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drm: xlnx: zynqmp_dpsub: Add NULL check in zynqmp_audio_init

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devm_kasprintf() calls can return null pointers on failure.
But some return values were not checked in zynqmp_audio_init().

Add NULL check in zynqmp_audio_init(), avoid referencing null
pointers in the subsequent code.

Fixes: 3ec5c15793 ("drm: xlnx: zynqmp_dpsub: Add DP audio support")
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Charles Han <hanchunchao@inspur.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250211102049.6468-1-hanchunchao@inspur.com
This commit is contained in:
Charles Han 2025-02-11 18:20:49 +08:00 committed by Tomi Valkeinen
parent 28b529a985
commit d0660f9c58
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/xlnx/zynqmp_dp_audio.c
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@ -323,12 +323,16 @@ int zynqmp_audio_init(struct zynqmp_dpsub *dpsub)
audio->dai_name = devm_kasprintf(dev, GFP_KERNEL,
"%s-dai", dev_name(dev));
if (!audio->dai_name)
return -ENOMEM;
for (unsigned int i = 0; i < ZYNQMP_NUM_PCMS; ++i) {
audio->link_names[i] = devm_kasprintf(dev, GFP_KERNEL,
"%s-dp-%u", dev_name(dev), i);
audio->pcm_names[i] = devm_kasprintf(dev, GFP_KERNEL,
"%s-pcm-%u", dev_name(dev), i);
if (!audio->link_names[i] || !audio->pcm_names[i])
return -ENOMEM;
}
audio->base = devm_platform_ioremap_resource_byname(pdev, "aud");