broadcom-wl: fix memory corruption and leakage on remove (patch from #9576 by George Kashperko)

SVN-Revision: 27348

package/broadcom-wl/patches/006-fix-mem-leak-on-unload.patch

@@ -0,0 +1,31 @@
+From: George Kashperko <george@znau.edu.ua>
+
+Release nvram variables buffer.
+Prevent block reserved by alloc_etherdev from being freed.
+Signed-off-by: George Kashperko <george@znau.edu.ua>
+---
+---
+--- a/driver/siutils.c
++++ b/driver/siutils.c
+@@ -647,7 +647,10 @@ si_detach(si_t *sih)
+ #if !defined(BCMBUSTYPE) || (BCMBUSTYPE == SI_BUS)
+ 	if (sii != &ksii)
+ #endif	/* !BCMBUSTYPE || (BCMBUSTYPE == SI_BUS) */
+-		MFREE(sii->osh, sii, sizeof(si_info_t));
++		do {
++			MFREE(sii->osh, sii, sizeof(si_info_t));
++			nvram_exit((void *)&(sii->pub));
++		} while (0);
+ }
+ 
+ void *
+--- a/driver/wl_linux.c
++++ b/driver/wl_linux.c
+@@ -1477,7 +1477,6 @@ wl_free_if(wl_info_t *wl, wl_if_t *wlif)
+ 		free_netdev(wlif->dev);
+ #endif
+ 	}
+-	MFREE(wl->osh, wlif, sizeof(wl_if_t));
+ }
+ 
+ #ifdef AP