luck/tmp_suning_uos_patched
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

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

Browse Source 
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: Chris Lew <clew@codeaurora.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
This commit is contained in:
Chris Lew 2017-10-11 14:29:07 -07:00 committed by Andy Gross
parent a216000f01
commit dcc0967dd7
1 changed files with 8 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/soc/qcom/smem.c
View File

@ -63,13 +63,12 @@
*/
/*
* 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
#define SMEM_MASTER_SBL_VERSION_INDEX 7
#define SMEM_EXPECTED_VERSION 11
/*
* The first 8 items are only to be allocated by the boot loader while
@ -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]);
}