[PATCH net 5/7] ibmvnic: set ltb->buff to NULL after freeing
From: Sukadev Bhattiprolu <hidden>
Date: 2021-06-24 04:16:00
Subsystem:
ibm power sriov virtual nic device driver, linux for powerpc (32-bit and 64-bit), networking drivers, the rest · Maintainers:
Haren Myneni, Rick Lindsley, Madhavan Srinivasan, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
free_long_term_buff() checks ltb->buff to decide whether we have a long
term buffer to free. So set ltb->buff to NULL afer freeing. While here,
also clear ->map_id, fix up some coding style and log an error.
Fixes: 9c4eaabd1bb39 ("Check CRQ command return codes")
Signed-off-by: Sukadev Bhattiprolu <redacted>
---
drivers/net/ethernet/ibm/ibmvnic.c | 26 +++++++++++++++-----------
1 file changed, 15 insertions(+), 11 deletions(-)
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index b1d7caaa4fb7..b56406ca90c0 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c@@ -234,12 +234,11 @@ static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, mutex_lock(&adapter->fw_lock); adapter->fw_done_rc = 0; reinit_completion(&adapter->fw_done); - rc = send_request_map(adapter, ltb->addr, - ltb->size, ltb->map_id); + + rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); if (rc) { - dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); - mutex_unlock(&adapter->fw_lock); - return rc; + dev_err(dev, "send_request_map failed, rc = %d\n", rc); + goto out; } rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
@@ -247,20 +246,23 @@ static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, dev_err(dev, "Long term map request aborted or timed out,rc = %d\n", rc); - dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); - mutex_unlock(&adapter->fw_lock); - return rc; + goto out; } if (adapter->fw_done_rc) { dev_err(dev, "Couldn't map long term buffer,rc = %d\n", adapter->fw_done_rc); + rc = -1; + goto out; + } + rc = 0; +out: + if (rc) { dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); - mutex_unlock(&adapter->fw_lock); - return -1; + ltb->buff = NULL; } mutex_unlock(&adapter->fw_lock); - return 0; + return rc; } static void free_long_term_buff(struct ibmvnic_adapter *adapter,
@@ -280,6 +282,8 @@ static void free_long_term_buff(struct ibmvnic_adapter *adapter, adapter->reset_reason != VNIC_RESET_TIMEOUT) send_request_unmap(adapter, ltb->map_id); dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); + ltb->buff = NULL; + ltb->map_id = 0; } static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
--
2.31.1