Re: [PATCH v2 2/2] dmaengine: pxa: Enable compile test

[kernel test robot <lkp@intel.com>]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
In-Reply-To: <20250114191316.857154-1-krzysztof.kozlowski@linaro.org>
References: <20250114191316.857154-1-krzysztof.kozlowski@linaro.org>
TO: Krzysztof Kozlowski <krzk@kernel.org>

Hi Krzysztof,

kernel test robot noticed the following build warnings:

[auto build test WARNING on vkoul-dmaengine/next]
[also build test WARNING on shawnguo/for-next sunxi/sunxi/for-next mani-mhi/mhi-next xilinx-xlnx/master linus/master v6.13 next-20250124]
[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/Krzysztof-Kozlowski/dmaengine-pxa-Enable-compile-test/20250115-031547
base:   https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git next
patch link:    https://lore.kernel.org/r/20250114191316.857154-1-krzysztof.kozlowski%40linaro.org
patch subject: [PATCH v2 2/2] dmaengine: pxa: Enable compile test
:::::: branch date: 11 days ago
:::::: commit date: 11 days ago
config: parisc-randconfig-r072-20250124 (https://download.01.org/0day-ci/archive/20250125/202501252153.wCMpgWlF-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 14.2.0

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@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202501252153.wCMpgWlF-lkp@intel.com/

New smatch warnings:
drivers/dma/pxa_dma.c:595 clear_chan_irq() warn: variable dereferenced before check 'phy->vchan' (see line 593)

Old smatch warnings:
drivers/dma/pxa_dma.c:1266 pxad_init_phys() error: uninitialized symbol 'ret'.

vim +595 drivers/dma/pxa_dma.c

a57e16cf03339c Robert Jarzmik 2015-05-25  583  
a57e16cf03339c Robert Jarzmik 2015-05-25  584  static unsigned int clear_chan_irq(struct pxad_phy *phy)
a57e16cf03339c Robert Jarzmik 2015-05-25  585  {
a57e16cf03339c Robert Jarzmik 2015-05-25  586  	u32 dcsr;
a57e16cf03339c Robert Jarzmik 2015-05-25  587  	u32 dint = readl(phy->base + DINT);
a57e16cf03339c Robert Jarzmik 2015-05-25  588  
a57e16cf03339c Robert Jarzmik 2015-05-25  589  	if (!(dint & BIT(phy->idx)))
a57e16cf03339c Robert Jarzmik 2015-05-25  590  		return PXA_DCSR_RUN;
a57e16cf03339c Robert Jarzmik 2015-05-25  591  
a57e16cf03339c Robert Jarzmik 2015-05-25  592  	/* clear irq */
a57e16cf03339c Robert Jarzmik 2015-05-25 @593  	dcsr = phy_readl_relaxed(phy, DCSR);
a57e16cf03339c Robert Jarzmik 2015-05-25  594  	phy_writel(phy, dcsr, DCSR);
a57e16cf03339c Robert Jarzmik 2015-05-25 @595  	if ((dcsr & PXA_DCSR_BUSERR) && (phy->vchan))
a57e16cf03339c Robert Jarzmik 2015-05-25  596  		dev_warn(&phy->vchan->vc.chan.dev->device,
a57e16cf03339c Robert Jarzmik 2015-05-25  597  			 "%s(chan=%p): PXA_DCSR_BUSERR\n",
a57e16cf03339c Robert Jarzmik 2015-05-25  598  			 __func__, &phy->vchan);
a57e16cf03339c Robert Jarzmik 2015-05-25  599  
a57e16cf03339c Robert Jarzmik 2015-05-25  600  	return dcsr & ~PXA_DCSR_RUN;
a57e16cf03339c Robert Jarzmik 2015-05-25  601  }
a57e16cf03339c Robert Jarzmik 2015-05-25  602  

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