[PATCH-for-5.0 06/12] hw/openrisc/pic_cpu: Use qdev gpio rather than qemu_allocate_irqs()

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

From: Philippe Mathieu-Daudé <f4bug@amsat.org>

Coverity points out (CID 1421934) that we are leaking the
memory returned by qemu_allocate_irqs(). We can avoid this
leak by switching to using qdev_init_gpio_in(); the base
class finalize will free the irqs that this allocates under
the hood.

Patch created mechanically using spatch with this script
inspired from commit d6ef883d9d7:

  @@
  typedef qemu_irq;
  identifier irqs, handler;
  expression opaque, count, i;
  @@
  -   qemu_irq *irqs;
      ...
  -   irqs = qemu_allocate_irqs(handler, opaque, count);
  +   qdev_init_gpio_in(DEVICE(opaque), handler, count);
      <+...
  -   irqs[i]
  +   qdev_get_gpio_in(DEVICE(opaque), i)
      ...+>
  ?-  g_free(irqs);

Reported-by: Coverity (CID 1421934 Resource leak)
Inspired-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20200412212943.4117-4-f4bug@amsat.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 hw/openrisc/pic_cpu.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/hw/openrisc/pic_cpu.c b/hw/openrisc/pic_cpu.c
index 36f9350830..4b0c92f842 100644
--- a/hw/openrisc/pic_cpu.c
+++ b/hw/openrisc/pic_cpu.c
@@ -52,10 +52,9 @@ static void openrisc_pic_cpu_handler(void *opaque, int irq, int level)
 void cpu_openrisc_pic_init(OpenRISCCPU *cpu)
 {
     int i;
-    qemu_irq *qi;
-    qi = qemu_allocate_irqs(openrisc_pic_cpu_handler, cpu, NR_IRQS);
+    qdev_init_gpio_in(DEVICE(cpu), openrisc_pic_cpu_handler, NR_IRQS);
 
     for (i = 0; i < NR_IRQS; i++) {
-        cpu->env.irq[i] = qi[i];
+        cpu->env.irq[i] = qdev_get_gpio_in(DEVICE(cpu), i);
     }
 }
-- 
2.21.1