From: Alex Elder <elder@linaro.org>
To: andy.gross@linaro.org
Cc: clew@codeaurora.org, aneela@codeaurora.org,
david.brown@linaro.org, linux-arm-msm@vger.kernel.org,
linux-soc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 03/12] soc: qcom: smem: always ignore partitions with 0 offset or size
Date: Tue, 1 May 2018 20:10:10 -0500 [thread overview]
Message-ID: <20180502011019.22812-4-elder@linaro.org> (raw)
In-Reply-To: <20180502011019.22812-1-elder@linaro.org>
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(-)
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
--
2.14.1
next prev parent reply other threads:[~2018-05-02 1:10 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-02 1:10 [PATCH 00/12] soc: qcom: smem: some refactoring Alex Elder
2018-05-02 1:10 ` [PATCH 01/12] soc: qcom: smem: rename variable in qcom_smem_get_global() Alex Elder
2018-05-02 1:10 ` [PATCH 02/12] soc: qcom: smem: initialize region struct only when successful Alex Elder
2018-05-02 1:10 ` Alex Elder [this message]
2018-05-02 1:10 ` [PATCH 04/12] soc: qcom: smem: small refactor in qcom_smem_enumerate_partitions() Alex Elder
2018-05-02 1:10 ` [PATCH 05/12] soc: qcom: smem: verify both host ids in partition header Alex Elder
2018-05-02 1:10 ` [PATCH 06/12] soc: qcom: smem: require order of host ids to match Alex Elder
2018-05-02 1:10 ` [PATCH 07/12] soc: qcom: smem: introduce qcom_smem_partition_header() Alex Elder
2018-05-02 1:10 ` [PATCH 08/12] soc: qcom: smem: verify partition header size Alex Elder
2018-05-02 1:10 ` [PATCH 09/12] soc: qcom: smem: verify partition offset_free_uncached Alex Elder
2018-05-02 1:10 ` [PATCH 10/12] soc: qcom: smem: small change in global entry loop Alex Elder
2018-05-02 1:10 ` [PATCH 11/12] soc: qcom: smem: verify partition host ids match Alex Elder
2018-05-02 1:10 ` [PATCH 12/12] soc: qcom: smem: a few last cleanups Alex Elder
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