diff options
| author | Mario Limonciello <mario.limonciello@amd.com> | 2023-04-03 13:32:12 -0500 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2023-04-14 18:59:34 +0800 |
| commit | a19c61b06585f71c4dc1303fe6a3af79dfe33678 (patch) | |
| tree | 3001f49fb0c6567fc7745d99d3c80dec3c992c4b | |
| parent | e0358dedff4ff432318665927d45f4786c34ed52 (diff) | |
| download | linux-stable-a19c61b06585f71c4dc1303fe6a3af79dfe33678.tar.gz | |
crypto: ccp - Return doorbell status code as an argument
If the doorbell failed to ring we return -EIO, but the caller can't
determine why it failed. Pass the reason for the failure in an
argument for caller to investigate.
Suggested-by: Mark Hasemeyer <markhas@chromium.org>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Mark Hasemeyer <markhas@chromium.org>
Tested-by: Mark Hasemeyer <markhas@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/ccp/platform-access.c | 4 | ||||
| -rw-r--r-- | include/linux/psp-platform-access.h | 4 |
2 files changed, 5 insertions, 3 deletions
diff --git a/drivers/crypto/ccp/platform-access.c b/drivers/crypto/ccp/platform-access.c index 1cc154a1c6ab..48f59ae91692 100644 --- a/drivers/crypto/ccp/platform-access.c +++ b/drivers/crypto/ccp/platform-access.c @@ -132,7 +132,7 @@ unlock: } EXPORT_SYMBOL_GPL(psp_send_platform_access_msg); -int psp_ring_platform_doorbell(int msg) +int psp_ring_platform_doorbell(int msg, u32 *result) { struct psp_device *psp = psp_get_master_device(); struct psp_platform_access_device *pa_dev; @@ -164,6 +164,8 @@ int psp_ring_platform_doorbell(int msg) val = FIELD_GET(PSP_CMDRESP_STS, ioread32(cmd)); if (val) { + if (result) + *result = val; ret = -EIO; goto unlock; } diff --git a/include/linux/psp-platform-access.h b/include/linux/psp-platform-access.h index 89df4549fada..1b661341d8f3 100644 --- a/include/linux/psp-platform-access.h +++ b/include/linux/psp-platform-access.h @@ -45,9 +45,9 @@ int psp_send_platform_access_msg(enum psp_platform_access_msg, struct psp_reques * -%EBUSY: mailbox in recovery or in use * -%ENODEV: driver not bound with PSP device * -%ETIMEDOUT: request timed out - * -%EIO: unknown error (see kernel log) + * -%EIO: error will be stored in result argument */ -int psp_ring_platform_doorbell(int msg); +int psp_ring_platform_doorbell(int msg, u32 *result); /** * psp_check_platform_access_status() - Checks whether platform features is ready |