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crypto: ccp - Return doorbell status code as an argument

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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>
This commit is contained in:
Mario Limonciello 2023-04-03 13:32:12 -05:00 committed by Herbert Xu
parent e0358dedff
commit a19c61b065
2 changed files with 5 additions and 3 deletions
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4
drivers/crypto/ccp/platform-access.c
View file

@ -132,7 +132,7 @@ int psp_send_platform_access_msg(enum psp_platform_access_msg msg,
}
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;
}

4
include/linux/psp-platform-access.h
View file

@ -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