diff mbox series

[net,3/3] dpaa2-eth: unmap the SGT buffer before accessing its contents

Message ID 20220522125251.444477-4-ioana.ciornei@nxp.com (mailing list archive)
State Accepted
Delegated to: Netdev Maintainers
Headers show
Series dpaa2-eth: software TSO fixes | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net
netdev/fixes_present success Fixes tag present in non-next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers success CCed 6 of 6 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 20 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Ioana Ciornei May 22, 2022, 12:52 p.m. UTC
DMA unmap the Scatter/Gather table before going through the array to
unmap and free each of the header and data chunks. This is so we do not
touch the data between the dma_map and dma_unmap calls.

Fixes: 3dc709e0cd47 ("dpaa2-eth: add support for software TSO")
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
---
 drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
index f1f140277184..cd9ec80522e7 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
@@ -1136,6 +1136,10 @@  static void dpaa2_eth_free_tx_fd(struct dpaa2_eth_priv *priv,
 			sgt = (struct dpaa2_sg_entry *)(buffer_start +
 							priv->tx_data_offset);
 
+			/* Unmap the SGT buffer */
+			dma_unmap_single(dev, fd_addr, swa->tso.sgt_size,
+					 DMA_BIDIRECTIONAL);
+
 			/* Unmap and free the header */
 			tso_hdr = dpaa2_iova_to_virt(priv->iommu_domain, dpaa2_sg_get_addr(sgt));
 			dma_unmap_single(dev, dpaa2_sg_get_addr(sgt), TSO_HEADER_SIZE,
@@ -1147,10 +1151,6 @@  static void dpaa2_eth_free_tx_fd(struct dpaa2_eth_priv *priv,
 				dma_unmap_single(dev, dpaa2_sg_get_addr(&sgt[i]),
 						 dpaa2_sg_get_len(&sgt[i]), DMA_TO_DEVICE);
 
-			/* Unmap the SGT buffer */
-			dma_unmap_single(dev, fd_addr, swa->tso.sgt_size,
-					 DMA_BIDIRECTIONAL);
-
 			if (!swa->tso.is_last_fd)
 				should_free_skb = 0;
 		} else {