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* [PATCH v4] Add payload to be 32-bit aligned to fix dropped packets
@ 2021-10-28  9:50 Kumar Thangavel
  2021-11-03 15:11 ` Kumar Thangavel
  0 siblings, 1 reply; 10+ messages in thread
From: Kumar Thangavel @ 2021-10-28  9:50 UTC (permalink / raw)
  To: linux-aspeed

Update NC-SI command handler (both standard and OEM) to take into
account of payload paddings in allocating skb (in case of payload
size is not 32-bit aligned).

The checksum field follows payload field, without taking payload
padding into account can cause checksum being truncated, leading to
dropped packets.

Signed-off-by: Kumar Thangavel <thangavel.k@hcl.com>
Acked-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>

---
  v4:
   - Updated existing macro for max function

  v3:
   - Added Macro for MAX
   - Fixed the missed semicolon

  v2:
   - Added NC-SI spec version and section
   - Removed blank line
   - corrected spellings

  v1:
   - Initial draft

---
 net/ncsi/ncsi-cmd.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/net/ncsi/ncsi-cmd.c b/net/ncsi/ncsi-cmd.c
index ba9ae482141b..e44fe138c20f 100644
--- a/net/ncsi/ncsi-cmd.c
+++ b/net/ncsi/ncsi-cmd.c
@@ -213,12 +213,16 @@ static int ncsi_cmd_handler_oem(struct sk_buff *skb,
 {
 	struct ncsi_cmd_oem_pkt *cmd;
 	unsigned int len;
+	/* NC-SI spec DSP_0222_1.2.0, section 8.2.2.2
+	 * requires payload to be padded with 0 to
+	 * 32-bit boundary before the checksum field.
+	 * Ensure the padding bytes are accounted for in
+	 * skb allocation
+	 */
 
+	unsigned short payload = ALIGN(nca->payload, 4);
 	len = sizeof(struct ncsi_cmd_pkt_hdr) + 4;
-	if (nca->payload < 26)
-		len += 26;
-	else
-		len += nca->payload;
+	len += max(payload, 26);
 
 	cmd = skb_put_zero(skb, len);
 	memcpy(&cmd->mfr_id, nca->data, nca->payload);
@@ -272,6 +276,7 @@ static struct ncsi_request *ncsi_alloc_command(struct ncsi_cmd_arg *nca)
 	struct net_device *dev = nd->dev;
 	int hlen = LL_RESERVED_SPACE(dev);
 	int tlen = dev->needed_tailroom;
+	int payload;
 	int len = hlen + tlen;
 	struct sk_buff *skb;
 	struct ncsi_request *nr;
@@ -281,14 +286,14 @@ static struct ncsi_request *ncsi_alloc_command(struct ncsi_cmd_arg *nca)
 		return NULL;
 
 	/* NCSI command packet has 16-bytes header, payload, 4 bytes checksum.
+	 * Payload needs padding so that the checksum field following payload is
+	 * aligned to 32-bit boundary.
 	 * The packet needs padding if its payload is less than 26 bytes to
 	 * meet 64 bytes minimal ethernet frame length.
 	 */
 	len += sizeof(struct ncsi_cmd_pkt_hdr) + 4;
-	if (nca->payload < 26)
-		len += 26;
-	else
-		len += nca->payload;
+	payload = ALIGN(nca->payload, 4);
+	len += max(payload, 26);
 
 	/* Allocate skb */
 	skb = alloc_skb(len, GFP_ATOMIC);
-- 
2.17.1


^ permalink raw reply related	[flat|nested] 10+ messages in thread

* [PATCH v4] Add payload to be 32-bit aligned to fix dropped packets
  2021-10-28  9:50 [PATCH v4] Add payload to be 32-bit aligned to fix dropped packets Kumar Thangavel
@ 2021-11-03 15:11 ` Kumar Thangavel
  2021-11-03 15:49   ` Jakub Kicinski
  0 siblings, 1 reply; 10+ messages in thread
From: Kumar Thangavel @ 2021-11-03 15:11 UTC (permalink / raw)
  To: linux-aspeed

Hi All,

    Could you please review the patch and provide your feedback?

Thanks,
Kumar.

On Thu, Oct 28, 2021 at 3:20 PM Kumar Thangavel <
kumarthangavel.hcl@gmail.com> wrote:

> Update NC-SI command handler (both standard and OEM) to take into
> account of payload paddings in allocating skb (in case of payload
> size is not 32-bit aligned).
>
> The checksum field follows payload field, without taking payload
> padding into account can cause checksum being truncated, leading to
> dropped packets.
>
> Signed-off-by: Kumar Thangavel <thangavel.k@hcl.com>
> Acked-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
> Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
>
> ---
>   v4:
>    - Updated existing macro for max function
>
>   v3:
>    - Added Macro for MAX
>    - Fixed the missed semicolon
>
>   v2:
>    - Added NC-SI spec version and section
>    - Removed blank line
>    - corrected spellings
>
>   v1:
>    - Initial draft
>
> ---
>  net/ncsi/ncsi-cmd.c | 21 +++++++++++++--------
>  1 file changed, 13 insertions(+), 8 deletions(-)
>
> diff --git a/net/ncsi/ncsi-cmd.c b/net/ncsi/ncsi-cmd.c
> index ba9ae482141b..e44fe138c20f 100644
> --- a/net/ncsi/ncsi-cmd.c
> +++ b/net/ncsi/ncsi-cmd.c
> @@ -213,12 +213,16 @@ static int ncsi_cmd_handler_oem(struct sk_buff *skb,
>  {
>         struct ncsi_cmd_oem_pkt *cmd;
>         unsigned int len;
> +       /* NC-SI spec DSP_0222_1.2.0, section 8.2.2.2
> +        * requires payload to be padded with 0 to
> +        * 32-bit boundary before the checksum field.
> +        * Ensure the padding bytes are accounted for in
> +        * skb allocation
> +        */
>
> +       unsigned short payload = ALIGN(nca->payload, 4);
>         len = sizeof(struct ncsi_cmd_pkt_hdr) + 4;
> -       if (nca->payload < 26)
> -               len += 26;
> -       else
> -               len += nca->payload;
> +       len += max(payload, 26);
>
>         cmd = skb_put_zero(skb, len);
>         memcpy(&cmd->mfr_id, nca->data, nca->payload);
> @@ -272,6 +276,7 @@ static struct ncsi_request *ncsi_alloc_command(struct
> ncsi_cmd_arg *nca)
>         struct net_device *dev = nd->dev;
>         int hlen = LL_RESERVED_SPACE(dev);
>         int tlen = dev->needed_tailroom;
> +       int payload;
>         int len = hlen + tlen;
>         struct sk_buff *skb;
>         struct ncsi_request *nr;
> @@ -281,14 +286,14 @@ static struct ncsi_request
> *ncsi_alloc_command(struct ncsi_cmd_arg *nca)
>                 return NULL;
>
>         /* NCSI command packet has 16-bytes header, payload, 4 bytes
> checksum.
> +        * Payload needs padding so that the checksum field following
> payload is
> +        * aligned to 32-bit boundary.
>          * The packet needs padding if its payload is less than 26 bytes to
>          * meet 64 bytes minimal ethernet frame length.
>          */
>         len += sizeof(struct ncsi_cmd_pkt_hdr) + 4;
> -       if (nca->payload < 26)
> -               len += 26;
> -       else
> -               len += nca->payload;
> +       payload = ALIGN(nca->payload, 4);
> +       len += max(payload, 26);
>
>         /* Allocate skb */
>         skb = alloc_skb(len, GFP_ATOMIC);
> --
> 2.17.1
>
>
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* [PATCH v4] Add payload to be 32-bit aligned to fix dropped packets
  2021-11-03 15:11 ` Kumar Thangavel
@ 2021-11-03 15:49   ` Jakub Kicinski
  2021-11-03 16:13     ` Kumar Thangavel
  0 siblings, 1 reply; 10+ messages in thread
From: Jakub Kicinski @ 2021-11-03 15:49 UTC (permalink / raw)
  To: linux-aspeed

On Wed, 3 Nov 2021 20:41:56 +0530 Kumar Thangavel wrote:
>     Could you please review the patch and provide your feedback?

You missed CCing netdev@ again. You need to CC the mailing list 
to get the patch considered for merging.

^ permalink raw reply	[flat|nested] 10+ messages in thread

* [PATCH v4] Add payload to be 32-bit aligned to fix dropped packets
  2021-11-03 15:49   ` Jakub Kicinski
@ 2021-11-03 16:13     ` Kumar Thangavel
  2021-11-03 16:16       ` Jakub Kicinski
  0 siblings, 1 reply; 10+ messages in thread
From: Kumar Thangavel @ 2021-11-03 16:13 UTC (permalink / raw)
  To: linux-aspeed

Hi Jakub,

Thanks for your response.

Somehow, My mails are not delivered to netdev at vger.kernel.org.

So, I removed it in my last 2 patchsets.

I will try again to CCing netdev at vger.kernel.org.

Thanks,
Kumar.



On Wed, Nov 3, 2021 at 9:19 PM Jakub Kicinski <kuba@kernel.org> wrote:

> On Wed, 3 Nov 2021 20:41:56 +0530 Kumar Thangavel wrote:
> >     Could you please review the patch and provide your feedback?
>
> You missed CCing netdev@ again. You need to CC the mailing list
> to get the patch considered for merging.
>
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* [PATCH v4] Add payload to be 32-bit aligned to fix dropped packets
  2021-11-03 16:13     ` Kumar Thangavel
@ 2021-11-03 16:16       ` Jakub Kicinski
  2021-11-03 16:37         ` Kumar Thangavel
  0 siblings, 1 reply; 10+ messages in thread
From: Jakub Kicinski @ 2021-11-03 16:16 UTC (permalink / raw)
  To: linux-aspeed

On Wed, 3 Nov 2021 21:43:03 +0530 Kumar Thangavel wrote:
> Hi Jakub,
> 
> Thanks for your response.
> 
> Somehow, My mails are not delivered to netdev at vger.kernel.org.
> 
> So, I removed it in my last 2 patchsets.
> 
> I will try again to CCing netdev at vger.kernel.org.

For normal replies you need to use plain text, not HTML. The mailing
list rejects HTML emails. But the patch should go thru, we'll see.

^ permalink raw reply	[flat|nested] 10+ messages in thread

* [PATCH v4] Add payload to be 32-bit aligned to fix dropped packets
  2021-11-03 16:16       ` Jakub Kicinski
@ 2021-11-03 16:37         ` Kumar Thangavel
  0 siblings, 0 replies; 10+ messages in thread
From: Kumar Thangavel @ 2021-11-03 16:37 UTC (permalink / raw)
  To: linux-aspeed

Ok Sure Jakub.

Thanks,
Kumar.

On Wed, Nov 3, 2021 at 9:46 PM Jakub Kicinski <kuba@kernel.org> wrote:

> On Wed, 3 Nov 2021 21:43:03 +0530 Kumar Thangavel wrote:
> > Hi Jakub,
> >
> > Thanks for your response.
> >
> > Somehow, My mails are not delivered to netdev at vger.kernel.org.
> >
> > So, I removed it in my last 2 patchsets.
> >
> > I will try again to CCing netdev at vger.kernel.org.
>
> For normal replies you need to use plain text, not HTML. The mailing
> list rejects HTML emails. But the patch should go thru, we'll see.
>
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* [PATCH v4] Add payload to be 32-bit aligned to fix dropped packets
@ 2021-11-10  9:54 Kumar Thangavel
  2021-11-10 13:58 ` Denis Kirjanov
                   ` (2 more replies)
  0 siblings, 3 replies; 10+ messages in thread
From: Kumar Thangavel @ 2021-11-10  9:54 UTC (permalink / raw)
  To: linux-aspeed

Update NC-SI command handler (both standard and OEM) to take into
account of payload paddings in allocating skb (in case of payload
size is not 32-bit aligned).

The checksum field follows payload field, without taking payload
padding into account can cause checksum being truncated, leading to
dropped packets.

Signed-off-by: Kumar Thangavel <thangavel.k@hcl.com>
Acked-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>

---
  v4:
   - Updated existing macro for max function

  v3:
   - Added Macro for MAX
   - Fixed the missed semicolon

  v2:
   - Added NC-SI spec version and section
   - Removed blank line
   - corrected spellings

  v1:
   - Initial draft

---
---
 net/ncsi/ncsi-cmd.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/net/ncsi/ncsi-cmd.c b/net/ncsi/ncsi-cmd.c
index ba9ae482141b..e44fe138c20f 100644
--- a/net/ncsi/ncsi-cmd.c
+++ b/net/ncsi/ncsi-cmd.c
@@ -213,12 +213,16 @@ static int ncsi_cmd_handler_oem(struct sk_buff *skb,
 {
 	struct ncsi_cmd_oem_pkt *cmd;
 	unsigned int len;
+	/* NC-SI spec DSP_0222_1.2.0, section 8.2.2.2
+	 * requires payload to be padded with 0 to
+	 * 32-bit boundary before the checksum field.
+	 * Ensure the padding bytes are accounted for in
+	 * skb allocation
+	 */
 
+	unsigned short payload = ALIGN(nca->payload, 4);
 	len = sizeof(struct ncsi_cmd_pkt_hdr) + 4;
-	if (nca->payload < 26)
-		len += 26;
-	else
-		len += nca->payload;
+	len += max(payload, 26);
 
 	cmd = skb_put_zero(skb, len);
 	memcpy(&cmd->mfr_id, nca->data, nca->payload);
@@ -272,6 +276,7 @@ static struct ncsi_request *ncsi_alloc_command(struct ncsi_cmd_arg *nca)
 	struct net_device *dev = nd->dev;
 	int hlen = LL_RESERVED_SPACE(dev);
 	int tlen = dev->needed_tailroom;
+	int payload;
 	int len = hlen + tlen;
 	struct sk_buff *skb;
 	struct ncsi_request *nr;
@@ -281,14 +286,14 @@ static struct ncsi_request *ncsi_alloc_command(struct ncsi_cmd_arg *nca)
 		return NULL;
 
 	/* NCSI command packet has 16-bytes header, payload, 4 bytes checksum.
+	 * Payload needs padding so that the checksum field following payload is
+	 * aligned to 32-bit boundary.
 	 * The packet needs padding if its payload is less than 26 bytes to
 	 * meet 64 bytes minimal ethernet frame length.
 	 */
 	len += sizeof(struct ncsi_cmd_pkt_hdr) + 4;
-	if (nca->payload < 26)
-		len += 26;
-	else
-		len += nca->payload;
+	payload = ALIGN(nca->payload, 4);
+	len += max(payload, 26);
 
 	/* Allocate skb */
 	skb = alloc_skb(len, GFP_ATOMIC);
-- 
2.17.1


^ permalink raw reply related	[flat|nested] 10+ messages in thread

* [PATCH v4] Add payload to be 32-bit aligned to fix dropped packets
  2021-11-10  9:54 Kumar Thangavel
@ 2021-11-10 13:58 ` Denis Kirjanov
  2021-11-12  3:32 ` kernel test robot
  2021-11-15  5:28 ` kernel test robot
  2 siblings, 0 replies; 10+ messages in thread
From: Denis Kirjanov @ 2021-11-10 13:58 UTC (permalink / raw)
  To: linux-aspeed



11/10/21 12:54 PM, Kumar Thangavel ?????:
> Update NC-SI command handler (both standard and OEM) to take into
> account of payload paddings in allocating skb (in case of payload
> size is not 32-bit aligned).
> 
> The checksum field follows payload field, without taking payload
> padding into account can cause checksum being truncated, leading to
> dropped packets.

Please add Fixes tag
> 
> Signed-off-by: Kumar Thangavel <thangavel.k@hcl.com>
> Acked-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
> Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
> 
> ---
>    v4:
>     - Updated existing macro for max function
> 
>    v3:
>     - Added Macro for MAX
>     - Fixed the missed semicolon
> 
>    v2:
>     - Added NC-SI spec version and section
>     - Removed blank line
>     - corrected spellings
> 
>    v1:
>     - Initial draft
> 
> ---
> ---
>   net/ncsi/ncsi-cmd.c | 21 +++++++++++++--------
>   1 file changed, 13 insertions(+), 8 deletions(-)
> 
> diff --git a/net/ncsi/ncsi-cmd.c b/net/ncsi/ncsi-cmd.c
> index ba9ae482141b..e44fe138c20f 100644
> --- a/net/ncsi/ncsi-cmd.c
> +++ b/net/ncsi/ncsi-cmd.c
> @@ -213,12 +213,16 @@ static int ncsi_cmd_handler_oem(struct sk_buff *skb,
>   {
>   	struct ncsi_cmd_oem_pkt *cmd;
>   	unsigned int len;
> +	/* NC-SI spec DSP_0222_1.2.0, section 8.2.2.2
> +	 * requires payload to be padded with 0 to
> +	 * 32-bit boundary before the checksum field.
> +	 * Ensure the padding bytes are accounted for in
> +	 * skb allocation
> +	 */
>   
> +	unsigned short payload = ALIGN(nca->payload, 4);
>   	len = sizeof(struct ncsi_cmd_pkt_hdr) + 4;
> -	if (nca->payload < 26)
> -		len += 26;
Would be nice to have a constant
> -	else
> -		len += nca->payload;
> +	len += max(payload, 26);
>   
>   	cmd = skb_put_zero(skb, len);
>   	memcpy(&cmd->mfr_id, nca->data, nca->payload);
> @@ -272,6 +276,7 @@ static struct ncsi_request *ncsi_alloc_command(struct ncsi_cmd_arg *nca)
>   	struct net_device *dev = nd->dev;
>   	int hlen = LL_RESERVED_SPACE(dev);
>   	int tlen = dev->needed_tailroom;
> +	int payload;
>   	int len = hlen + tlen;
>   	struct sk_buff *skb;
>   	struct ncsi_request *nr;
> @@ -281,14 +286,14 @@ static struct ncsi_request *ncsi_alloc_command(struct ncsi_cmd_arg *nca)
>   		return NULL;
>   
>   	/* NCSI command packet has 16-bytes header, payload, 4 bytes checksum.
> +	 * Payload needs padding so that the checksum field following payload is
> +	 * aligned to 32-bit boundary.
>   	 * The packet needs padding if its payload is less than 26 bytes to
>   	 * meet 64 bytes minimal ethernet frame length.
>   	 */
>   	len += sizeof(struct ncsi_cmd_pkt_hdr) + 4;
> -	if (nca->payload < 26)
> -		len += 26;
> -	else
> -		len += nca->payload;
> +	payload = ALIGN(nca->payload, 4);
> +	len += max(payload, 26);
>   
>   	/* Allocate skb */
>   	skb = alloc_skb(len, GFP_ATOMIC);
> 

^ permalink raw reply	[flat|nested] 10+ messages in thread

* [PATCH v4] Add payload to be 32-bit aligned to fix dropped packets
  2021-11-10  9:54 Kumar Thangavel
  2021-11-10 13:58 ` Denis Kirjanov
@ 2021-11-12  3:32 ` kernel test robot
  2021-11-15  5:28 ` kernel test robot
  2 siblings, 0 replies; 10+ messages in thread
From: kernel test robot @ 2021-11-12  3:32 UTC (permalink / raw)
  To: linux-aspeed

Hi Kumar,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.15 next-20211111]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Kumar-Thangavel/Add-payload-to-be-32-bit-aligned-to-fix-dropped-packets/20211110-175537
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git cb690f5238d71f543f4ce874aa59237cf53a877c
config: hexagon-buildonly-randconfig-r006-20211112 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 63ef0e17e28827eae53133b3467bdac7d9729318)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/263eaf647698f405f4f9905c947bf73b87c55b79
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Kumar-Thangavel/Add-payload-to-be-32-bit-aligned-to-fix-dropped-packets/20211110-175537
        git checkout 263eaf647698f405f4f9905c947bf73b87c55b79
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=hexagon 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> net/ncsi/ncsi-cmd.c:225:9: error: comparison of distinct pointer types ('typeof (payload) *' (aka 'unsigned short *') and 'typeof (26) *' (aka 'int *')) [-Werror,-Wcompare-distinct-pointer-types]
           len += max(payload, 26);
                  ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:52:19: note: expanded from macro 'max'
   #define max(x, y)       __careful_cmp(x, y, >)
                           ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
           __builtin_choose_expr(__safe_cmp(x, y), \
                                 ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
                   (__typecheck(x, y) && __no_side_effects(x, y))
                    ^~~~~~~~~~~~~~~~~
   include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
           (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
                      ~~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~~~
   1 error generated.


vim +225 net/ncsi/ncsi-cmd.c

   210	
   211	static int ncsi_cmd_handler_oem(struct sk_buff *skb,
   212					struct ncsi_cmd_arg *nca)
   213	{
   214		struct ncsi_cmd_oem_pkt *cmd;
   215		unsigned int len;
   216		/* NC-SI spec DSP_0222_1.2.0, section 8.2.2.2
   217		 * requires payload to be padded with 0 to
   218		 * 32-bit boundary before the checksum field.
   219		 * Ensure the padding bytes are accounted for in
   220		 * skb allocation
   221		 */
   222	
   223		unsigned short payload = ALIGN(nca->payload, 4);
   224		len = sizeof(struct ncsi_cmd_pkt_hdr) + 4;
 > 225		len += max(payload, 26);
   226	
   227		cmd = skb_put_zero(skb, len);
   228		memcpy(&cmd->mfr_id, nca->data, nca->payload);
   229		ncsi_cmd_build_header(&cmd->cmd.common, nca);
   230	
   231		return 0;
   232	}
   233	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all at lists.01.org
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^ permalink raw reply	[flat|nested] 10+ messages in thread

* [PATCH v4] Add payload to be 32-bit aligned to fix dropped packets
  2021-11-10  9:54 Kumar Thangavel
  2021-11-10 13:58 ` Denis Kirjanov
  2021-11-12  3:32 ` kernel test robot
@ 2021-11-15  5:28 ` kernel test robot
  2 siblings, 0 replies; 10+ messages in thread
From: kernel test robot @ 2021-11-15  5:28 UTC (permalink / raw)
  To: linux-aspeed

Hi Kumar,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.16-rc1 next-20211115]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Kumar-Thangavel/Add-payload-to-be-32-bit-aligned-to-fix-dropped-packets/20211110-175537
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git cb690f5238d71f543f4ce874aa59237cf53a877c
config: riscv-buildonly-randconfig-r006-20211115 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project fbe72e41b99dc7994daac300d208a955be3e4a0a)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://github.com/0day-ci/linux/commit/263eaf647698f405f4f9905c947bf73b87c55b79
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Kumar-Thangavel/Add-payload-to-be-32-bit-aligned-to-fix-dropped-packets/20211110-175537
        git checkout 263eaf647698f405f4f9905c947bf73b87c55b79
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=riscv 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> net/ncsi/ncsi-cmd.c:225:9: warning: comparison of distinct pointer types ('typeof (payload) *' (aka 'unsigned short *') and 'typeof (26) *' (aka 'int *')) [-Wcompare-distinct-pointer-types]
           len += max(payload, 26);
                  ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:52:19: note: expanded from macro 'max'
   #define max(x, y)       __careful_cmp(x, y, >)
                           ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
           __builtin_choose_expr(__safe_cmp(x, y), \
                                 ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
                   (__typecheck(x, y) && __no_side_effects(x, y))
                    ^~~~~~~~~~~~~~~~~
   include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
           (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
                      ~~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~~~
   1 warning generated.


vim +225 net/ncsi/ncsi-cmd.c

   210	
   211	static int ncsi_cmd_handler_oem(struct sk_buff *skb,
   212					struct ncsi_cmd_arg *nca)
   213	{
   214		struct ncsi_cmd_oem_pkt *cmd;
   215		unsigned int len;
   216		/* NC-SI spec DSP_0222_1.2.0, section 8.2.2.2
   217		 * requires payload to be padded with 0 to
   218		 * 32-bit boundary before the checksum field.
   219		 * Ensure the padding bytes are accounted for in
   220		 * skb allocation
   221		 */
   222	
   223		unsigned short payload = ALIGN(nca->payload, 4);
   224		len = sizeof(struct ncsi_cmd_pkt_hdr) + 4;
 > 225		len += max(payload, 26);
   226	
   227		cmd = skb_put_zero(skb, len);
   228		memcpy(&cmd->mfr_id, nca->data, nca->payload);
   229		ncsi_cmd_build_header(&cmd->cmd.common, nca);
   230	
   231		return 0;
   232	}
   233	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all at lists.01.org
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^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2021-11-15  5:28 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2021-10-28  9:50 [PATCH v4] Add payload to be 32-bit aligned to fix dropped packets Kumar Thangavel
2021-11-03 15:11 ` Kumar Thangavel
2021-11-03 15:49   ` Jakub Kicinski
2021-11-03 16:13     ` Kumar Thangavel
2021-11-03 16:16       ` Jakub Kicinski
2021-11-03 16:37         ` Kumar Thangavel
  -- strict thread matches above, loose matches on Subject: below --
2021-11-10  9:54 Kumar Thangavel
2021-11-10 13:58 ` Denis Kirjanov
2021-11-12  3:32 ` kernel test robot
2021-11-15  5:28 ` kernel test robot

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