[PATCH] platform/x86/intel/tpmi: Use 32 bit aligned address for debugfs mem write

[Srinivas Pandruvada]

The memory write feature supports 32-bit writes to any TPMI offset.
However, future hardware generations may not allow writes to non-32-bit
aligned addresses due to hardware optimizations.

Since all TPMI addresses are 64-bit aligned and correspond to 64-bit
registers, enforce 32-bit alignment for write operations.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
---
 drivers/platform/x86/intel/vsec_tpmi.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/platform/x86/intel/vsec_tpmi.c b/drivers/platform/x86/intel/vsec_tpmi.c
index 98846e88d3d0..b70232d8ba58 100644
--- a/drivers/platform/x86/intel/vsec_tpmi.c
+++ b/drivers/platform/x86/intel/vsec_tpmi.c
@@ -479,6 +479,9 @@ static ssize_t mem_write(struct file *file, const char __user *userbuf, size_t l
 	addr = array[2];
 	value = array[3];
 
+	if (addr % sizeof(u32))
+		return -EINVAL;
+
 	if (punit >= pfs->pfs_header.num_entries) {
 		ret = -EINVAL;
 		goto exit_write;
-- 
2.52.0