Re: [PATCH 2/2] media: v4l2-mem2mem: add a list for buf used by hw
From: Dan Carpenter
Date: Tue Jul 11 2023 - 02:26:49 EST
Hi Hsia-Jun,
kernel test robot noticed the following build warnings:
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Hsia-Jun-Li/media-v4l2-mem2mem-allow-device-run-without-buf/20230704-120308
base: git://linuxtv.org/media_tree.git master
patch link: https://lore.kernel.org/r/20230704040044.681850-3-randy.li%40synaptics.com
patch subject: [PATCH 2/2] media: v4l2-mem2mem: add a list for buf used by hw
config: arm64-randconfig-m041-20230710 (https://download.01.org/0day-ci/archive/20230711/202307110324.A5LMPHou-lkp@xxxxxxxxx/config)
compiler: aarch64-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230711/202307110324.A5LMPHou-lkp@xxxxxxxxx/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
| Closes: https://lore.kernel.org/r/202307110324.A5LMPHou-lkp@xxxxxxxxx/
smatch warnings:
drivers/media/v4l2-core/v4l2-mem2mem.c:343 __v4l2_m2m_try_queue() error: uninitialized symbol 'src'.
drivers/media/v4l2-core/v4l2-mem2mem.c:343 __v4l2_m2m_try_queue() error: uninitialized symbol 'dst'.
vim +/src +343 drivers/media/v4l2-core/v4l2-mem2mem.c
9db3bbf58be59a drivers/media/v4l2-core/v4l2-mem2mem.c Ezequiel Garcia 2018-07-25 296 static void __v4l2_m2m_try_queue(struct v4l2_m2m_dev *m2m_dev,
9db3bbf58be59a drivers/media/v4l2-core/v4l2-mem2mem.c Ezequiel Garcia 2018-07-25 297 struct v4l2_m2m_ctx *m2m_ctx)
7f98639def42a6 drivers/media/video/v4l2-mem2mem.c Pawel Osciak 2010-04-23 298 {
f8cca8c97a63d7 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 299 unsigned long flags_job;
f8cca8c97a63d7 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 300 struct vb2_v4l2_buffer *dst, *src;
7f98639def42a6 drivers/media/video/v4l2-mem2mem.c Pawel Osciak 2010-04-23 301
7f98639def42a6 drivers/media/video/v4l2-mem2mem.c Pawel Osciak 2010-04-23 302 dprintk("Trying to schedule a job for m2m_ctx: %p\n", m2m_ctx);
7f98639def42a6 drivers/media/video/v4l2-mem2mem.c Pawel Osciak 2010-04-23 303
f3e1a4c9d7a02d drivers/media/v4l2-core/v4l2-mem2mem.c Randy Li 2023-07-04 304 if (!(m2m_ctx->out_q_ctx.q.streaming || m2m_ctx->out_q_ctx.buffered)
f3e1a4c9d7a02d drivers/media/v4l2-core/v4l2-mem2mem.c Randy Li 2023-07-04 305 || !(m2m_ctx->cap_q_ctx.q.streaming
f3e1a4c9d7a02d drivers/media/v4l2-core/v4l2-mem2mem.c Randy Li 2023-07-04 306 || m2m_ctx->cap_q_ctx.buffered)) {
7f98639def42a6 drivers/media/video/v4l2-mem2mem.c Pawel Osciak 2010-04-23 307 dprintk("Streaming needs to be on for both queues\n");
7f98639def42a6 drivers/media/video/v4l2-mem2mem.c Pawel Osciak 2010-04-23 308 return;
7f98639def42a6 drivers/media/video/v4l2-mem2mem.c Pawel Osciak 2010-04-23 309 }
7f98639def42a6 drivers/media/video/v4l2-mem2mem.c Pawel Osciak 2010-04-23 310
7f98639def42a6 drivers/media/video/v4l2-mem2mem.c Pawel Osciak 2010-04-23 311 spin_lock_irqsave(&m2m_dev->job_spinlock, flags_job);
2ad5389b341282 drivers/media/v4l2-core/v4l2-mem2mem.c Shaik Ameer Basha 2013-09-20 312
2ad5389b341282 drivers/media/v4l2-core/v4l2-mem2mem.c Shaik Ameer Basha 2013-09-20 313 /* If the context is aborted then don't schedule it */
2ad5389b341282 drivers/media/v4l2-core/v4l2-mem2mem.c Shaik Ameer Basha 2013-09-20 314 if (m2m_ctx->job_flags & TRANS_ABORT) {
2ad5389b341282 drivers/media/v4l2-core/v4l2-mem2mem.c Shaik Ameer Basha 2013-09-20 315 dprintk("Aborted context\n");
cbec2836f8be61 drivers/media/v4l2-core/v4l2-mem2mem.c Sakari Ailus 2018-10-18 316 goto job_unlock;
2ad5389b341282 drivers/media/v4l2-core/v4l2-mem2mem.c Shaik Ameer Basha 2013-09-20 317 }
2ad5389b341282 drivers/media/v4l2-core/v4l2-mem2mem.c Shaik Ameer Basha 2013-09-20 318
7f98639def42a6 drivers/media/video/v4l2-mem2mem.c Pawel Osciak 2010-04-23 319 if (m2m_ctx->job_flags & TRANS_QUEUED) {
7f98639def42a6 drivers/media/video/v4l2-mem2mem.c Pawel Osciak 2010-04-23 320 dprintk("On job queue already\n");
cbec2836f8be61 drivers/media/v4l2-core/v4l2-mem2mem.c Sakari Ailus 2018-10-18 321 goto job_unlock;
7f98639def42a6 drivers/media/video/v4l2-mem2mem.c Pawel Osciak 2010-04-23 322 }
7f98639def42a6 drivers/media/video/v4l2-mem2mem.c Pawel Osciak 2010-04-23 323
cafbe530b02613 drivers/media/v4l2-core/v4l2-mem2mem.c Hsia-Jun(Randy Li 2023-07-04 324) if (list_empty(&m2m_ctx->out_q_ctx.hw_queue)) {
f8cca8c97a63d7 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 325 src = v4l2_m2m_next_src_buf(m2m_ctx);
cafbe530b02613 drivers/media/v4l2-core/v4l2-mem2mem.c Hsia-Jun(Randy Li 2023-07-04 326)
f8cca8c97a63d7 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 327 if (!src && !m2m_ctx->out_q_ctx.buffered) {
7f98639def42a6 drivers/media/video/v4l2-mem2mem.c Pawel Osciak 2010-04-23 328 dprintk("No input buffers available\n");
f8cca8c97a63d7 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 329 goto job_unlock;
7f98639def42a6 drivers/media/video/v4l2-mem2mem.c Pawel Osciak 2010-04-23 330 }
cafbe530b02613 drivers/media/v4l2-core/v4l2-mem2mem.c Hsia-Jun(Randy Li 2023-07-04 331) }
src uninitialized on else path.
cafbe530b02613 drivers/media/v4l2-core/v4l2-mem2mem.c Hsia-Jun(Randy Li 2023-07-04 332)
cafbe530b02613 drivers/media/v4l2-core/v4l2-mem2mem.c Hsia-Jun(Randy Li 2023-07-04 333) if (list_empty(&m2m_ctx->cap_q_ctx.hw_queue)) {
cafbe530b02613 drivers/media/v4l2-core/v4l2-mem2mem.c Hsia-Jun(Randy Li 2023-07-04 334) dst = v4l2_m2m_next_dst_buf(m2m_ctx);
f8cca8c97a63d7 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 335 if (!dst && !m2m_ctx->cap_q_ctx.buffered) {
7f98639def42a6 drivers/media/video/v4l2-mem2mem.c Pawel Osciak 2010-04-23 336 dprintk("No output buffers available\n");
f8cca8c97a63d7 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 337 goto job_unlock;
f8cca8c97a63d7 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 338 }
cafbe530b02613 drivers/media/v4l2-core/v4l2-mem2mem.c Hsia-Jun(Randy Li 2023-07-04 339) }
dst not initialized if !list_empty()
f8cca8c97a63d7 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 340
f07602ac388723 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 341 m2m_ctx->new_frame = true;
f07602ac388723 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 342
f07602ac388723 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 @343 if (src && dst && dst->is_held &&
Uninitialized.
f07602ac388723 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 344 dst->vb2_buf.copied_timestamp &&
f8cca8c97a63d7 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 345 dst->vb2_buf.timestamp != src->vb2_buf.timestamp) {
86ef61ad686c17 drivers/media/v4l2-core/v4l2-mem2mem.c Nicolas Dufresne 2022-04-26 346 dprintk("Timestamp mismatch, returning held capture buffer\n");
f8cca8c97a63d7 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 347 dst->is_held = false;
f8cca8c97a63d7 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 348 v4l2_m2m_dst_buf_remove(m2m_ctx);
f8cca8c97a63d7 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 349 v4l2_m2m_buf_done(dst, VB2_BUF_STATE_DONE);
f8cca8c97a63d7 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 350 dst = v4l2_m2m_next_dst_buf(m2m_ctx);
f8cca8c97a63d7 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 351
f8cca8c97a63d7 drivers/media/v4l2-core/v4l2-mem2mem.c Hans Verkuil 2019-10-11 352 if (!dst && !m2m_ctx->cap_q_ctx.buffered) {
--
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