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| author | Mario Limonciello <mario.limonciello@amd.com> | 2023-08-29 10:07:55 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-11-20 11:59:18 +0100 |
| commit | 4c2c057d771c956c6a4504a46ed416725bbe50ee (patch) | |
| tree | e0b9945861979801a4dbd57fdd8512f6a172548e /drivers/crypto | |
| parent | 93a2477b87e1949e271ffa91d6cc316498ac40e1 (diff) | |
| download | linux-4c2c057d771c956c6a4504a46ed416725bbe50ee.tar.gz linux-4c2c057d771c956c6a4504a46ed416725bbe50ee.tar.bz2 linux-4c2c057d771c956c6a4504a46ed416725bbe50ee.zip | |
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 <mario.limonciello@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/ccp/dbc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/crypto/ccp/dbc.c b/drivers/crypto/ccp/dbc.c index 839ea14b9a85..6f33149ef80d 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; |