From cf58e8e75229cb80b2b46afc98dc5ed53cd65ddf Mon Sep 17 00:00:00 2001 From: Oliver Neukum Date: Wed, 23 Sep 2020 15:43:41 +0200 Subject: [PATCH] Revert "USB: legousbtower: use usb_control_msg_recv()" This reverts commit be40c366416bf6ff74b25fd02e38cb6eaba497d1. The API has to be changed. Signed-off-by: Oliver Neukum Link: https://lore.kernel.org/r/20200923134348.23862-8-oneukum@suse.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/legousbtower.c | 60 ++++++++++++++++++++++++++++------------- 1 file changed, 41 insertions(+), 19 deletions(-) diff --git a/drivers/usb/misc/legousbtower.c b/drivers/usb/misc/legousbtower.c index c3583df..f922544 100644 --- a/drivers/usb/misc/legousbtower.c +++ b/drivers/usb/misc/legousbtower.c @@ -308,9 +308,15 @@ static int tower_open(struct inode *inode, struct file *file) int subminor; int retval = 0; struct usb_interface *interface; - struct tower_reset_reply reset_reply; + struct tower_reset_reply *reset_reply; int result; + reset_reply = kmalloc(sizeof(*reset_reply), GFP_KERNEL); + if (!reset_reply) { + retval = -ENOMEM; + goto exit; + } + nonseekable_open(inode, file); subminor = iminor(inode); @@ -341,11 +347,15 @@ static int tower_open(struct inode *inode, struct file *file) } /* reset the tower */ - result = usb_control_msg_recv(dev->udev, 0, - LEGO_USB_TOWER_REQUEST_RESET, - USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, - 0, 0, - &reset_reply, sizeof(reset_reply), 1000); + result = usb_control_msg(dev->udev, + usb_rcvctrlpipe(dev->udev, 0), + LEGO_USB_TOWER_REQUEST_RESET, + USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, + 0, + 0, + reset_reply, + sizeof(*reset_reply), + 1000); if (result < 0) { dev_err(&dev->udev->dev, "LEGO USB Tower reset control request failed\n"); @@ -384,6 +394,7 @@ unlock_exit: mutex_unlock(&dev->lock); exit: + kfree(reset_reply); return retval; } @@ -742,7 +753,7 @@ static int tower_probe(struct usb_interface *interface, const struct usb_device_ struct device *idev = &interface->dev; struct usb_device *udev = interface_to_usbdev(interface); struct lego_usb_tower *dev; - struct tower_get_version_reply get_version_reply; + struct tower_get_version_reply *get_version_reply = NULL; int retval = -ENOMEM; int result; @@ -787,25 +798,34 @@ static int tower_probe(struct usb_interface *interface, const struct usb_device_ dev->interrupt_in_interval = interrupt_in_interval ? interrupt_in_interval : dev->interrupt_in_endpoint->bInterval; dev->interrupt_out_interval = interrupt_out_interval ? interrupt_out_interval : dev->interrupt_out_endpoint->bInterval; + get_version_reply = kmalloc(sizeof(*get_version_reply), GFP_KERNEL); + if (!get_version_reply) { + retval = -ENOMEM; + goto error; + } + /* get the firmware version and log it */ - result = usb_control_msg_recv(udev, 0, - LEGO_USB_TOWER_REQUEST_GET_VERSION, - USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, - 0, - 0, - &get_version_reply, - sizeof(get_version_reply), - 1000); - if (!result) { + result = usb_control_msg(udev, + usb_rcvctrlpipe(udev, 0), + LEGO_USB_TOWER_REQUEST_GET_VERSION, + USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, + 0, + 0, + get_version_reply, + sizeof(*get_version_reply), + 1000); + if (result != sizeof(*get_version_reply)) { + if (result >= 0) + result = -EIO; dev_err(idev, "get version request failed: %d\n", result); retval = result; goto error; } dev_info(&interface->dev, "LEGO USB Tower firmware version is %d.%d build %d\n", - get_version_reply.major, - get_version_reply.minor, - le16_to_cpu(get_version_reply.build_no)); + get_version_reply->major, + get_version_reply->minor, + le16_to_cpu(get_version_reply->build_no)); /* we can register the device now, as it is ready */ usb_set_intfdata(interface, dev); @@ -824,9 +844,11 @@ static int tower_probe(struct usb_interface *interface, const struct usb_device_ USB_MAJOR, dev->minor); exit: + kfree(get_version_reply); return retval; error: + kfree(get_version_reply); tower_delete(dev); return retval; } -- 2.7.4