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| author | Antoine Tenart <antoine.tenart@free-electrons.com> | 2017-11-28 14:19:48 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-11-28 16:09:50 +0100 |
| commit | ba2d8d887d962c2f790e6dc01b2fd25b4608720b (patch) | |
| tree | 8d64dacb5b60e2332c6c9679ba8a9bb1785f01d3 /drivers | |
| parent | Merge branch 'mlxsw-GRE-offloading-fixes' (diff) | |
| download | linux-ba2d8d887d962c2f790e6dc01b2fd25b4608720b.tar.xz linux-ba2d8d887d962c2f790e6dc01b2fd25b4608720b.zip | |
net: mvpp2: fix the txq_init error path
When an allocation in the txq_init path fails, the allocated buffers
end-up being freed twice: in the txq_init error path, and in txq_deinit.
This lead to issues as txq_deinit would work on already freed memory
regions:
kernel BUG at mm/slub.c:3915!
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
This patch fixes this by removing the txq_init own error path, as the
txq_deinit function is always called on errors. This was introduced by
TSO as way more buffers are allocated.
Fixes: 186cd4d4e414 ("net: mvpp2: software tso support")
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/marvell/mvpp2.c | 20 |
1 files changed, 2 insertions, 18 deletions
diff --git a/drivers/net/ethernet/marvell/mvpp2.c b/drivers/net/ethernet/marvell/mvpp2.c index 6c20e811f973..79f01cd80dd7 100644 --- a/drivers/net/ethernet/marvell/mvpp2.c +++ b/drivers/net/ethernet/marvell/mvpp2.c @@ -5805,7 +5805,7 @@ static int mvpp2_txq_init(struct mvpp2_port *port, sizeof(*txq_pcpu->buffs), GFP_KERNEL); if (!txq_pcpu->buffs) - goto cleanup; + return -ENOMEM; txq_pcpu->count = 0; txq_pcpu->reserved_num = 0; @@ -5821,26 +5821,10 @@ static int mvpp2_txq_init(struct mvpp2_port *port, &txq_pcpu->tso_headers_dma, GFP_KERNEL); if (!txq_pcpu->tso_headers) - goto cleanup; + return -ENOMEM; } return 0; -cleanup: - for_each_present_cpu(cpu) { - txq_pcpu = per_cpu_ptr(txq->pcpu, cpu); - kfree(txq_pcpu->buffs); - - dma_free_coherent(port->dev->dev.parent, - txq_pcpu->size * TSO_HEADER_SIZE, - txq_pcpu->tso_headers, - txq_pcpu->tso_headers_dma); - } - - dma_free_coherent(port->dev->dev.parent, - txq->size * MVPP2_DESC_ALIGNED_SIZE, - txq->descs, txq->descs_dma); - - return -ENOMEM; } /* Free allocated TXQ resources */ |