diff options
| author | Karicheri, Muralidharan <m-karicheri2@ti.com> | 2015-09-23 17:37:08 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-09-23 21:37:37 (GMT) |
| commit | e558b1fbf5f43da83f91a31e595a6d65e663b100 (patch) | |
| tree | 8bc401661d3acf3cf3ddd1d3afc74975d58e713d | |
| parent | 736532a0705ffc27c14f712fa2758a7f8b15e8b4 (diff) | |
| download | linux-e558b1fbf5f43da83f91a31e595a6d65e663b100.tar.xz | |
net: netcp: add error check to netcp_allocate_rx_buf()
Currently, if netcp_allocate_rx_buf() fails due no descriptors
in the rx free descriptor queue, inside the netcp_rxpool_refill() function
the iterative loop to fill buffers doesn't terminate right away. So modify
the netcp_allocate_rx_buf() to return an error code and use it break the
loop when there is error.
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/ti/netcp_core.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/net/ethernet/ti/netcp_core.c b/drivers/net/ethernet/ti/netcp_core.c index cf693de..97e2629 100644 --- a/drivers/net/ethernet/ti/netcp_core.c +++ b/drivers/net/ethernet/ti/netcp_core.c @@ -801,7 +801,7 @@ static void netcp_rxpool_free(struct netcp_intf *netcp) netcp->rx_pool = NULL; } -static void netcp_allocate_rx_buf(struct netcp_intf *netcp, int fdq) +static int netcp_allocate_rx_buf(struct netcp_intf *netcp, int fdq) { struct knav_dma_desc *hwdesc; unsigned int buf_len, dma_sz; @@ -815,7 +815,7 @@ static void netcp_allocate_rx_buf(struct netcp_intf *netcp, int fdq) hwdesc = knav_pool_desc_get(netcp->rx_pool); if (IS_ERR_OR_NULL(hwdesc)) { dev_dbg(netcp->ndev_dev, "out of rx pool desc\n"); - return; + return -ENOMEM; } if (likely(fdq == 0)) { @@ -867,25 +867,26 @@ static void netcp_allocate_rx_buf(struct netcp_intf *netcp, int fdq) knav_pool_desc_map(netcp->rx_pool, hwdesc, sizeof(*hwdesc), &dma, &dma_sz); knav_queue_push(netcp->rx_fdq[fdq], dma, sizeof(*hwdesc), 0); - return; + return 0; fail: knav_pool_desc_put(netcp->rx_pool, hwdesc); + return -ENOMEM; } /* Refill Rx FDQ with descriptors & attached buffers */ static void netcp_rxpool_refill(struct netcp_intf *netcp) { u32 fdq_deficit[KNAV_DMA_FDQ_PER_CHAN] = {0}; - int i; + int i, ret = 0; /* Calculate the FDQ deficit and refill */ for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_fdq[i]; i++) { fdq_deficit[i] = netcp->rx_queue_depths[i] - knav_queue_get_count(netcp->rx_fdq[i]); - while (fdq_deficit[i]--) - netcp_allocate_rx_buf(netcp, i); + while (fdq_deficit[i]-- && !ret) + ret = netcp_allocate_rx_buf(netcp, i); } /* end for fdqs */ } |