linux-kernel - [PATCH 4.9 138/145] idle: i7300: add PCI dependency

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Message-Id: <20180223170742.562665464@linuxfoundation.org>
Date:   Fri, 23 Feb 2018 19:27:24 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>
Subject: [PATCH 4.9 138/145] idle: i7300: add PCI dependency

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

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

GCC correctly points out an uninitialized variable use when CONFIG_PCI is disabled.

drivers/idle/i7300_idle.c: In function 'i7300_idle_notifier':
include/asm-generic/bug.h:119:5: error: 'got_ctl' may be used uninitialized in this function [-Werror=maybe-uninitialized]
  if (unlikely(__ret_warn_once && !__warned)) {  \
     ^
drivers/idle/i7300_idle.c:415:5: note: 'got_ctl' was declared here
  u8 got_ctl;
     ^~~~~~~

The driver no longer exists in later kernels, so this patch only appplies to
linux-4.9.y and earlier.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/idle/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/idle/Kconfig
+++ b/drivers/idle/Kconfig
@@ -17,6 +17,7 @@ config I7300_IDLE_IOAT_CHANNEL
 
 config I7300_IDLE
 	tristate "Intel chipset idle memory power saving driver"
+	depends on PCI
 	select I7300_IDLE_IOAT_CHANNEL
 	help
 	  Enable memory power savings when idle with certain Intel server