[PATCH 3/8] sfc: Fix DMA mapping cleanup in case of an error in TSO
From: Ben Hutchings <hidden>
Date: 2009-12-23 23:47:16
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Neil Turton <redacted> We need buffer->len to remain valid to work out the correct address to be unmapped. We therefore need to clear buffer->len after the unmap operation. Signed-off-by: Ben Hutchings <redacted> --- drivers/net/sfc/tx.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/sfc/tx.c b/drivers/net/sfc/tx.c
index e669f94..a8b70ef 100644
--- a/drivers/net/sfc/tx.c
+++ b/drivers/net/sfc/tx.c@@ -821,8 +821,6 @@ static void efx_enqueue_unwind(struct efx_tx_queue *tx_queue) EFX_TXQ_MASK]; efx_tsoh_free(tx_queue, buffer); EFX_BUG_ON_PARANOID(buffer->skb); - buffer->len = 0; - buffer->continuation = true; if (buffer->unmap_len) { unmap_addr = (buffer->dma_addr + buffer->len - buffer->unmap_len);
@@ -836,6 +834,8 @@ static void efx_enqueue_unwind(struct efx_tx_queue *tx_queue) PCI_DMA_TODEVICE); buffer->unmap_len = 0; } + buffer->len = 0; + buffer->continuation = true; } }
--
1.5.5
--
Ben Hutchings, Senior Software Engineer, Solarflare Communications
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