linux-kernel - Re: [PATCH v4 19/19] dmaengine: ti: k3-udma: switch to synchronous descriptor freeing

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Message-ID: <202601310444.S9H39g4c-lkp@intel.com>
Date: Sat, 31 Jan 2026 04:37:06 +0800
From: kernel test robot <lkp@...el.com>
To: Sai Sree Kartheek Adivi <s-adivi@...com>, peter.ujfalusi@...il.com,
	vkoul@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
	conor+dt@...nel.org, nm@...com, ssantosh@...nel.org,
	dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	vigneshr@...com
Cc: oe-kbuild-all@...ts.linux.dev, r-sharma3@...com, gehariprasath@...com
Subject: Re: [PATCH v4 19/19] dmaengine: ti: k3-udma: switch to synchronous
 descriptor freeing

Hi Sai,

kernel test robot noticed the following build warnings:

[auto build test WARNING on vkoul-dmaengine/next]
[also build test WARNING on next-20260130]
[cannot apply to linus/master v6.19-rc7]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Sai-Sree-Kartheek-Adivi/dmaengine-ti-k3-udma-move-macros-to-header-file/20260130-191306
base:   https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git next
patch link:    https://lore.kernel.org/r/20260130110159.359501-20-s-adivi%40ti.com
patch subject: [PATCH v4 19/19] dmaengine: ti: k3-udma: switch to synchronous descriptor freeing
config: arm64-defconfig (https://download.01.org/0day-ci/archive/20260131/202601310444.S9H39g4c-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260131/202601310444.S9H39g4c-lkp@intel.com/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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601310444.S9H39g4c-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/dma/ti/k3-udma-common.c: In function 'udma_desc_free':
>> drivers/dma/ti/k3-udma-common.c:103:23: warning: unused variable 'flags' [-Wunused-variable]
     103 |         unsigned long flags;
         |                       ^~~~~
>> drivers/dma/ti/k3-udma-common.c:100:26: warning: unused variable 'ud' [-Wunused-variable]
     100 |         struct udma_dev *ud = to_udma_dev(vd->tx.chan->device);
         |                          ^~


vim +/flags +103 drivers/dma/ti/k3-udma-common.c

f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30   97  
f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30   98  void udma_desc_free(struct virt_dma_desc *vd)
f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30   99  {
f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30 @100  	struct udma_dev *ud = to_udma_dev(vd->tx.chan->device);
f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30  101  	struct udma_chan *uc = to_udma_chan(vd->tx.chan);
f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30  102  	struct udma_desc *d = to_udma_desc(&vd->tx);
f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30 @103  	unsigned long flags;
f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30  104  
f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30  105  	if (uc->terminated_desc == d)
f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30  106  		uc->terminated_desc = NULL;
f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30  107  
f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30  108  	udma_free_hwdesc(uc, d);
f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30  109  	kfree(d);
f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30  110  	return;
f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30  111  }
f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30  112  EXPORT_SYMBOL_GPL(udma_desc_free);
f30a784b467d1f Sai Sree Kartheek Adivi 2026-01-30  113  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki