staging: et131x: fix allocation failures

We should check the ring allocations don't fail.
If we get a fail we need to clean up properly. The allocator assumes the
deallocator will be used on failure, but it isn't. Make sure the
right deallocator is always called and add a missing check against
fbr allocation failure.

[v2]: Correct check logic

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/et131x/et131x.c b/drivers/staging/et131x/et131x.c
index 6413500..cc600df 100644 (file)
--- a/drivers/staging/et131x/et131x.c
+++ b/drivers/staging/et131x/et131x.c
@@ -2124,7 +2124,11 @@ static int et131x_rx_dma_memory_alloc(struct et131x_adapter *adapter)
 
        /* Alloc memory for the lookup table */
        rx_ring->fbr[0] = kmalloc(sizeof(struct fbr_lookup), GFP_KERNEL);
+       if (rx_ring->fbr[0] == NULL)
+               return -ENOMEM;
        rx_ring->fbr[1] = kmalloc(sizeof(struct fbr_lookup), GFP_KERNEL);
+       if (rx_ring->fbr[1] == NULL)
+               return -ENOMEM;
 
        /* The first thing we will do is configure the sizes of the buffer
         * rings. These will change based on jumbo packet support.  Larger
@@ -2289,7 +2293,7 @@ static void et131x_rx_dma_memory_free(struct et131x_adapter *adapter)
        for (id = 0; id < NUM_FBRS; id++) {
                fbr = rx_ring->fbr[id];
 
-               if (!fbr->ring_virtaddr)
+               if (!fbr || !fbr->ring_virtaddr)
                        continue;
 
                /* First the packet memory */
@@ -3591,6 +3595,7 @@ static int et131x_adapter_memory_alloc(struct et131x_adapter *adapter)
        if (status) {
                dev_err(&adapter->pdev->dev,
                          "et131x_tx_dma_memory_alloc FAILED\n");
+               et131x_tx_dma_memory_free(adapter);
                return status;
        }
        /* Receive buffer memory allocation */
@@ -3598,7 +3603,7 @@ static int et131x_adapter_memory_alloc(struct et131x_adapter *adapter)
        if (status) {
                dev_err(&adapter->pdev->dev,
                          "et131x_rx_dma_memory_alloc FAILED\n");
-               et131x_tx_dma_memory_free(adapter);
+               et131x_adapter_memory_free(adapter);
                return status;
        }