[06/12] soc: qcom: smem: require order of host ids to match

Message ID	20180502011019.22812-7-elder@linaro.org
State	New
Headers	show Delivered-To: patch@linaro.org Received-SPF: pass (google.com: best guess record for domain of linux-arm-msm-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; 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 06/12] soc: qcom: smem: require order of host ids to match Date: Tue, 1 May 2018 20:10:13 -0500 Message-Id: <20180502011019.22812-7-elder@linaro.org> In-Reply-To: <20180502011019.22812-1-elder@linaro.org> References: <20180502011019.22812-1-elder@linaro.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk
Series	soc: qcom: smem: some refactoring \| expand [00/12] soc: qcom: smem: some refactoring [02/12] soc: qcom: smem: initialize region struct only when successful [05/12] soc: qcom: smem: verify both host ids in partition header [06/12] soc: qcom: smem: require order of host ids to match [07/12] soc: qcom: smem: introduce qcom_smem_partition_header() [12/12] soc: qcom: smem: a few last cleanups

Message ID

20180502011019.22812-7-elder@linaro.org

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New

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Received-SPF: pass (google.com: best guess record for domain of
	linux-arm-msm-owner@vger.kernel.org designates 209.132.180.67
	as permitted sender) client-ip=209.132.180.67; 
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 06/12] soc: qcom: smem: require order of host ids to match
Date: Tue,  1 May 2018 20:10:13 -0500
Message-Id: <20180502011019.22812-7-elder@linaro.org>
In-Reply-To: <20180502011019.22812-1-elder@linaro.org>
References: <20180502011019.22812-1-elder@linaro.org>
Sender: linux-arm-msm-owner@vger.kernel.org
Precedence: bulk

Series

soc: qcom: smem: some refactoring | expand

Commit Message

Alex Elder May 2, 2018, 1:10 a.m. UTC

In qcom_smem_enumerate_partitions(), we find all partitions that
have a given local host id in either its host0 or its host1 field
in the partition table entry.  We then verify that the header
structure at the start of each partition also contains the same two
host ids as is found in the table of contents.

There is no requirement that the order of the two host ids be the
same in the table of contents and in the partition header.

This patch changes that, requiring host0 to in the partition table
entry to equal host0 in the partition header structure (and similar
for the host1 values).

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

---
 drivers/soc/qcom/smem.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

-- 
2.14.1

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diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c
index 6931602d9a9e..9e20c6b1b4c2 100644
--- a/drivers/soc/qcom/smem.c
+++ b/drivers/soc/qcom/smem.c
@@ -837,9 +837,6 @@  static int qcom_smem_enumerate_partitions(struct qcom_smem *smem,
 		}
 
 		header = smem->regions[0].virt_base + le32_to_cpu(entry->offset);
-		host0 = le16_to_cpu(header->host0);
-		host1 = le16_to_cpu(header->host1);
-
 		if (memcmp(header->magic, SMEM_PART_MAGIC,
 			    sizeof(header->magic))) {
 			dev_err(smem->dev,
@@ -847,15 +844,10 @@  static int qcom_smem_enumerate_partitions(struct qcom_smem *smem,
 			return -EINVAL;
 		}
 
-		if (host0 != local_host && host1 != local_host) {
+		if (host0 != le16_to_cpu(header->host0) ||
+				host1 != le16_to_cpu(header->host1)) {
 			dev_err(smem->dev,
-				"Partition %d hosts are invalid\n", i);
-			return -EINVAL;
-		}
-
-		if (host0 != remote_host && host1 != remote_host) {
-			dev_err(smem->dev,
-				"Partition %d hosts are invalid\n", i);
+				"Partition %d hosts don't match\n", i);
 			return -EINVAL;
 		}

[06/12] soc: qcom: smem: require order of host ids to match

Commit Message

Patch