From mboxrd@z Thu Jan 1 00:00:00 1970 From: fengguang.wu@intel.com (kbuild test robot) Date: Tue, 6 Nov 2018 20:07:24 +0800 Subject: [PATCH] media: meson: fix zalloc-simple.cocci warnings In-Reply-To: <20181106075926.19269-3-mjourdan@baylibre.com> References: <20181106075926.19269-3-mjourdan@baylibre.com> Message-ID: <20181106120724.GA79146@athens> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: kbuild test robot drivers/media/platform/meson/vdec/esparser.c:148:13-31: WARNING: dma_zalloc_coherent should be used for eos_vaddr, instead of dma_alloc_coherent/memset Use zeroing allocator rather than allocator followed by memset with 0 This considers some simple cases that are common and easy to validate Note in particular that there are no ...s in the rule, so all of the matched code has to be contiguous Generated by: scripts/coccinelle/api/alloc/zalloc-simple.cocci Fixes: 3ab8ea56b2f6 ("media: meson: add v4l2 m2m video decoder driver") CC: Maxime Jourdan Signed-off-by: kbuild test robot --- url: https://github.com/0day-ci/linux/commits/Maxime-Jourdan/dt-bindings-media-add-Amlogic-Video-Decoder-Bindings/20181106-162646 base: git://linuxtv.org/media_tree.git master Please take the patch only if it's a positive warning. Thanks! esparser.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) --- a/drivers/media/platform/meson/vdec/esparser.c +++ b/drivers/media/platform/meson/vdec/esparser.c @@ -145,13 +145,11 @@ int esparser_queue_eos(struct amvdec_cor dma_addr_t eos_paddr; int ret; - eos_vaddr = dma_alloc_coherent(dev, - len + SEARCH_PATTERN_LEN, - &eos_paddr, GFP_KERNEL); + eos_vaddr = dma_zalloc_coherent(dev, len + SEARCH_PATTERN_LEN, + &eos_paddr, GFP_KERNEL); if (!eos_vaddr) return -ENOMEM; - memset(eos_vaddr, 0, len + SEARCH_PATTERN_LEN); memcpy(eos_vaddr, data, len); ret = esparser_write_data(core, eos_paddr, len); dma_free_coherent(dev, len + SEARCH_PATTERN_LEN,