gru: fixes to grudump utility

Minor fixes to the SGI GRU grudump facility:
	- fix address where user data is written
	- add gru number to data passed to user
	- indicate if context is locked

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/misc/sgi-gru/grukdump.c

@@ -26,7 +26,7 @@
 
 static int gru_user_copy_handle(void __user **dp, void *s)
 {
-	if (copy_to_user(dp, s, GRU_HANDLE_BYTES))
+	if (copy_to_user(*dp, s, GRU_HANDLE_BYTES))
 		return -1;
 	*dp += GRU_HANDLE_BYTES;
 	return 0;
@@ -109,7 +109,7 @@ static int gru_dump_context(struct gru_state *gru, int ctxnum,
 {
 	struct gru_dump_context_header hdr;
 	struct gru_dump_context_header __user *uhdr = ubuf;
-	struct gru_context_configuration_handle *cch;
+	struct gru_context_configuration_handle *cch, *ubufcch;
 	struct gru_thread_state *gts;
 	int try, cch_locked, cbrcnt = 0, dsrcnt = 0, bytes = 0, ret = 0;
 	void *grubase;
@@ -125,8 +125,11 @@ static int gru_dump_context(struct gru_state *gru, int ctxnum,
 	}
 
 	ubuf += sizeof(hdr);
+	ubufcch = ubuf;
 	if (gru_user_copy_handle(&ubuf, cch))
 		goto fail;
+	if (cch_locked)
+		ubufcch->delresp = 0;
 	bytes = sizeof(hdr) + GRU_CACHE_LINE_BYTES;
 
 	if (cch_locked || !lock_cch) {
@@ -155,6 +158,7 @@ static int gru_dump_context(struct gru_state *gru, int ctxnum,
 		return ret;
 
 	hdr.magic = GRU_DUMP_MAGIC;
+	hdr.gid = gru->gs_gid;
 	hdr.ctxnum = ctxnum;
 	hdr.cbrcnt = cbrcnt;
 	hdr.dsrcnt = dsrcnt;

drivers/misc/sgi-gru/grulib.h

@@ -120,7 +120,7 @@ struct gru_flush_tlb_req {
 enum {dcs_pid, dcs_gid};
 struct gru_dump_chiplet_state_req {
 	unsigned int	op;
-	int		gid;
+	unsigned int	gid;
 	int		ctxnum;
 	char		data_opt;
 	char		lock_cch;
@@ -134,7 +134,7 @@ struct gru_dump_chiplet_state_req {
 #define GRU_DUMP_MAGIC	0x3474ab6c
 struct gru_dump_context_header {
 	unsigned int	magic;
-	unsigned char	gid;
+	unsigned int	gid;
 	unsigned char	ctxnum;
 	unsigned char	cbrcnt;
 	unsigned char	dsrcnt;