lkml.org 
[lkml]   [2019]   [Dec]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] tpm/ppi: replace assertion code with recovery in tpm_eval_dsm
Date
In tpm_eval_dsm, BUG_ON on ppi_handle is used as an assertion.
By returning NULL to the callers, instead of crashing, the error
can be better handled.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
---
drivers/char/tpm/tpm_ppi.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c
index b2dab941cb7f..4b6f6a9c0b48 100644
--- a/drivers/char/tpm/tpm_ppi.c
+++ b/drivers/char/tpm/tpm_ppi.c
@@ -42,7 +42,9 @@ static inline union acpi_object *
tpm_eval_dsm(acpi_handle ppi_handle, int func, acpi_object_type type,
union acpi_object *argv4, u64 rev)
{
- BUG_ON(!ppi_handle);
+ if (!ppi_handle)
+ return NULL;
+
return acpi_evaluate_dsm_typed(ppi_handle, &tpm_ppi_guid,
rev, func, argv4, type);
}
--
2.20.1
\
 
 \ /
  Last update: 2019-12-15 19:23    [W:0.044 / U:2.212 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site