[PATCH 1/2] hw/sparc: Make grlib-irqmp device handle its own inbound IRQ lines

[Peter Maydell]

Currently the GRLIB_IRQMP device is used in one place (the leon3 board),
but instead of the device providing inbound gpio lines for the board
to wire up, the board code itself calls qemu_allocate_irqs() with
the handler function being a set_irq function defined in the code
for the device.

Refactor this into the standard setup of a device having input
gpio lines.

This fixes a trivial Coverity memory leak report (the leon3
board code leaks the IRQ array returned from qemu_allocate_irqs()).

Fixes: Coverity CID 1421922
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 include/hw/sparc/grlib.h |  2 --
 hw/intc/grlib_irqmp.c    |  5 ++++-
 hw/sparc/leon3.c         | 21 +++++++++------------
 3 files changed, 13 insertions(+), 15 deletions(-)

diff --git a/include/hw/sparc/grlib.h b/include/hw/sparc/grlib.h
index 78b6178fcd8..e1d1beaa73f 100644
--- a/include/hw/sparc/grlib.h
+++ b/include/hw/sparc/grlib.h
@@ -36,8 +36,6 @@
 
 typedef void (*set_pil_in_fn) (void *opaque, uint32_t pil_in);
 
-void grlib_irqmp_set_irq(void *opaque, int irq, int level);
-
 void grlib_irqmp_ack(DeviceState *dev, int intno);
 
 /* GPTimer */
diff --git a/hw/intc/grlib_irqmp.c b/hw/intc/grlib_irqmp.c
index ffec4a07eec..984334fa7bf 100644
--- a/hw/intc/grlib_irqmp.c
+++ b/hw/intc/grlib_irqmp.c
@@ -51,6 +51,8 @@
 #define FORCE_OFFSET     0x80
 #define EXTENDED_OFFSET  0xC0
 
+#define MAX_PILS 16
+
 OBJECT_DECLARE_SIMPLE_TYPE(IRQMP, GRLIB_IRQMP)
 
 typedef struct IRQMPState IRQMPState;
@@ -126,7 +128,7 @@ void grlib_irqmp_ack(DeviceState *dev, int intno)
     grlib_irqmp_ack_mask(state, mask);
 }
 
-void grlib_irqmp_set_irq(void *opaque, int irq, int level)
+static void grlib_irqmp_set_irq(void *opaque, int irq, int level)
 {
     IRQMP      *irqmp = GRLIB_IRQMP(opaque);
     IRQMPState *s;
@@ -328,6 +330,7 @@ static void grlib_irqmp_init(Object *obj)
     IRQMP *irqmp = GRLIB_IRQMP(obj);
     SysBusDevice *dev = SYS_BUS_DEVICE(obj);
 
+    qdev_init_gpio_in(DEVICE(obj), grlib_irqmp_set_irq, MAX_PILS);
     qdev_init_gpio_out_named(DEVICE(obj), &irqmp->irq, "grlib-irq", 1);
     memory_region_init_io(&irqmp->iomem, obj, &grlib_irqmp_ops, irqmp,
                           "irqmp", IRQMP_REG_SIZE);
diff --git a/hw/sparc/leon3.c b/hw/sparc/leon3.c
index 4bc4ebea841..7e16eea9e67 100644
--- a/hw/sparc/leon3.c
+++ b/hw/sparc/leon3.c
@@ -52,8 +52,6 @@
 #define LEON3_PROM_OFFSET    (0x00000000)
 #define LEON3_RAM_OFFSET     (0x40000000)
 
-#define MAX_PILS 16
-
 #define LEON3_UART_OFFSET  (0x80000100)
 #define LEON3_UART_IRQ     (3)
 
@@ -194,11 +192,10 @@ static void leon3_generic_hw_init(MachineState *machine)
     MemoryRegion *prom = g_new(MemoryRegion, 1);
     int         ret;
     char       *filename;
-    qemu_irq   *cpu_irqs = NULL;
     int         bios_size;
     int         prom_size;
     ResetData  *reset_info;
-    DeviceState *dev;
+    DeviceState *dev, *irqmpdev;
     int i;
     AHBPnp *ahb_pnp;
     APBPnp *apb_pnp;
@@ -230,16 +227,15 @@ static void leon3_generic_hw_init(MachineState *machine)
                             GRLIB_AHB_SLAVE, GRLIB_AHBMEM_AREA);
 
     /* Allocate IRQ manager */
-    dev = qdev_new(TYPE_GRLIB_IRQMP);
+    irqmpdev = qdev_new(TYPE_GRLIB_IRQMP);
     qdev_init_gpio_in_named_with_opaque(DEVICE(cpu), leon3_set_pil_in,
                                         env, "pil", 1);
-    qdev_connect_gpio_out_named(dev, "grlib-irq", 0,
+    qdev_connect_gpio_out_named(irqmpdev, "grlib-irq", 0,
                                 qdev_get_gpio_in_named(DEVICE(cpu), "pil", 0));
-    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
-    sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, LEON3_IRQMP_OFFSET);
-    env->irq_manager = dev;
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(irqmpdev), &error_fatal);
+    sysbus_mmio_map(SYS_BUS_DEVICE(irqmpdev), 0, LEON3_IRQMP_OFFSET);
+    env->irq_manager = irqmpdev;
     env->qemu_irq_ack = leon3_irq_manager;
-    cpu_irqs = qemu_allocate_irqs(grlib_irqmp_set_irq, dev, MAX_PILS);
     grlib_apb_pnp_add_entry(apb_pnp, LEON3_IRQMP_OFFSET, 0xFFF,
                             GRLIB_VENDOR_GAISLER, GRLIB_IRQMP_DEV,
                             2, 0, GRLIB_APBIO_AREA);
@@ -330,7 +326,7 @@ static void leon3_generic_hw_init(MachineState *machine)
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, LEON3_TIMER_OFFSET);
     for (i = 0; i < LEON3_TIMER_COUNT; i++) {
         sysbus_connect_irq(SYS_BUS_DEVICE(dev), i,
-                           cpu_irqs[LEON3_TIMER_IRQ + i]);
+                           qdev_get_gpio_in(irqmpdev, LEON3_TIMER_IRQ + i));
     }
 
     grlib_apb_pnp_add_entry(apb_pnp, LEON3_TIMER_OFFSET, 0xFFF,
@@ -342,7 +338,8 @@ static void leon3_generic_hw_init(MachineState *machine)
     qdev_prop_set_chr(dev, "chrdev", serial_hd(0));
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, LEON3_UART_OFFSET);
-    sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, cpu_irqs[LEON3_UART_IRQ]);
+    sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0,
+                       qdev_get_gpio_in(irqmpdev, LEON3_UART_IRQ));
     grlib_apb_pnp_add_entry(apb_pnp, LEON3_UART_OFFSET, 0xFFF,
                             GRLIB_VENDOR_GAISLER, GRLIB_APBUART_DEV, 1,
                             LEON3_UART_IRQ, GRLIB_APBIO_AREA);
-- 
2.20.1