[linux-next:master 11037/11394] drivers/usb/dwc2/hcd.c:2418 dwc2_alloc_split_dma_aligned_buf() warn: Please consider using kmem_cache_zalloc instead of kmem_cache_alloc

[linux-next:master 11037/11394] drivers/usb/dwc2/hcd.c:2418 dwc2_alloc_split_dma_aligned_buf() warn: Please consider using kmem_cache_zalloc instead of kmem_cache_alloc

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: Linux Memory Management List <linux-mm@kvack.org>
TO: Suren Baghdasaryan <surenb@google.com>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Linux Memory Management List <linux-mm@kvack.org>
CC: Kees Cook <keescook@chromium.org>
CC: Pasha Tatashin <pasha.tatashin@soleen.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   1870cdc0e8dee32e3c221704a2977898ba4c10e8
commit: d9886d99439ab03c75e2a736e6bc37d45e3af95f [11037/11394] mm: enumerate all gfp flags
:::::: branch date: 20 hours ago
:::::: commit date: 30 hours ago
config: i386-randconfig-141-20240301 (https://download.01.org/0day-ci/archive/20240302/202403020932.w14NIOOC-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0

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/202403020932.w14NIOOC-lkp@intel.com/

smatch warnings:
drivers/usb/dwc2/hcd.c:2418 dwc2_alloc_split_dma_aligned_buf() warn: Please consider using kmem_cache_zalloc instead of kmem_cache_alloc
drivers/mtd/devices/mchp48l640.c:175 mchp48l640_write_page() warn: Please consider using kzalloc instead of kmalloc
drivers/mtd/devices/mchp48l640.c:243 mchp48l640_read_page() warn: Please consider using kzalloc instead of kmalloc

vim +2418 drivers/usb/dwc2/hcd.c

3bc04e28a030a8b Douglas Anderson 2016-01-28  2408  
af424a410749ed7 William Wu       2018-05-11  2409  static int dwc2_alloc_split_dma_aligned_buf(struct dwc2_hsotg *hsotg,
af424a410749ed7 William Wu       2018-05-11  2410  					    struct dwc2_qh *qh,
af424a410749ed7 William Wu       2018-05-11  2411  					    struct dwc2_host_chan *chan)
af424a410749ed7 William Wu       2018-05-11  2412  {
af424a410749ed7 William Wu       2018-05-11  2413  	if (!hsotg->unaligned_cache ||
af424a410749ed7 William Wu       2018-05-11  2414  	    chan->max_packet > DWC2_KMEM_UNALIGNED_BUF_SIZE)
af424a410749ed7 William Wu       2018-05-11  2415  		return -ENOMEM;
af424a410749ed7 William Wu       2018-05-11  2416  
af424a410749ed7 William Wu       2018-05-11  2417  	if (!qh->dw_align_buf) {
af424a410749ed7 William Wu       2018-05-11 @2418  		qh->dw_align_buf = kmem_cache_alloc(hsotg->unaligned_cache,
af424a410749ed7 William Wu       2018-05-11  2419  						    GFP_ATOMIC | GFP_DMA);
af424a410749ed7 William Wu       2018-05-11  2420  		if (!qh->dw_align_buf)
af424a410749ed7 William Wu       2018-05-11  2421  			return -ENOMEM;
af424a410749ed7 William Wu       2018-05-11  2422  	}
af424a410749ed7 William Wu       2018-05-11  2423  
af424a410749ed7 William Wu       2018-05-11  2424  	qh->dw_align_buf_dma = dma_map_single(hsotg->dev, qh->dw_align_buf,
af424a410749ed7 William Wu       2018-05-11  2425  					      DWC2_KMEM_UNALIGNED_BUF_SIZE,
af424a410749ed7 William Wu       2018-05-11  2426  					      DMA_FROM_DEVICE);
af424a410749ed7 William Wu       2018-05-11  2427  
af424a410749ed7 William Wu       2018-05-11  2428  	if (dma_mapping_error(hsotg->dev, qh->dw_align_buf_dma)) {
af424a410749ed7 William Wu       2018-05-11  2429  		dev_err(hsotg->dev, "can't map align_buf\n");
af424a410749ed7 William Wu       2018-05-11  2430  		chan->align_buf = 0;
af424a410749ed7 William Wu       2018-05-11  2431  		return -EINVAL;
af424a410749ed7 William Wu       2018-05-11  2432  	}
af424a410749ed7 William Wu       2018-05-11  2433  
af424a410749ed7 William Wu       2018-05-11  2434  	chan->align_buf = qh->dw_align_buf_dma;
af424a410749ed7 William Wu       2018-05-11  2435  	return 0;
af424a410749ed7 William Wu       2018-05-11  2436  }
af424a410749ed7 William Wu       2018-05-11  2437  

:::::: The code at line 2418 was first introduced by commit
:::::: af424a410749ed7e0c2bffd3cedbc7c274d0ff6f usb: dwc2: alloc dma aligned buffer for isoc split in

:::::: TO: William Wu <william.wu@rock-chips.com>
:::::: CC: Felipe Balbi <felipe.balbi@linux.intel.com>

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