Messages in this thread | | | Date | Fri, 24 Mar 2023 09:11:34 +0100 | Subject | Re: [PATCH v2 2/8] media: videobuf2: Make bufs array dynamic allocated | From | Benjamin Gaignard <> |
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Le 24/03/2023 à 06:01, Dan Carpenter a écrit : > Hi Benjamin, > > https://git-scm.com/docs/git-format-patch#_base_tree_information] > > url: https://github.com/intel-lab-lkp/linux/commits/Benjamin-Gaignard/media-videobuf2-Access-vb2_queue-bufs-array-through-helper-functions/20230321-183154 > base: git://linuxtv.org/media_tree.git master > patch link: https://lore.kernel.org/r/20230321102855.346732-3-benjamin.gaignard%40collabora.com > patch subject: [PATCH v2 2/8] media: videobuf2: Make bufs array dynamic allocated > config: arm64-randconfig-m041-20230319 (https://download.01.org/0day-ci/archive/20230324/202303240148.lKRnUqW9-lkp@intel.com/config) > compiler: aarch64-linux-gcc (GCC) 12.1.0 > > If you fix the issue, kindly add following tag where applicable > | Reported-by: kernel test robot <lkp@intel.com> > | Reported-by: Dan Carpenter <error27@gmail.com> > | Link: https://lore.kernel.org/r/202303240148.lKRnUqW9-lkp@intel.com/ > > smatch warnings: > include/media/videobuf2-core.h:1272 vb2_queue_add_buffer() warn: sleeping in atomic context > drivers/media/common/videobuf2/videobuf2-core.c:2456 vb2_core_queue_init() warn: Please consider using kcalloc instead of kmalloc_array > > vim +1272 include/media/videobuf2-core.h > > 625d46c1c1fe8e Benjamin Gaignard 2023-03-21 1263 static inline bool vb2_queue_add_buffer(struct vb2_queue *q, struct vb2_buffer *vb) > 625d46c1c1fe8e Benjamin Gaignard 2023-03-21 1264 { > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1265 bool ret = false; > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1266 > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1267 spin_lock(&q->bufs_lock); > ^^^^^^^^^^^^^^^^^^^^^^^ > Holding a spin lock. > > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1268 > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1269 if (vb->index >= q->max_num_bufs) { > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1270 struct vb2_buffer **tmp; > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1271 > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 @1272 tmp = krealloc_array(q->bufs, q->max_num_bufs * 2, sizeof(*q->bufs), GFP_KERNEL); > ^^^^^^^^^^ > Sleeping allocation. GFP_ATOMIC? Or is there a way to move the > allocation outside the lock?
I will add GFP_ATOMIC flag in next version.
Thanks for your help, Benjamin
> > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1273 if (!tmp) > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1274 goto realloc_failed; > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1275 > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1276 q->max_num_bufs *= 2; > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1277 q->bufs = tmp; > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1278 } > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1279 > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1280 if (vb->index < q->max_num_bufs) { > 625d46c1c1fe8e Benjamin Gaignard 2023-03-21 1281 q->bufs[vb->index] = vb; > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1282 ret = true; > 625d46c1c1fe8e Benjamin Gaignard 2023-03-21 1283 } > 625d46c1c1fe8e Benjamin Gaignard 2023-03-21 1284 > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1285 realloc_failed: > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1286 spin_unlock(&q->bufs_lock); > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1287 > 487d3f14d12ecf Benjamin Gaignard 2023-03-21 1288 return ret; > 625d46c1c1fe8e Benjamin Gaignard 2023-03-21 1289 } >
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