linux-kernel - [PATCH 3.12 39/91] usb: musb: core: fix order of arguments to ulpi write callback

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Message-Id: <1852f6690bdfa4ea260bbc1dc11f26f5f167de14.1452015822.git.jslaby@suse.cz>
Date:	Tue,  5 Jan 2016 18:46:23 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>, Felipe Balbi <balbi@...com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 39/91] usb: musb: core: fix order of arguments to ulpi write callback

From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

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

===============

commit 705e63d2b29c8bbf091119084544d353bda70393 upstream.

There is a bit of a mess in the order of arguments to the ulpi write
callback. There is

	int ulpi_write(struct ulpi *ulpi, u8 addr, u8 val)

in drivers/usb/common/ulpi.c;

	struct usb_phy_io_ops {
		...
		int (*write)(struct usb_phy *x, u32 val, u32 reg);
	}

in include/linux/usb/phy.h.

The callback registered by the musb driver has to comply to the latter,
but up to now had "offset" first which effectively made the function
broken for correct users. So flip the order and while at it also
switch to the parameter names of struct usb_phy_io_ops's write.

Fixes: ffb865b1e460 ("usb: musb: add ulpi access operations")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Signed-off-by: Felipe Balbi <balbi@...com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/usb/musb/musb_core.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 3a63ec105045..64f342f6ab3e 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -133,7 +133,7 @@ static inline struct musb *dev_to_musb(struct device *dev)
 /*-------------------------------------------------------------------------*/
 
 #ifndef CONFIG_BLACKFIN
-static int musb_ulpi_read(struct usb_phy *phy, u32 offset)
+static int musb_ulpi_read(struct usb_phy *phy, u32 reg)
 {
 	void __iomem *addr = phy->io_priv;
 	int	i = 0;
@@ -152,7 +152,7 @@ static int musb_ulpi_read(struct usb_phy *phy, u32 offset)
 	 * ULPICarKitControlDisableUTMI after clearing POWER_SUSPENDM.
 	 */
 
-	musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)offset);
+	musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)reg);
 	musb_writeb(addr, MUSB_ULPI_REG_CONTROL,
 			MUSB_ULPI_REG_REQ | MUSB_ULPI_RDN_WR);
 
@@ -177,7 +177,7 @@ out:
 	return ret;
 }
 
-static int musb_ulpi_write(struct usb_phy *phy, u32 offset, u32 data)
+static int musb_ulpi_write(struct usb_phy *phy, u32 val, u32 reg)
 {
 	void __iomem *addr = phy->io_priv;
 	int	i = 0;
@@ -192,8 +192,8 @@ static int musb_ulpi_write(struct usb_phy *phy, u32 offset, u32 data)
 	power &= ~MUSB_POWER_SUSPENDM;
 	musb_writeb(addr, MUSB_POWER, power);
 
-	musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)offset);
-	musb_writeb(addr, MUSB_ULPI_REG_DATA, (u8)data);
+	musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)reg);
+	musb_writeb(addr, MUSB_ULPI_REG_DATA, (u8)val);
 	musb_writeb(addr, MUSB_ULPI_REG_CONTROL, MUSB_ULPI_REG_REQ);
 
 	while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL)
-- 
2.6.4

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