leds: make PCI device id constant

From: Márton Németh <[email protected]>

The id_table field of the struct pci_driver is constant in <linux/pci.h> so it is worth to make pci_device_id also constant.

The semantic match that finds this kind of pattern is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r@
disable decl_init,const_decl_init;
identifier I1, I2, x;
@@

	struct I1 {
	  ...
	  const struct I2 *x;
	  ...
	};

@s@
identifier r.I1, y;
identifier r.x, E;
@@

	struct I1 y = {
	  .x = E,
	};

@c@
identifier r.I2;
identifier s.E;
@@

	const struct I2 E[] = ... ;

@depends on !c@
identifier r.I2;
identifier s.E;
@@
+ const

	struct I2 E[] = ...;

// </smpl>

---

diff -u -p a/drivers/leds/leds-ss4200.c b/drivers/leds/leds-ss4200.c
@@ -63,7 +63,7 @@ MODULE_LICENSE("GPL");
 /*
  * PCI ID of the Intel ICH7 LPC Device within which the GPIO block lives.
  */
-static struct pci_device_id ich7_lpc_pci_id[] =
+static const struct pci_device_id ich7_lpc_pci_id[] =
 {
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1) },

Queued in the LED tree, thanks.

Richard

Richard Purdie
Intel Open Source Technology Centre