linux-kernel - [PATCH] cxl: fix CONFIG_FW

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Message-Id: <20230703112928.332321-1-arnd@kernel.org>
Date:   Mon,  3 Jul 2023 13:29:13 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Alison Schofield <alison.schofield@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Ira Weiny <ira.weiny@...el.com>,
        Ben Widawsky <bwidawsk@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Dave Jiang <dave.jiang@...el.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Randy Dunlap <rdunlap@...radead.org>,
        linux-cxl@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] cxl: fix CONFIG_FW_LOADER dependency

From: Arnd Bergmann <arnd@...db.de>

When FW_LOADER is disabled, cxl fails to link:

arm-linux-gnueabi-ld: drivers/cxl/core/memdev.o: in function `cxl_memdev_setup_fw_upload':
memdev.c:(.text+0x90e): undefined reference to `firmware_upload_register'
memdev.c:(.text+0x93c): undefined reference to `firmware_upload_unregister'

In order to use the firmware_upload_register() function, both FW_LOADER
and FW_UPLOAD have to be enabled, which is a bit confusing. In addition,
the dependency is on the wrong symbol, as the caller is part of the
cxl_core.ko module, not the cxl_mem.ko module.

Fixes: 9521875bbe005 ("cxl: add a firmware update mechanism using the sysfs firmware loader")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/cxl/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/cxl/Kconfig b/drivers/cxl/Kconfig
index fcbf8295fde37..8ea1d340e4385 100644
--- a/drivers/cxl/Kconfig
+++ b/drivers/cxl/Kconfig
@@ -2,6 +2,8 @@
 menuconfig CXL_BUS
 	tristate "CXL (Compute Express Link) Devices Support"
 	depends on PCI
+	select FW_LOADER
+	select FW_UPLOAD
 	select PCI_DOE
 	help
 	  CXL is a bus that is electrically compatible with PCI Express, but
@@ -82,7 +84,6 @@ config CXL_PMEM
 config CXL_MEM
 	tristate "CXL: Memory Expansion"
 	depends on CXL_PCI
-	select FW_UPLOAD
 	default CXL_BUS
 	help
 	  The CXL.mem protocol allows a device to act as a provider of "System
-- 
2.39.2