unsigned int xintc_get_irq(void);
#endif /* _ASM_MICROBLAZE_IRQ_H */
......@@ -20,10 +20,29 @@
#include <linux/irqchip.h>
#include <linux/of_irq.h>
static u32 concurrent_irq;
void __irq_entry do_IRQ(struct pt_regs *regs)
{
unsigned int irq;
struct pt_regs *old_regs = set_irq_regs(regs);
trace_hardirqs_off();
handle_arch_irq(regs);
irq_enter();
irq = xintc_get_irq();
next_irq:
BUG_ON(!irq);
generic_handle_irq(irq);
irq = xintc_get_irq();
if (irq != -1U) {
pr_debug("next irq: %d\n", irq);
++concurrent_irq;
goto next_irq;
}
irq_exit();
set_irq_regs(old_regs);
trace_hardirqs_on();
}
......
......@@ -124,6 +124,20 @@ static unsigned int xintc_get_irq_local(struct xintc_irq_chip *irqc)
return irq;
}
unsigned int xintc_get_irq(void)
{
unsigned int irq = -1;
u32 hwirq;
hwirq = xintc_read(primary_intc, IVR);
if (hwirq != -1U)
irq = irq_find_mapping(primary_intc->root_domain, hwirq);
pr_debug("irq-xilinx: hwirq=%d, irq=%d\n", hwirq, irq);
return irq;
}
static int xintc_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
{
struct xintc_irq_chip *irqc = d->host_data;
......@@ -163,25 +177,6 @@ static void xil_intc_irq_handler(struct irq_desc *desc)
chained_irq_exit(chip, desc);
}
static void xil_intc_handle_irq(struct pt_regs *regs)
{
u32 hwirq;
struct xintc_irq_chip *irqc = primary_intc;
do {
hwirq = xintc_read(irqc, IVR);
if (likely(hwirq != -1U)) {
int ret;
ret = handle_domain_irq(irqc->root_domain, hwirq, regs);
WARN_ONCE(ret, "Unhandled HWIRQ %d\n", hwirq);
continue;
}
break;
} while (1);
}
static int __init xilinx_intc_of_init(struct device_node *intc,
struct device_node *parent)
{
......@@ -251,7 +246,6 @@ static int __init xilinx_intc_of_init(struct device_node *intc,
} else {
primary_intc = irqc;
irq_set_default_host(primary_intc->root_domain);
set_handle_irq(xil_intc_handle_irq);
}
return 0;
......
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