[PATCH, trivial] PNP: Use constant PNP_ID_LEN instead of literalnumber

[Witold Szczeponik]

The attached patch uses the constant PNP_ID_LEN instead of using a 
literal number for the length of a PNP ID in the scope of PNP quirks.

As a consequence, all IDs used in PNP quirks (c.f. "drivers/pnp/quirks.c") 
are now zero-terminated and standard functions that depend on the IDs 
to be zero-terminated now work reliably (c.f. "strlen" in "drivers/pnp/driver.c", 
function "compare_pnp_id"). 


The patch is applied against 3.1. 


Signed-off-by: Witold Szczeponik <Witold.Szczeponik@xxxxxxx>



Index: linux/include/linux/pnp.h
===================================================================
--- linux.orig/include/linux/pnp.h
+++ linux/include/linux/pnp.h
@@ -295,7 +295,7 @@ static inline void pnp_set_drvdata(struc
 }
 
 struct pnp_fixup {
-	char id[7];
+	char id[PNP_ID_LEN];
 	void (*quirk_function) (struct pnp_dev * dev);	/* fixup function */
 };
 

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