linux-kernel - [PATCH v2 3/3] i2c: designware: Cleanup bus lock handling

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20181011102627.7418-4-hdegoede@redhat.com>
Date:   Thu, 11 Oct 2018 12:26:27 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>
Cc:     Hans de Goede <hdegoede@...hat.com>, linux-i2c@...r.kernel.org,
        linux-acpi@...r.kernel.org, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 3/3] i2c: designware: Cleanup bus lock handling

Now that most of the special Bay- / Cherry-Trail bus lock handling has
been moved to the iosf_mbi code we can simplify the remaining code a bit.

Signed-off-by: Hans de Goede <hdegoede@...hat.com>
---
 drivers/i2c/busses/i2c-designware-baytrail.c | 18 ++----------------
 drivers/i2c/busses/i2c-designware-common.c   |  4 ++--
 drivers/i2c/busses/i2c-designware-core.h     |  9 ++-------
 drivers/i2c/busses/i2c-designware-platdrv.c  |  2 --
 4 files changed, 6 insertions(+), 27 deletions(-)

diff --git a/drivers/i2c/busses/i2c-designware-baytrail.c b/drivers/i2c/busses/i2c-designware-baytrail.c
index 8c84fa0b0384..33da07d64494 100644
--- a/drivers/i2c/busses/i2c-designware-baytrail.c
+++ b/drivers/i2c/busses/i2c-designware-baytrail.c
@@ -12,16 +12,6 @@
 
 #include "i2c-designware-core.h"
 
-static int baytrail_i2c_acquire(struct dw_i2c_dev *dev)
-{
-	return iosf_mbi_block_punit_i2c_access();
-}
-
-static void baytrail_i2c_release(struct dw_i2c_dev *dev)
-{
-	iosf_mbi_unblock_punit_i2c_access();
-}
-
 int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev)
 {
 	acpi_status status;
@@ -46,13 +36,9 @@ int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev)
 		return -EPROBE_DEFER;
 
 	dev_info(dev->dev, "I2C bus managed by PUNIT\n");
-	dev->acquire_lock = baytrail_i2c_acquire;
-	dev->release_lock = baytrail_i2c_release;
+	dev->acquire_lock = iosf_mbi_block_punit_i2c_access;
+	dev->release_lock = iosf_mbi_unblock_punit_i2c_access;
 	dev->shared_with_punit = true;
 
 	return 0;
 }
-
-void i2c_dw_remove_lock_support(struct dw_i2c_dev *dev)
-{
-}
diff --git a/drivers/i2c/busses/i2c-designware-common.c b/drivers/i2c/busses/i2c-designware-common.c
index 36271cd75342..a4730111d290 100644
--- a/drivers/i2c/busses/i2c-designware-common.c
+++ b/drivers/i2c/busses/i2c-designware-common.c
@@ -269,7 +269,7 @@ int i2c_dw_acquire_lock(struct dw_i2c_dev *dev)
 	if (!dev->acquire_lock)
 		return 0;
 
-	ret = dev->acquire_lock(dev);
+	ret = dev->acquire_lock();
 	if (!ret)
 		return 0;
 
@@ -281,7 +281,7 @@ int i2c_dw_acquire_lock(struct dw_i2c_dev *dev)
 void i2c_dw_release_lock(struct dw_i2c_dev *dev)
 {
 	if (dev->release_lock)
-		dev->release_lock(dev);
+		dev->release_lock();
 }
 
 /*
diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h
index 9ec8394f4787..b4a0b2b99a78 100644
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/drivers/i2c/busses/i2c-designware-core.h
@@ -10,7 +10,6 @@
  */
 
 #include <linux/i2c.h>
-#include <linux/pm_qos.h>
 
 #define DW_IC_DEFAULT_FUNCTIONALITY (I2C_FUNC_I2C |			\
 					I2C_FUNC_SMBUS_BYTE |		\
@@ -209,7 +208,6 @@
  * @fp_lcnt: fast plus LCNT value
  * @hs_hcnt: high speed HCNT value
  * @hs_lcnt: high speed LCNT value
- * @pm_qos: pm_qos_request used while holding a hardware lock on the bus
  * @acquire_lock: function to acquire a hardware lock on the bus
  * @release_lock: function to release a hardware lock on the bus
  * @shared_with_punit: true if this bus is shared with the SoCs PUNIT
@@ -263,9 +261,8 @@ struct dw_i2c_dev {
 	u16			fp_lcnt;
 	u16			hs_hcnt;
 	u16			hs_lcnt;
-	struct pm_qos_request	pm_qos;
-	int			(*acquire_lock)(struct dw_i2c_dev *dev);
-	void			(*release_lock)(struct dw_i2c_dev *dev);
+	int			(*acquire_lock)(void);
+	void			(*release_lock)(void);
 	bool			shared_with_punit;
 	void			(*disable)(struct dw_i2c_dev *dev);
 	void			(*disable_int)(struct dw_i2c_dev *dev);
@@ -322,8 +319,6 @@ static inline int i2c_dw_probe_slave(struct dw_i2c_dev *dev) { return -EINVAL; }
 
 #if IS_ENABLED(CONFIG_I2C_DESIGNWARE_BAYTRAIL)
 extern int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev);
-extern void i2c_dw_remove_lock_support(struct dw_i2c_dev *dev);
 #else
 static inline int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev) { return 0; }
-static inline void i2c_dw_remove_lock_support(struct dw_i2c_dev *dev) {}
 #endif
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 997bbb3d925f..9eaac3be1f63 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -418,8 +418,6 @@ static int dw_i2c_plat_remove(struct platform_device *pdev)
 	if (!IS_ERR_OR_NULL(dev->rst))
 		reset_control_assert(dev->rst);
 
-	i2c_dw_remove_lock_support(dev);
-
 	return 0;
 }
 
-- 
2.19.0