This is a note to let you know that I've just added the patch titled
staging: fsl-dpaa2/eth: Fix access to FAS field
to the 4.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
staging-fsl-dpaa2-eth-fix-access-to-fas-field.patch
and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Fri Mar 16 15:11:08 CET 2018
From: Ioana Radulescu <ruxandra.radulescu@xxxxxxx>
Date: Fri, 8 Dec 2017 06:47:53 -0600
Subject: staging: fsl-dpaa2/eth: Fix access to FAS field
From: Ioana Radulescu <ruxandra.radulescu@xxxxxxx>
[ Upstream commit 54ce891779888e85a2db04942dbaadd3f40fe223 ]
Commit 4b2d9fe87950 ("staging: fsl-dpaa2/eth: Extra headroom in RX
buffers") removes the software annotation (SWA) area from the RX
buffer layout, as it's not used by anyone, but fails to update the
macros for accessing hardware annotation (HWA) fields, which is
right after the SWA in the buffer headroom.
This may lead to some frame annotation status fields (e.g. indication
if L3/L4 checksum is valid) to be read incorrectly.
Turn the accessor macros into inline functions and add a bool param
to specify if SWA is present or not.
Fixes: 4b2d9fe87950 ("staging: fsl-dpaa2/eth: Extra headroom in RX buffers")
Signed-off-by: Ioana Radulescu <ruxandra.radulescu@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c | 8 ++++----
drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.h | 13 +++++++++----
2 files changed, 13 insertions(+), 8 deletions(-)
--- a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
+++ b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
@@ -249,7 +249,7 @@ static void dpaa2_eth_rx(struct dpaa2_et
vaddr = dpaa2_iova_to_virt(priv->iommu_domain, addr);
dma_unmap_single(dev, addr, DPAA2_ETH_RX_BUF_SIZE, DMA_FROM_DEVICE);
- fas = dpaa2_get_fas(vaddr);
+ fas = dpaa2_get_fas(vaddr, false);
prefetch(fas);
buf_data = vaddr + dpaa2_fd_get_offset(fd);
prefetch(buf_data);
@@ -385,7 +385,7 @@ static int build_sg_fd(struct dpaa2_eth_
* on TX confirmation. We are clearing FAS (Frame Annotation Status)
* field from the hardware annotation area
*/
- fas = dpaa2_get_fas(sgt_buf);
+ fas = dpaa2_get_fas(sgt_buf, true);
memset(fas, 0, DPAA2_FAS_SIZE);
sgt = (struct dpaa2_sg_entry *)(sgt_buf + priv->tx_data_offset);
@@ -458,7 +458,7 @@ static int build_single_fd(struct dpaa2_
* on TX confirmation. We are clearing FAS (Frame Annotation Status)
* field from the hardware annotation area
*/
- fas = dpaa2_get_fas(buffer_start);
+ fas = dpaa2_get_fas(buffer_start, true);
memset(fas, 0, DPAA2_FAS_SIZE);
/* Store a backpointer to the skb at the beginning of the buffer
@@ -510,7 +510,7 @@ static void free_tx_fd(const struct dpaa
fd_addr = dpaa2_fd_get_addr(fd);
skbh = dpaa2_iova_to_virt(priv->iommu_domain, fd_addr);
- fas = dpaa2_get_fas(skbh);
+ fas = dpaa2_get_fas(skbh, true);
if (fd_format == dpaa2_fd_single) {
skb = *skbh;
--- a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.h
+++ b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.h
@@ -153,10 +153,15 @@ struct dpaa2_fas {
#define DPAA2_FAS_SIZE (sizeof(struct dpaa2_fas))
/* Accessors for the hardware annotation fields that we use */
-#define dpaa2_get_hwa(buf_addr) \
- ((void *)(buf_addr) + DPAA2_ETH_SWA_SIZE)
-#define dpaa2_get_fas(buf_addr) \
- (struct dpaa2_fas *)(dpaa2_get_hwa(buf_addr) + DPAA2_FAS_OFFSET)
+static inline void *dpaa2_get_hwa(void *buf_addr, bool swa)
+{
+ return buf_addr + (swa ? DPAA2_ETH_SWA_SIZE : 0);
+}
+
+static inline struct dpaa2_fas *dpaa2_get_fas(void *buf_addr, bool swa)
+{
+ return dpaa2_get_hwa(buf_addr, swa) + DPAA2_FAS_OFFSET;
+}
/* Error and status bits in the frame annotation status word */
/* Debug frame, otherwise supposed to be discarded */
Patches currently in stable-queue which might be from ruxandra.radulescu@xxxxxxx are
queue-4.15/staging-fsl-dpaa2-eth-fix-access-to-fas-field.patch