linux-kernel - [PATCH 2/6] mfd: rtsx_usb: fix platform device-id collision

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Date:	Fri, 26 Sep 2014 12:55:29 +0200
From:	Johan Hovold <johan@...nel.org>
To:	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>
Cc:	Jiri Kosina <jkosina@...e.cz>, linux-input@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
	Johan Hovold <johan@...nel.org>
Subject: [PATCH 2/6] mfd: rtsx_usb: fix platform device-id collision

Hot-pluggable multi-function devices should use PLATFORM_DEVID_AUTO to
avoid name collisions on the platform bus.

This driver currently uses the USB-device address as an id. This makes
name collisions unlikely, but it could still happen if two devices are
connected to separate buses and gets assigned the same address.

Signed-off-by: Johan Hovold <johan@...nel.org>
---
 drivers/mfd/rtsx_usb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mfd/rtsx_usb.c b/drivers/mfd/rtsx_usb.c
index 71f387ce8cbd..78073e4b87e4 100644
--- a/drivers/mfd/rtsx_usb.c
+++ b/drivers/mfd/rtsx_usb.c
@@ -647,7 +647,7 @@ static int rtsx_usb_probe(struct usb_interface *intf,
 	/* initialize USB SG transfer timer */
 	setup_timer(&ucr->sg_timer, rtsx_usb_sg_timed_out, (unsigned long) ucr);
 
-	ret = mfd_add_devices(&intf->dev, usb_dev->devnum, rtsx_usb_cells,
+	ret = mfd_add_devices(&intf->dev, PLATFORM_DEVID_AUTO, rtsx_usb_cells,
 			ARRAY_SIZE(rtsx_usb_cells), NULL, 0, NULL);
 	if (ret)
 		goto out_init_fail;
-- 
1.8.5.5

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