crypto: ccp - Get a free page to use while fetching initial nonce
dbc_dev_init() gets a free page from `GFP_KERNEL`, but if that page has any data in it the first nonce request will fail. This prevents dynamic boost control from probing. To fix this, explicitly request a zeroed page with `__GFP_ZERO` to ensure first nonce fetch works. Fixes: c04cf9e14f10 ("crypto: ccp - Add support for fetching a nonce for dynamic boost control") Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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@ -205,7 +205,7 @@ int dbc_dev_init(struct psp_device *psp)
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return -ENOMEM;
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BUILD_BUG_ON(sizeof(union dbc_buffer) > PAGE_SIZE);
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dbc_dev->mbox = (void *)devm_get_free_pages(dev, GFP_KERNEL, 0);
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dbc_dev->mbox = (void *)devm_get_free_pages(dev, GFP_KERNEL | __GFP_ZERO, 0);
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if (!dbc_dev->mbox) {
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ret = -ENOMEM;
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goto cleanup_dev;
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