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Commit dcc0967d authored by Chris Lew's avatar Chris Lew Committed by Andy Gross
Browse files

soc: qcom: smem: Read version from the smem header 



The SMEM header structure includes the version information. Read the
version directly from the header instead of getting an item from the
global heap.

Signed-off-by: default avatarChris Lew <clew@codeaurora.org>
Acked-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: default avatarAndy Gross <andy.gross@linaro.org>
parent a216000f

drivers/soc/qcom/smem.c

+8 −17
Original line number Diff line number Diff line
@@ -63,11 +63,10 @@ 
 */



/*

 * Item 3 of the global heap contains an array of versions for the various

 * software components in the SoC. We verify that the boot loader version is

 * what the expected version (SMEM_EXPECTED_VERSION) as a sanity check.

 * The version member of the smem header contains an array of versions for the

 * various software components in the SoC. We verify that the boot loader

 * version is a valid version as a sanity check.

 */

#define SMEM_ITEM_VERSION	3

#define SMEM_MASTER_SBL_VERSION_INDEX	7

#define SMEM_EXPECTED_VERSION		11
@@ -604,19 +603,11 @@ EXPORT_SYMBOL(qcom_smem_get_free_space); 


static int qcom_smem_get_sbl_version(struct qcom_smem *smem)

{

	struct smem_header *header;

	__le32 *versions;

	size_t size;



	versions = qcom_smem_get_global(smem, SMEM_ITEM_VERSION, &size);

	if (IS_ERR(versions)) {

		dev_err(smem->dev, "Unable to read the version item\n");

		return -ENOENT;

	}



	if (size < sizeof(unsigned) * SMEM_MASTER_SBL_VERSION_INDEX) {

		dev_err(smem->dev, "Version item is too small\n");

		return -EINVAL;

	}

	header = smem->regions[0].virt_base;

	versions = header->version;



	return le32_to_cpu(versions[SMEM_MASTER_SBL_VERSION_INDEX]);

}