fix false switching job_switched

anomal results reads due SPI error
alpet83 · Oct 4, 2013 · b78818b · b78818b
1 parent ee76be0
commit b78818b
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/libbitfury.c b/libbitfury.c
@@ -561,7 +561,11 @@ void libbitfury_sendHashData(struct thr_info *thr, struct bitfury_device *bf, in
 			memcpy(newbuf, spi_getrxbuf() + 4 + chip, 17*4);
 			tm_i2c_clear_oe(slot);
 
-			d->job_switched = (newbuf[16] != oldbuf[16]);
+			if ( 0 == newbuf[16] || 0 == !newbuf[16] )
+             		  d->job_switched = ( newbuf[16] != oldbuf[16]  );
+        		else
+            		  applog(LOG_WARNING, "Unexpected value in newbuf[16] == 0x%08x", newbuf[16]);
+
 
 			d->old_num = 0;
 			d->future_num = 0;