[PATCH 07/18] dbtr: Check for invalid and unsupported triggers in update

[Nicholas Piggin]

Update triggers does not check supported or valid, so it permits tdata1.m
and tdata1.dmode bits being set.

Fix update to test that triggers are valid and supported.

Signed-off-by: Nicholas Piggin <npiggin at gmail.com>
---
 lib/sbi/sbi_dbtr.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/lib/sbi/sbi_dbtr.c b/lib/sbi/sbi_dbtr.c
index d2845fec..3925170f 100644
--- a/lib/sbi/sbi_dbtr.c
+++ b/lib/sbi/sbi_dbtr.c
@@ -749,7 +749,7 @@ int sbi_dbtr_update_trig(unsigned long smode,
 
 	/* Check requested triggers configuration */
 	for_each_trig_entry(shmem_base, trig_count, typeof(*entry), entry) {
-		unsigned long trig_idx, tdata1;
+		unsigned long trig_idx, tdata1, type;
 
 		trig_idx = entry->id.idx;
 		if (trig_idx >= hs->total_trigs) {
@@ -769,7 +769,23 @@ int sbi_dbtr_update_trig(unsigned long smode,
 
 		recv = (struct sbi_dbtr_data_msg *)(&entry->data);
 		tdata1 = lle_to_cpu(recv->tdata1);
-		if (TDATA1_GET_TYPE(tdata1) != TDATA1_GET_TYPE(trig->tdata1)) {
+		type = TDATA1_GET_TYPE(tdata1);
+
+		if (!dbtr_trigger_supported(type, tdata1)) {
+			*out = _idx;
+			sbi_hart_protection_unmap_range((unsigned long)shmem_base,
+							trig_count * sizeof(*entry));
+			return SBI_ERR_NOT_SUPPORTED;
+		}
+
+		if (!dbtr_trigger_valid(type, tdata1)) {
+			*out = _idx;
+			sbi_hart_protection_unmap_range((unsigned long)shmem_base,
+							trig_count * sizeof(*entry));
+			return SBI_ERR_INVALID_PARAM;
+		}
+
+		if (type != TDATA1_GET_TYPE(trig->tdata1)) {
 			*out = _idx;
 			sbi_hart_protection_unmap_range((unsigned long)shmem_base,
 							trig_count * sizeof(*entry));
-- 
2.51.0