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SubjectRe: [PATCH 30/30] sound/soc: Use kmemdup rather than duplicating its implementation
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On 03/07/19 14:18, Fuqian Huang wrote:
> kmemdup is introduced to duplicate a region of memory in a neat way.
> Rather than kmalloc/kzalloc + memset, which the programmer needs to
> write the size twice (sometimes lead to mistakes), kmemdup improves
> readability, leads to smaller code and also reduce the chances of mistakes.
> Suggestion to use kmemdup rather than using kmalloc/kzalloc + memset.
>
> Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
> ---
> sound/soc/codecs/wm0010.c | 4 +---
> sound/soc/intel/atom/sst/sst_loader.c | 3 +--

Should be one patch per file as the drivers are not related to each
other at all, and if one needed a revert you couldn't revert this
patch because it would revert both drivers.

But apart from that, for wm0010.c:
Acked-by: Richard Fitzgerald <rf@opensource.cirrus.com>

> 2 files changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/sound/soc/codecs/wm0010.c b/sound/soc/codecs/wm0010.c
> index 727d6703c905..807826f30f58 100644
> --- a/sound/soc/codecs/wm0010.c
> +++ b/sound/soc/codecs/wm0010.c
> @@ -515,7 +515,7 @@ static int wm0010_stage2_load(struct snd_soc_component *component)
> dev_dbg(component->dev, "Downloading %zu byte stage 2 loader\n", fw->size);
>
> /* Copy to local buffer first as vmalloc causes problems for dma */
> - img = kzalloc(fw->size, GFP_KERNEL | GFP_DMA);
> + img = kmemdup(&fw->data[0], fw->size, GFP_KERNEL | GFP_DMA);
> if (!img) {
> ret = -ENOMEM;
> goto abort2;
> @@ -527,8 +527,6 @@ static int wm0010_stage2_load(struct snd_soc_component *component)
> goto abort1;
> }
>
> - memcpy(img, &fw->data[0], fw->size);
> -
> spi_message_init(&m);
> memset(&t, 0, sizeof(t));
> t.rx_buf = out;
> diff --git a/sound/soc/intel/atom/sst/sst_loader.c b/sound/soc/intel/atom/sst/sst_loader.c
> index ce11c36848c4..cc95af35c060 100644
> --- a/sound/soc/intel/atom/sst/sst_loader.c
> +++ b/sound/soc/intel/atom/sst/sst_loader.c
> @@ -288,14 +288,13 @@ static int sst_cache_and_parse_fw(struct intel_sst_drv *sst,
> {
> int retval = 0;
>
> - sst->fw_in_mem = kzalloc(fw->size, GFP_KERNEL);
> + sst->fw_in_mem = kmemdup(fw->data, fw->size, GFP_KERNEL);
> if (!sst->fw_in_mem) {
> retval = -ENOMEM;
> goto end_release;
> }
> dev_dbg(sst->dev, "copied fw to %p", sst->fw_in_mem);
> dev_dbg(sst->dev, "phys: %lx", (unsigned long)virt_to_phys(sst->fw_in_mem));
> - memcpy(sst->fw_in_mem, fw->data, fw->size);
> retval = sst_parse_fw_memcpy(sst, fw->size, &sst->memcpy_list);
> if (retval) {
> dev_err(sst->dev, "Failed to parse fw\n");
>

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