Staging: sxg: Fix memory leak caused by double allocation of rings

* The receive rings were getting allocated twice. Once at probe time
  and once at open time. This leaked huge amounts of memory.
  Fix this leak and now allocation is done only once.
Signed-off-by: LinSysSoft Sahara Team <saharaproj@linsyssoft.com>
Signed-off-by: Mithlesh Thukral <mithlesh@linsyssoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/sxg/sxg.c

@@ -613,8 +613,7 @@ static bool sxg_download_microcode(struct adapter_t *adapter,
  */
 static int sxg_allocate_resources(struct adapter_t *adapter)
 {
-	int status;
-	u32 i;
+	int status = STATUS_SUCCESS;
 	u32 RssIds, IsrCount;
 	/* struct sxg_xmt_ring	*XmtRing; */
 	/* struct sxg_rcv_ring	*RcvRing; */
@@ -736,30 +735,6 @@ static int sxg_allocate_resources(struct adapter_t *adapter)
 	ASSERT(sizeof(struct sxg_rcv_descriptor_block) ==
 	       SXG_RCV_DESCRIPTOR_BLOCK_SIZE);
 
-	/*
-	 * Allocate receive data buffers.  We allocate a block of buffers and
-	 * a corresponding descriptor block at once.  See sxghw.h:SXG_RCV_BLOCK
-	 */
-	for (i = 0; i < SXG_INITIAL_RCV_DATA_BUFFERS;
-				i += SXG_RCV_DESCRIPTORS_PER_BLOCK) {
-			status = sxg_allocate_buffer_memory(adapter,
-				SXG_RCV_BLOCK_SIZE(SXG_RCV_DATA_HDR_SIZE),
-					   SXG_BUFFER_TYPE_RCV);
-			if (status != STATUS_SUCCESS)
-				return status;
-	}
-	/*
-	 * NBL resource allocation can fail in the 'AllocateComplete' routine,
-	 * which doesn't return status.  Make sure we got the number of buffers
-	 * we requested
-	 */
-	if (adapter->FreeRcvBufferCount < SXG_INITIAL_RCV_DATA_BUFFERS) {
-		SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XAResF6",
-			  adapter, adapter->FreeRcvBufferCount, SXG_MAX_ENTRIES,
-			  0);
-		return (STATUS_RESOURCES);
-	}
-
 	DBG_ERROR("%s Allocate EventRings size[%x]\n", __func__,
 		  (unsigned int)(sizeof(struct sxg_event_ring) * RssIds));