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-rw-r--r--drivers/irqchip/irq-gic-v3.c65
1 files changed, 31 insertions, 34 deletions
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 6232f98ef81b..8f87f40c9460 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -348,48 +348,45 @@ static asmlinkage void __exception_irq_entry gic_handle_irq(struct pt_regs *regs
{
u32 irqnr;
- do {
- irqnr = gic_read_iar();
+ irqnr = gic_read_iar();
- if (likely(irqnr > 15 && irqnr < 1020) || irqnr >= 8192) {
- int err;
+ if (likely(irqnr > 15 && irqnr < 1020) || irqnr >= 8192) {
+ int err;
- if (static_branch_likely(&supports_deactivate_key))
+ if (static_branch_likely(&supports_deactivate_key))
+ gic_write_eoir(irqnr);
+ else
+ isb();
+
+ err = handle_domain_irq(gic_data.domain, irqnr, regs);
+ if (err) {
+ WARN_ONCE(true, "Unexpected interrupt received!\n");
+ if (static_branch_likely(&supports_deactivate_key)) {
+ if (irqnr < 8192)
+ gic_write_dir(irqnr);
+ } else {
gic_write_eoir(irqnr);
- else
- isb();
-
- err = handle_domain_irq(gic_data.domain, irqnr, regs);
- if (err) {
- WARN_ONCE(true, "Unexpected interrupt received!\n");
- if (static_branch_likely(&supports_deactivate_key)) {
- if (irqnr < 8192)
- gic_write_dir(irqnr);
- } else {
- gic_write_eoir(irqnr);
- }
}
- continue;
}
- if (irqnr < 16) {
- gic_write_eoir(irqnr);
- if (static_branch_likely(&supports_deactivate_key))
- gic_write_dir(irqnr);
+ return;
+ }
+ if (irqnr < 16) {
+ gic_write_eoir(irqnr);
+ if (static_branch_likely(&supports_deactivate_key))
+ gic_write_dir(irqnr);
#ifdef CONFIG_SMP
- /*
- * Unlike GICv2, we don't need an smp_rmb() here.
- * The control dependency from gic_read_iar to
- * the ISB in gic_write_eoir is enough to ensure
- * that any shared data read by handle_IPI will
- * be read after the ACK.
- */
- handle_IPI(irqnr, regs);
+ /*
+ * Unlike GICv2, we don't need an smp_rmb() here.
+ * The control dependency from gic_read_iar to
+ * the ISB in gic_write_eoir is enough to ensure
+ * that any shared data read by handle_IPI will
+ * be read after the ACK.
+ */
+ handle_IPI(irqnr, regs);
#else
- WARN_ONCE(true, "Unexpected SGI received!\n");
+ WARN_ONCE(true, "Unexpected SGI received!\n");
#endif
- continue;
- }
- } while (irqnr != ICC_IAR1_EL1_SPURIOUS);
+ }
}
static void __init gic_dist_init(void)