From 2148ffafdb0b94e382b6457ab062673cfd41b7ad Mon Sep 17 00:00:00 2001
From: Gleb Chesnokov <gleb.chesnokov@scst.dev>
Date: Mon, 19 Oct 2026 16:46:13 +0300
Subject: [PATCH] qla2x00t-32gbit: Use 64-bit max LUNs when supported

The Linux 3.10 backport selected uint unconditionally for ql2xmaxlun,
limiting the module parameter to 32 bits even on current kernels.

Select uint only when param_check_ullong is absent from the kernel's
module parameter API. Otherwise retain the upstream uint64_t/ullong type.
Use the same feature check for the extern declaration so all driver
translation units agree, including vendor kernels with this API backported.

The default value and existing 16-bit limit for older HBAs are unchanged.
---
 qla2x00t-32gbit/qla_gbl.h | 2 +-
 qla2x00t-32gbit/qla_os.c  | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/qla2x00t-32gbit/qla_gbl.h b/qla2x00t-32gbit/qla_gbl.h
index ccd6497e6..d6f4faad3 100644
--- a/qla2x00t-32gbit/qla_gbl.h
+++ b/qla2x00t-32gbit/qla_gbl.h
@@ -176,7 +176,7 @@ extern int ql2xgffidenable;
 extern int ql2xenabledif;
 extern int ql2xenablehba_err_chk;
 extern int ql2xdontresethba;
-#if 1
+#ifndef param_check_ullong
 extern uint ql2xmaxlun;
 #else
 extern uint64_t ql2xmaxlun;
diff --git a/qla2x00t-32gbit/qla_os.c b/qla2x00t-32gbit/qla_os.c
index fd81b9e11..4d7d2a33c 100644
--- a/qla2x00t-32gbit/qla_os.c
+++ b/qla2x00t-32gbit/qla_os.c
@@ -243,7 +243,8 @@ MODULE_PARM_DESC(ql2xdontresethba,
 		" 0 (Default) -- Reset on failure.\n"
 		" 1 -- Do not reset on failure.\n");
 
-#if 1
+/* Older kernels may lack the ullong module parameter type. */
+#ifndef param_check_ullong
 uint ql2xmaxlun = MAX_LUNS;
 module_param(ql2xmaxlun, uint, S_IRUGO);
 #else