Merge tag 'cxl-fixes-6.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl

Pull cxl fix from Dave Jiang:

 - Fix potential payload size confusion in cxl_mem_get_poison()

* tag 'cxl-fixes-6.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl:
  cxl/core: Fix potential payload size confusion in cxl_mem_get_poison()

1 files changed, 17 insertions, 21 deletions

diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
index f0f54aeccc872b..65185c9fa00134 100644
--- a/drivers/cxl/core/mbox.c
+++ b/drivers/cxl/core/mbox.c
@@ -946,25 +946,22 @@ static void cxl_mem_get_records_log(struct cxl_memdev_state *mds,
 	struct cxl_memdev *cxlmd = mds->cxlds.cxlmd;
 	struct device *dev = mds->cxlds.dev;
 	struct cxl_get_event_payload *payload;
-	struct cxl_mbox_cmd mbox_cmd;
 	u8 log_type = type;
 	u16 nr_rec;
 
 	mutex_lock(&mds->event.log_lock);
 	payload = mds->event.buf;
 
-	mbox_cmd = (struct cxl_mbox_cmd) {
-		.opcode = CXL_MBOX_OP_GET_EVENT_RECORD,
-		.payload_in = &log_type,
-		.size_in = sizeof(log_type),
-		.payload_out = payload,
-		.min_out = struct_size(payload, records, 0),
-	};
-
 	do {
 		int rc, i;
-
-		mbox_cmd.size_out = mds->payload_size;
+		struct cxl_mbox_cmd mbox_cmd = (struct cxl_mbox_cmd) {
+			.opcode = CXL_MBOX_OP_GET_EVENT_RECORD,
+			.payload_in = &log_type,
+			.size_in = sizeof(log_type),
+			.payload_out = payload,
+			.size_out = mds->payload_size,
+			.min_out = struct_size(payload, records, 0),
+		};
 
 		rc = cxl_internal_send_cmd(mds, &mbox_cmd);
 		if (rc) {
@@ -1297,7 +1294,6 @@ int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len,
 	struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds);
 	struct cxl_mbox_poison_out *po;
 	struct cxl_mbox_poison_in pi;
-	struct cxl_mbox_cmd mbox_cmd;
 	int nr_records = 0;
 	int rc;
 
@@ -1309,16 +1305,16 @@ int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len,
 	pi.offset = cpu_to_le64(offset);
 	pi.length = cpu_to_le64(len / CXL_POISON_LEN_MULT);
 
-	mbox_cmd = (struct cxl_mbox_cmd) {
-		.opcode = CXL_MBOX_OP_GET_POISON,
-		.size_in = sizeof(pi),
-		.payload_in = &pi,
-		.size_out = mds->payload_size,
-		.payload_out = po,
-		.min_out = struct_size(po, record, 0),
-	};
-
 	do {
+		struct cxl_mbox_cmd mbox_cmd = (struct cxl_mbox_cmd){
+			.opcode = CXL_MBOX_OP_GET_POISON,
+			.size_in = sizeof(pi),
+			.payload_in = &pi,
+			.size_out = mds->payload_size,
+			.payload_out = po,
+			.min_out = struct_size(po, record, 0),
+		};
+
 		rc = cxl_internal_send_cmd(mds, &mbox_cmd);
 		if (rc)
 			break;