[03/12] soc: qcom: smem: always ignore partitions with 0 offset or size

Message ID 20180502011019.22812-4-elder@linaro.org
State Superseded
Headers show
Series
  • [01/12] soc: qcom: smem: rename variable in qcom_smem_get_global()
Related show

Commit Message

Alex Elder May 2, 2018, 1:10 a.m.
In qcom_smem_enumerate_partitions(), any partition table entry
having a zero offset or size field is ignored.  Move those checks
earlier in the loop, because there's no sense in examining the
host fields for those entries.

Add the same checks in qcom_smem_set_global_partition(), so the
scan for the global partition skips over these invalid entries.
This allows a later check for zero size or offset once the global
entry is found to be eliminated.

Signed-off-by: Alex Elder <elder@linaro.org>

---
 drivers/soc/qcom/smem.c | 23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

-- 
2.14.1

Patch

diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c
index d8008bf480a4..83ba549cfea0 100644
--- a/drivers/soc/qcom/smem.c
+++ b/drivers/soc/qcom/smem.c
@@ -742,9 +742,13 @@  static int qcom_smem_set_global_partition(struct qcom_smem *smem)
 
 	for (i = 0; i < le32_to_cpu(ptable->num_entries); i++) {
 		entry = &ptable->entry[i];
+		if (!le32_to_cpu(entry->offset))
+			continue;
+		if (!le32_to_cpu(entry->size))
+			continue;
+
 		host0 = le16_to_cpu(entry->host0);
 		host1 = le16_to_cpu(entry->host1);
-
 		if (host0 == SMEM_GLOBAL_HOST && host0 == host1) {
 			found = true;
 			break;
@@ -756,11 +760,6 @@  static int qcom_smem_set_global_partition(struct qcom_smem *smem)
 		return -EINVAL;
 	}
 
-	if (!le32_to_cpu(entry->offset) || !le32_to_cpu(entry->size)) {
-		dev_err(smem->dev, "Invalid entry for global partition\n");
-		return -EINVAL;
-	}
-
 	header = smem->regions[0].virt_base + le32_to_cpu(entry->offset);
 	host0 = le16_to_cpu(header->host0);
 	host1 = le16_to_cpu(header->host1);
@@ -809,18 +808,16 @@  static int qcom_smem_enumerate_partitions(struct qcom_smem *smem,
 
 	for (i = 0; i < le32_to_cpu(ptable->num_entries); i++) {
 		entry = &ptable->entry[i];
+		if (!le32_to_cpu(entry->offset))
+			continue;
+		if (!le32_to_cpu(entry->size))
+			continue;
+
 		host0 = le16_to_cpu(entry->host0);
 		host1 = le16_to_cpu(entry->host1);
-
 		if (host0 != local_host && host1 != local_host)
 			continue;
 
-		if (!le32_to_cpu(entry->offset))
-			continue;
-
-		if (!le32_to_cpu(entry->size))
-			continue;
-
 		if (host0 == local_host)
 			remote_host = host1;
 		else