V4L/DVB (6247): Fix bug #8689: Fixes IR stop/start during suspend/resume

IR workqueue should be disabled during suspend. This avoids some troubles, like
the one reported on bug #8689:

"The Hauppauge HVR 1100 ir-remote control does not work after resume from
suspend to ram or disk."

This patch disables IR before suspending, re-enabling it after resume.

Thanks to Peter Poklop <Peter.Poklop@gmx.at> for reporting it and helping with
the fix.
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Reviewed-by: Peter Poklop <Peter.Poklop@gmx.at>

drivers/media/video/cx88/cx88-core.c

@@ -1084,6 +1084,9 @@ EXPORT_SYMBOL(cx88_vdev_init);
 EXPORT_SYMBOL(cx88_core_get);
 EXPORT_SYMBOL(cx88_core_put);
 
+EXPORT_SYMBOL(cx88_ir_start);
+EXPORT_SYMBOL(cx88_ir_stop);
+
 /*
  * Local variables:
  * c-basic-offset: 8

drivers/media/video/cx88/cx88-input.c

@@ -158,7 +158,7 @@ static void cx88_ir_work(struct work_struct *work)
 	mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling));
 }
 
-static void cx88_ir_start(struct cx88_core *core, struct cx88_IR *ir)
+void cx88_ir_start(struct cx88_core *core, struct cx88_IR *ir)
 {
 	if (ir->polling) {
 		setup_timer(&ir->timer, ir_timer, (unsigned long)ir);
@@ -172,7 +172,7 @@ static void cx88_ir_start(struct cx88_core *core, struct cx88_IR *ir)
 	}
 }
 
-static void cx88_ir_stop(struct cx88_core *core, struct cx88_IR *ir)
+void cx88_ir_stop(struct cx88_core *core, struct cx88_IR *ir)
 {
 	if (ir->sampling) {
 		cx_write(MO_DDSCFG_IO, 0x0);

drivers/media/video/cx88/cx88-video.c

@@ -1954,6 +1954,8 @@ static int cx8800_suspend(struct pci_dev *pci_dev, pm_message_t state)
 	}
 	spin_unlock(&dev->slock);
 
+	if (core->ir)
+		cx88_ir_stop(core, core->ir);
 	/* FIXME -- shutdown device */
 	cx88_shutdown(core);
 
@@ -1993,6 +1995,10 @@ static int cx8800_resume(struct pci_dev *pci_dev)
 
 	/* FIXME: re-initialize hardware */
 	cx88_reset(core);
+	if (core->ir)
+		cx88_ir_start(core, core->ir);
+
+	cx_set(MO_PCI_INTMSK, core->pci_irqmask);
 
 	/* restart video+vbi capture */
 	spin_lock(&dev->slock);

drivers/media/video/cx88/cx88.h

@@ -614,6 +614,8 @@ struct cx8802_driver * cx8802_get_driver(struct cx8802_dev *dev, enum cx88_board
 int cx88_ir_init(struct cx88_core *core, struct pci_dev *pci);
 int cx88_ir_fini(struct cx88_core *core);
 void cx88_ir_irq(struct cx88_core *core);
+void cx88_ir_start(struct cx88_core *core, struct cx88_IR *ir);
+void cx88_ir_stop(struct cx88_core *core, struct cx88_IR *ir);
 
 /* ----------------------------------------------------------- */
 /* cx88-mpeg.c                                                 */