Hi Laurent, I love your patch! Perhaps something to improve: [auto build test WARNING on linuxtv-media/master] [also build test WARNING on v5.7-rc1 next-20200413] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Laurent-Pinchart/media-imx6-Supp... base: git://linuxtv.org/media_tree.git master If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; cppcheck warnings: (new ones prefixed by >>) drivers/staging/media/imx/imx-media-of.c:169:6: warning: The scope of the variable 'ret' can be reduced. [variableScope] int ret; ^ ? MEDIA_PAD_FL_SOURCE : MEDIA_PAD_FL_SINK; ^ drivers/staging/media/imx/imx-media-of.c:130:38: warning: Clarify calculation precedence for '&' and '?'. [clarifyCalculation] pad_flags & MEDIA_PAD_FL_SOURCE ? ^ vim +110 drivers/staging/media/imx/imx-media-of.c 77 78 /* 79 * Create a single media link to/from sd using a fwnode link. 80 * 81 * NOTE: this function assumes that an OF endpoint node is equivalent to a 82 * media link. 83 */ 84 static int create_of_link(struct imx_media_dev *imxmd, 85 struct v4l2_subdev *sd, 86 struct v4l2_fwnode_link *link) 87 { 88 struct v4l2_subdev *remote, *src, *sink; 89 int src_pad, sink_pad; 90 int remote_pad; 91 u32 pad_flags; 92 93 if (link->local_port >= sd->entity.num_pads) 94 return -EINVAL; 95 96 remote = imx_media_find_subdev_by_fwnode(imxmd, link->remote_node); 97 if (!remote) 98 return 0; 99 100 /* 101 * Find the remote pad. Try the pad corresponding to the fwnode port id 102 * first. If its direction doesn't correspond to what we expect, use the 103 * first pad that has the right direction. 104 * 105 * FIXME: Media entities should provide an operation to translate from 106 * fwnode port id to pad index. 107 */ 108 pad_flags = sd->entity.pads[link->local_port].flags; 109 pad_flags = pad_flags & MEDIA_PAD_FL_SINK 111 112 if (link->remote_port < remote->entity.num_pads && 113 remote->entity.pads[link->remote_port].flags & pad_flags) { 114 remote_pad = link->remote_port; 115 } else { 116 unsigned int i; 117 118 remote_pad = -1; 119 for (i = 0; i < remote->entity.num_pads; ++i) { 120 if (remote->entity.pads[i].flags & pad_flags) { 121 remote_pad = i; 122 break; 123 } 124 } 125 126 if (remote_pad == -1) { 127 v4l2_err(sd->v4l2_dev, 128 "remote entity %s has no %s pad\n", 129 remote->name, 130 pad_flags & MEDIA_PAD_FL_SOURCE ? 131 "source" : "sink"); 132 return -EINVAL; 133 } 134 } 135 136 /* Mad the local and remote entities to source and sink. */ 137 if (pad_flags & MEDIA_PAD_FL_SOURCE) { 138 src = remote; 139 src_pad = remote_pad; 140 sink = sd; 141 sink_pad = link->local_port; 142 } else { 143 src = sd; 144 src_pad = link->local_port; 145 sink = remote; 146 sink_pad = remote_pad; 147 } 148 149 /* Make sure link doesn't already exist before creating it. */ 150 if (media_entity_find_link(&src->entity.pads[src_pad], 151 &sink->entity.pads[sink_pad])) 152 return 0; 153 154 v4l2_info(sd->v4l2_dev, "%s:%d -> %s:%d\n", 155 src->name, src_pad, sink->name, sink_pad); 156 157 return media_create_pad_link(&src->entity, src_pad, 158 &sink->entity, sink_pad, 0); 159 } 160 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org