diff options
Diffstat (limited to 'drivers/irqchip/irq-gic-common.c')
| -rw-r--r-- | drivers/irqchip/irq-gic-common.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/irqchip/irq-gic-common.c b/drivers/irqchip/irq-gic-common.c index 30017df5b54c..01e673c680cd 100644 --- a/drivers/irqchip/irq-gic-common.c +++ b/drivers/irqchip/irq-gic-common.c @@ -21,6 +21,8 @@ #include "irq-gic-common.h" +static DEFINE_RAW_SPINLOCK(irq_controller_lock); + static const struct gic_kvm_info *gic_kvm_info; const struct gic_kvm_info *gic_get_kvm_info(void) @@ -53,11 +55,13 @@ int gic_configure_irq(unsigned int irq, unsigned int type, u32 confoff = (irq / 16) * 4; u32 val, oldval; int ret = 0; + unsigned long flags; /* * Read current configuration register, and insert the config * for "irq", depending on "type". */ + raw_spin_lock_irqsave(&irq_controller_lock, flags); val = oldval = readl_relaxed(base + GIC_DIST_CONFIG + confoff); if (type & IRQ_TYPE_LEVEL_MASK) val &= ~confmask; @@ -65,8 +69,10 @@ int gic_configure_irq(unsigned int irq, unsigned int type, val |= confmask; /* If the current configuration is the same, then we are done */ - if (val == oldval) + if (val == oldval) { + raw_spin_unlock_irqrestore(&irq_controller_lock, flags); return 0; + } /* * Write back the new configuration, and possibly re-enable @@ -84,6 +90,7 @@ int gic_configure_irq(unsigned int irq, unsigned int type, pr_warn("GIC: PPI%d is secure or misconfigured\n", irq - 16); } + raw_spin_unlock_irqrestore(&irq_controller_lock, flags); if (sync_access) sync_access(); |