From: Alex Elder <elder@linaro.org>
To: arnd@arndb.de, subashab@codeaurora.org, david.brown@linaro.org,
agross@kernel.org, davem@davemloft.net
Cc: bjorn.andersson@linaro.org, ilias.apalodimas@linaro.org,
cpratapa@codeaurora.org, syadagir@codeaurora.org,
evgreen@chromium.org, benchan@google.com, ejcaruso@google.com,
netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 1/8] net: qualcomm: rmnet: fix struct rmnet_map_header
Date: Mon, 20 May 2019 08:53:47 -0500 [thread overview]
Message-ID: <20190520135354.18628-2-elder@linaro.org> (raw)
In-Reply-To: <20190520135354.18628-1-elder@linaro.org>
The C bit-fields in the first byte of the rmnet_map_header structure
are defined in the wrong order. The first byte should be formatted
this way:
+------- reserved_bit
| +----- cd_bit
| |
v v
+-----------+-+-+
| pad_len |R|C|
+-----------+-+-+
7 6 5 4 3 2 1 0 <-- bit position
But the C bit-fields that define the first byte are defined this way:
u8 pad_len:6;
u8 reserved_bit:1;
u8 cd_bit:1;
And although this isn't portable, I can state that when I build it
the result puts the bit-fields in the wrong location (e.g., the
cd_bit is in bit position 7, when it should be position 0).
Fix this by reordering the definitions of these struct members.
Upcoming patches will reimplement these definitions portably.
Signed-off-by: Alex Elder <elder@linaro.org>
---
drivers/net/ethernet/qualcomm/rmnet/rmnet_map.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_map.h b/drivers/net/ethernet/qualcomm/rmnet/rmnet_map.h
index 884f1f52dcc2..b1ae9499c0b2 100644
--- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_map.h
+++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_map.h
@@ -40,9 +40,9 @@ enum rmnet_map_commands {
};
struct rmnet_map_header {
- u8 pad_len:6;
- u8 reserved_bit:1;
u8 cd_bit:1;
+ u8 reserved_bit:1;
+ u8 pad_len:6;
u8 mux_id;
__be16 pkt_len;
} __aligned(1);
--
2.20.1
next prev parent reply other threads:[~2019-05-20 13:54 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-20 13:53 [PATCH 0/8] net: introduce "include/linux/if_rmnet.h" Alex Elder
2019-05-20 13:53 ` Alex Elder [this message]
2019-05-20 15:38 ` [PATCH 1/8] net: qualcomm: rmnet: fix struct rmnet_map_header Bjorn Andersson
2019-05-20 20:11 ` Subash Abhinov Kasiviswanathan
2019-05-20 21:23 ` Alex Elder
2019-05-21 1:32 ` Subash Abhinov Kasiviswanathan
2019-05-21 2:30 ` Alex Elder
2019-05-21 3:07 ` Bjorn Andersson
2019-05-21 11:03 ` Alex Elder
2019-05-20 13:53 ` [PATCH 2/8] net: qualcomm: rmnet: kill RMNET_MAP_GET_*() accessor macros Alex Elder
2019-05-20 15:41 ` Bjorn Andersson
2019-05-20 13:53 ` [PATCH 3/8] net: qualcomm: rmnet: use field masks instead of C bit-fields Alex Elder
2019-05-20 15:43 ` Bjorn Andersson
2019-05-20 13:53 ` [PATCH 4/8] net: qualcomm: rmnet: don't use C bit-fields in rmnet checksum header Alex Elder
2019-05-20 15:49 ` Bjorn Andersson
2019-05-20 13:53 ` [PATCH 5/8] net: qualcomm: rmnet: don't use C bit-fields in rmnet checksum trailer Alex Elder
2019-05-20 17:17 ` Bjorn Andersson
2019-05-20 13:53 ` [PATCH 6/8] net: qualcomm: rmnet: get rid of a variable in rmnet_map_ipv4_ul_csum_header() Alex Elder
2019-05-20 17:17 ` Bjorn Andersson
2019-05-20 13:53 ` [PATCH 7/8] net: qualcomm: rmnet: mark endianness of struct rmnet_map_dl_csum_trailer fields Alex Elder
2019-05-20 17:17 ` Bjorn Andersson
2019-05-20 13:53 ` [PATCH 8/8] net: introduce "include/linux/if_rmnet.h" Alex Elder
2019-05-20 17:18 ` Bjorn Andersson
2019-05-20 18:00 ` [PATCH 0/8] " Alex Elder
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