net/bnx2x: fix memory leak

[ upstream commit 68ed074 ]

We allocate DMA memory but never free after using it.
Add function to free DMA memory.

Fixes: b5bf771 ("bnx2x: driver support routines")

Signed-off-by: Shahed Shaikh <shshaikh@marvell.com>

drivers/net/bnx2x/bnx2x.c

@@ -185,13 +185,27 @@ bnx2x_dma_alloc(struct bnx2x_softc *sc, size_t size, struct bnx2x_dma *dma,
 	}
 	dma->paddr = (uint64_t) z->iova;
 	dma->vaddr = z->addr;
+	dma->mzone = (const void *)z;
 
 	PMD_DRV_LOG(DEBUG, sc,
 		    "%s: virt=%p phys=%" PRIx64, msg, dma->vaddr, dma->paddr);
 
 	return 0;
 }
 
+void bnx2x_dma_free(struct bnx2x_dma *dma)
+{
+	if (dma->mzone == NULL)
+		return;
+
+	rte_memzone_free((const struct rte_memzone *)dma->mzone);
+	dma->sc = NULL;
+	dma->paddr = 0;
+	dma->vaddr = NULL;
+	dma->nseg = 0;
+	dma->mzone = NULL;
+}
+
 static int bnx2x_acquire_hw_lock(struct bnx2x_softc *sc, uint32_t resource)
 {
 	uint32_t lock_status;
@@ -2436,6 +2450,7 @@ static int bnx2x_alloc_mem(struct bnx2x_softc *sc)
 
 static void bnx2x_free_fw_stats_mem(struct bnx2x_softc *sc)
 {
+	bnx2x_dma_free(&sc->fw_stats_dma);
 	sc->fw_stats_num = 0;
 
 	sc->fw_stats_req_size = 0;

drivers/net/bnx2x/bnx2x.h

@@ -319,6 +319,7 @@ struct bnx2x_dma {
 	rte_iova_t              paddr;
 	void                    *vaddr;
 	int                     nseg;
+	const void		*mzone;
 	char                    msg[RTE_MEMZONE_NAMESIZE - 6];
 };
 
@@ -1753,7 +1754,7 @@ int  bnx2x_cmpxchg(volatile int *addr, int old, int new);
 
 int bnx2x_dma_alloc(struct bnx2x_softc *sc, size_t size,
 		struct bnx2x_dma *dma, const char *msg, uint32_t align);
-
+void bnx2x_dma_free(struct bnx2x_dma *dma);
 uint32_t bnx2x_dmae_opcode_add_comp(uint32_t opcode, uint8_t comp_type);
 uint32_t bnx2x_dmae_opcode_clr_src_reset(uint32_t opcode);
 uint32_t bnx2x_dmae_opcode(struct bnx2x_softc *sc, uint8_t src_type,

drivers/net/bnx2x/ecore_sp.h

@@ -151,14 +151,15 @@ typedef rte_spinlock_t ECORE_MUTEX_SPIN;
 		}							\
 	} while (0)
 
-#define ECORE_ILT_FREE(x, y, size)                   \
-    do {                                             \
-	if (x) {                                     \
-	    rte_free(x);                             \
-	    x = NULL;                                \
-	    y = 0;                                   \
-	}                                            \
-    } while (0)
+#define ECORE_ILT_FREE(x, y, size)					\
+	do {								\
+		if (x) {						\
+			bnx2x_dma_free((struct bnx2x_dma *)x);		\
+			rte_free(x);					\
+			x = NULL;					\
+			y = 0;						\
+		}							\
+	} while (0)
 
 #define ECORE_IS_VALID_ETHER_ADDR(_mac) TRUE