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[
    {
        "id": 116698,
        "web_url": "https://patches.dpdk.org/comment/116698/",
        "msgid": "<MN2PR11MB4063504834916505D09747929C720@MN2PR11MB4063.namprd11.prod.outlook.com>",
        "date": "2020-07-27T12:52:45",
        "subject": "Re: [dpdk-dev] [PATCH v1] vhost: fix async callback return type\n\tdefine",
        "submitter": {
            "id": 1276,
            "url": "https://patches.dpdk.org/api/people/1276/",
            "name": "Xia, Chenbo",
            "email": "chenbo.xia@intel.com"
        },
        "content": "> -----Original Message-----\n> From: Fu, Patrick <patrick.fu@intel.com>\n> Sent: Thursday, July 23, 2020 1:39 PM\n> To: dev@dpdk.org; maxime.coquelin@redhat.com; Xia, Chenbo\n> <chenbo.xia@intel.com>\n> Cc: Fu, Patrick <patrick.fu@intel.com>\n> Subject: [PATCH v1] vhost: fix async callback return type define\n> \n> From: Patrick Fu <patrick.fu@intel.com>\n> \n> The async copy device callbacks are used by async APIs to transfer data and\n> check completion status. Async APIs return the number of packets successfully\n> processed to the caller applications and no error (negative) value is allowed for\n> API return value. Thus, negative return values from async device callbacks don't\n> have meaningful usage, while adding overhead in checking the return value\n> validity. This patch change the callback return values from \"int\" to \"uint32_t\" to\n> get aligned with async API definition.\n> \n> Fixes: 78639d54563a (\"vhost: introduce async enqueue registration API\")\n> \n> Signed-off-by: Patrick Fu <patrick.fu@intel.com>\n> ---\n>  lib/librte_vhost/rte_vhost_async.h | 10 +++++-----\n>  1 file changed, 5 insertions(+), 5 deletions(-)\n> \n> diff --git a/lib/librte_vhost/rte_vhost_async.h\n> b/lib/librte_vhost/rte_vhost_async.h\n> index c8ad8dbc7..66d258abe 100644\n> --- a/lib/librte_vhost/rte_vhost_async.h\n> +++ b/lib/librte_vhost/rte_vhost_async.h\n> @@ -59,9 +59,9 @@ struct rte_vhost_async_channel_ops {\n>  \t * @param count\n>  \t *  number of elements in the \"descs\" array\n>  \t * @return\n> -\t *  -1 on failure, number of descs processed on success\n> +\t *  number of descs processed on success\n>  \t */\n> -\tint (*transfer_data)(int vid, uint16_t queue_id,\n> +\tuint32_t (*transfer_data)(int vid, uint16_t queue_id,\n>  \t\tstruct rte_vhost_async_desc *descs,\n>  \t\tstruct rte_vhost_async_status *opaque_data,\n>  \t\tuint16_t count);\n> @@ -70,15 +70,15 @@ struct rte_vhost_async_channel_ops {\n>  \t * @param vid\n>  \t *  id of vhost device to check copy completion\n>  \t * @param queue_id\n> -\t *  queue id to check copyp completion\n> +\t *  queue id to check copy completion\n>  \t * @param opaque_data\n>  \t *  buffer to receive the opaque data pair from DMA engine\n>  \t * @param max_packets\n>  \t *  max number of packets could be completed\n>  \t * @return\n> -\t *  -1 on failure, number of iov segments completed on success\n> +\t *  number of iov segments completed on success\n>  \t */\n> -\tint (*check_completed_copies)(int vid, uint16_t queue_id,\n> +\tuint32_t (*check_completed_copies)(int vid, uint16_t queue_id,\n>  \t\tstruct rte_vhost_async_status *opaque_data,\n>  \t\tuint16_t max_packets);\n>  };\n> --\n> 2.18.4\n\nReviewed-by: Chenbo Xia <chenbo.xia@intel.com>",
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            "Subject": "Re: [dpdk-dev] [PATCH v1] vhost: fix async callback return type\n\tdefine",
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            "From": "\"Xia, Chenbo\" <chenbo.xia@intel.com>",
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            "To": "\"Fu, Patrick\" <patrick.fu@intel.com>, \"dev@dpdk.org\" <dev@dpdk.org>,\n \"maxime.coquelin@redhat.com\" <maxime.coquelin@redhat.com>",
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            "Thread-Topic": "[PATCH v1] vhost: fix async callback return type define",
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    {
        "id": 116750,
        "web_url": "https://patches.dpdk.org/comment/116750/",
        "msgid": "<2faeef8f-01e0-aaee-8105-7027c49e4589@redhat.com>",
        "date": "2020-07-28T09:10:16",
        "subject": "Re: [dpdk-dev] [PATCH v1] vhost: fix async callback return type\n\tdefine",
        "submitter": {
            "id": 512,
            "url": "https://patches.dpdk.org/api/people/512/",
            "name": "Maxime Coquelin",
            "email": "maxime.coquelin@redhat.com"
        },
        "content": "On 7/23/20 7:39 AM, patrick.fu@intel.com wrote:\n> From: Patrick Fu <patrick.fu@intel.com>\n> \n> The async copy device callbacks are used by async APIs to transfer data\n> and check completion status. Async APIs return the number of packets\n> successfully processed to the caller applications and no error (negative)\n> value is allowed for API return value. Thus, negative return values\n> from async device callbacks don't have meaningful usage, while adding\n> overhead in checking the return value validity. This patch change the\n> callback return values from \"int\" to \"uint32_t\" to get aligned with\n> async API definition.\n> \n> Fixes: 78639d54563a (\"vhost: introduce async enqueue registration API\")\n> \n> Signed-off-by: Patrick Fu <patrick.fu@intel.com>\n> ---\n>  lib/librte_vhost/rte_vhost_async.h | 10 +++++-----\n>  1 file changed, 5 insertions(+), 5 deletions(-)\n> \n> diff --git a/lib/librte_vhost/rte_vhost_async.h b/lib/librte_vhost/rte_vhost_async.h\n> index c8ad8dbc7..66d258abe 100644\n> --- a/lib/librte_vhost/rte_vhost_async.h\n> +++ b/lib/librte_vhost/rte_vhost_async.h\n> @@ -59,9 +59,9 @@ struct rte_vhost_async_channel_ops {\n>  \t * @param count\n>  \t *  number of elements in the \"descs\" array\n>  \t * @return\n> -\t *  -1 on failure, number of descs processed on success\n> +\t *  number of descs processed on success\n\nlet's remove on success as in case of failure it will still be the\nnumber of descriptors process, i.e. 0.\n\n>  \t */\n> -\tint (*transfer_data)(int vid, uint16_t queue_id,\n> +\tuint32_t (*transfer_data)(int vid, uint16_t queue_id,\n>  \t\tstruct rte_vhost_async_desc *descs,\n>  \t\tstruct rte_vhost_async_status *opaque_data,\n>  \t\tuint16_t count);\n> @@ -70,15 +70,15 @@ struct rte_vhost_async_channel_ops {\n>  \t * @param vid\n>  \t *  id of vhost device to check copy completion\n>  \t * @param queue_id\n> -\t *  queue id to check copyp completion\n> +\t *  queue id to check copy completion\n>  \t * @param opaque_data\n>  \t *  buffer to receive the opaque data pair from DMA engine\n>  \t * @param max_packets\n>  \t *  max number of packets could be completed\n>  \t * @return\n> -\t *  -1 on failure, number of iov segments completed on success\n> +\t *  number of iov segments completed on success\nDitto\n\n>  \t */\n> -\tint (*check_completed_copies)(int vid, uint16_t queue_id,\n> +\tuint32_t (*check_completed_copies)(int vid, uint16_t queue_id,\n>  \t\tstruct rte_vhost_async_status *opaque_data,\n>  \t\tuint16_t max_packets);\n>  };\n> \n\nOther than that:\nReviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>\n\nI can fixup the comments while applying if you agree with it.\n\nThanks,\nMaxime",
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            "Subject": "Re: [dpdk-dev] [PATCH v1] vhost: fix async callback return type\n\tdefine",
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    {
        "id": 116759,
        "web_url": "https://patches.dpdk.org/comment/116759/",
        "msgid": "<DM5PR1101MB2169BB3F98176633901477F984730@DM5PR1101MB2169.namprd11.prod.outlook.com>",
        "date": "2020-07-28T10:15:55",
        "subject": "Re: [dpdk-dev] [PATCH v1] vhost: fix async callback return type\n\tdefine",
        "submitter": {
            "id": 1781,
            "url": "https://patches.dpdk.org/api/people/1781/",
            "name": "Patrick Fu",
            "email": "patrick.fu@intel.com"
        },
        "content": "Hi Maxime,\n\n> -----Original Message-----\n> From: Maxime Coquelin <maxime.coquelin@redhat.com>\n> Sent: Tuesday, July 28, 2020 5:10 PM\n> To: Fu, Patrick <patrick.fu@intel.com>; dev@dpdk.org; Xia, Chenbo\n> <chenbo.xia@intel.com>\n> Subject: Re: [PATCH v1] vhost: fix async callback return type define\n> \n> \n> \n> On 7/23/20 7:39 AM, patrick.fu@intel.com wrote:\n> > From: Patrick Fu <patrick.fu@intel.com>\n> >\n> >  \t * @return\n> > -\t *  -1 on failure, number of iov segments completed on success\n> > +\t *  number of iov segments completed on success\n> Ditto\n> \n> >  \t */\n> > -\tint (*check_completed_copies)(int vid, uint16_t queue_id,\n> > +\tuint32_t (*check_completed_copies)(int vid, uint16_t queue_id,\n> >  \t\tstruct rte_vhost_async_status *opaque_data,\n> >  \t\tuint16_t max_packets);\n> >  };\n> >\n> \n> Other than that:\n> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>\n> \n> I can fixup the comments while applying if you agree with it.\n> \n\nYes, I think removing \"on success\" is correct there.\n\nThanks,\n\nPatrick",
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    {
        "id": 116786,
        "web_url": "https://patches.dpdk.org/comment/116786/",
        "msgid": "<db431739-f663-6cf0-c1ac-7ebb0f25d373@redhat.com>",
        "date": "2020-07-28T15:26:56",
        "subject": "Re: [dpdk-dev] [PATCH v1] vhost: fix async callback return type\n\tdefine",
        "submitter": {
            "id": 512,
            "url": "https://patches.dpdk.org/api/people/512/",
            "name": "Maxime Coquelin",
            "email": "maxime.coquelin@redhat.com"
        },
        "content": "On 7/23/20 7:39 AM, patrick.fu@intel.com wrote:\n> From: Patrick Fu <patrick.fu@intel.com>\n> \n> The async copy device callbacks are used by async APIs to transfer data\n> and check completion status. Async APIs return the number of packets\n> successfully processed to the caller applications and no error (negative)\n> value is allowed for API return value. Thus, negative return values\n> from async device callbacks don't have meaningful usage, while adding\n> overhead in checking the return value validity. This patch change the\n> callback return values from \"int\" to \"uint32_t\" to get aligned with\n> async API definition.\n> \n> Fixes: 78639d54563a (\"vhost: introduce async enqueue registration API\")\n> \n> Signed-off-by: Patrick Fu <patrick.fu@intel.com>\n> ---\n>  lib/librte_vhost/rte_vhost_async.h | 10 +++++-----\n>  1 file changed, 5 insertions(+), 5 deletions(-)\n\nApplied to dpdk-next-virtio/master with agreed fixup.\n\nThanks,\nMaxime",
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            "Subject": "Re: [dpdk-dev] [PATCH v1] vhost: fix async callback return type\n\tdefine",
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            "To": "patrick.fu@intel.com, dev@dpdk.org, chenbo.xia@intel.com",
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