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
WARNING: multiple messages have this Message-ID (diff)
From: Alex Elder <elder@linaro.org> To: arnd@arndb.de, subashab@codeaurora.org, david.brown@linaro.org, agross@kernel.org, davem@davemloft.net Cc: syadagir@codeaurora.org, ejcaruso@google.com, netdev@vger.kernel.org, ilias.apalodimas@linaro.org, linux-kernel@vger.kernel.org, evgreen@chromium.org, bjorn.andersson@linaro.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, cpratapa@codeaurora.org, benchan@google.com 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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-05-20 13:54 UTC|newest] Thread overview: 48+ 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 2019-05-20 13:53 ` Alex Elder [this message] 2019-05-20 13:53 ` [PATCH 1/8] net: qualcomm: rmnet: fix struct rmnet_map_header Alex Elder 2019-05-20 15:38 ` Bjorn Andersson 2019-05-20 15:38 ` Bjorn Andersson 2019-05-20 20:11 ` Subash Abhinov Kasiviswanathan 2019-05-20 20:11 ` Subash Abhinov Kasiviswanathan 2019-05-20 21:23 ` Alex Elder 2019-05-20 21:23 ` Alex Elder 2019-05-21 1:32 ` Subash Abhinov Kasiviswanathan 2019-05-21 1:32 ` Subash Abhinov Kasiviswanathan 2019-05-21 2:30 ` Alex Elder 2019-05-21 2:30 ` Alex Elder 2019-05-21 3:07 ` Bjorn Andersson 2019-05-21 3:07 ` Bjorn Andersson 2019-05-21 11:03 ` Alex Elder 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 13:53 ` Alex Elder 2019-05-20 15:41 ` Bjorn Andersson 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 13:53 ` Alex Elder 2019-05-20 15:43 ` Bjorn Andersson 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 13:53 ` Alex Elder 2019-05-20 15:49 ` Bjorn Andersson 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 13:53 ` Alex Elder 2019-05-20 17:17 ` Bjorn Andersson 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 13:53 ` Alex Elder 2019-05-20 17:17 ` Bjorn Andersson 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 13:53 ` Alex Elder 2019-05-20 17:17 ` Bjorn Andersson 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 13:53 ` Alex Elder 2019-05-20 17:18 ` Bjorn Andersson 2019-05-20 17:18 ` Bjorn Andersson 2019-05-20 18:00 ` [PATCH 0/8] " Alex Elder 2019-05-20 18:00 ` Alex Elder
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