From 4c2c057d771c956c6a4504a46ed416725bbe50ee Mon Sep 17 00:00:00 2001 From: Mario Limonciello Date: Tue, 29 Aug 2023 10:07:55 -0500 Subject: [PATCH] crypto: ccp - Get a free page to use while fetching initial nonce [ Upstream commit 53f7f779f45cbe1771bc4ae05f0320e204a18611 ] 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 Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- drivers/crypto/ccp/dbc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/crypto/ccp/dbc.c b/drivers/crypto/ccp/dbc.c index 839ea14..6f33149 100644 --- a/drivers/crypto/ccp/dbc.c +++ b/drivers/crypto/ccp/dbc.c @@ -205,7 +205,7 @@ int dbc_dev_init(struct psp_device *psp) return -ENOMEM; BUILD_BUG_ON(sizeof(union dbc_buffer) > PAGE_SIZE); - dbc_dev->mbox = (void *)devm_get_free_pages(dev, GFP_KERNEL, 0); + dbc_dev->mbox = (void *)devm_get_free_pages(dev, GFP_KERNEL | __GFP_ZERO, 0); if (!dbc_dev->mbox) { ret = -ENOMEM; goto cleanup_dev; -- 2.7.4