[PATCH v2] tpm/ppi: remove impossible assertion in tpm_eval_dsm

[Aditya Pakki]

In tpm_eval_dsm, BUG_ON on ppi_handle is used as an assertion.
However, if ppi_handle is NULL, the kernel crashes. The patch
removes the unnecessary check.

Signed-off-by: Aditya Pakki <pakki001@xxxxxxx>
---
v1: replaced the recovery code to completely eliminate the check,
as suggested by Jason Gunthorpe.
---
 drivers/char/tpm/tpm_ppi.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c
index b2dab941cb7f..603f7806f9af 100644
--- a/drivers/char/tpm/tpm_ppi.c
+++ b/drivers/char/tpm/tpm_ppi.c
@@ -42,7 +42,6 @@ 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);
 	return acpi_evaluate_dsm_typed(ppi_handle, &tpm_ppi_guid,
 				       rev, func, argv4, type);
 }
-- 
2.20.1