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Commit 28965e17 authored by Oliver Neukum's avatar Oliver Neukum Committed by Greg Kroah-Hartman
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cdc-wdm: unify error handling in write 



This makes sure the error handling path is the same for
all error conditions, thus reducing code duplication.

Signed-off-by: default avatarOliver Neukum <oneukum@suse.de&gt;0>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4132cd02

drivers/usb/class/cdc-wdm.c

+16 −15
Original line number Original line Diff line number Diff line
@@ -349,30 +349,25 @@ static ssize_t wdm_write 




	r = copy_from_user(buf, buffer, count);

	r = copy_from_user(buf, buffer, count);

	if (r > 0) {

	if (r > 0) {

		kfree(buf);

		rv = -EFAULT;

		rv = -EFAULT;

		goto outnl;

		goto out_free_mem;

	}

	}





	/* concurrent writes and disconnect */

	/* concurrent writes and disconnect */

	r = mutex_lock_interruptible(&desc->wlock);

	r = mutex_lock_interruptible(&desc->wlock);

	rv = -ERESTARTSYS;

	rv = -ERESTARTSYS;

	if (r) {

	if (r)

		kfree(buf);

		goto out_free_mem;

		goto outnl;

	}





	if (test_bit(WDM_DISCONNECTING, &desc->flags)) {

	if (test_bit(WDM_DISCONNECTING, &desc->flags)) {

		kfree(buf);

		rv = -ENODEV;

		rv = -ENODEV;

		goto outnp;

		goto out_free_mem_lock;

	}

	}





	r = usb_autopm_get_interface(desc->intf);

	r = usb_autopm_get_interface(desc->intf);

	if (r < 0) {

	if (r < 0) {

		kfree(buf);

		rv = usb_translate_errors(r);

		rv = usb_translate_errors(r);

		goto outnp;

		goto out_free_mem_lock;

	}

	}





	if (!(file->f_flags & O_NONBLOCK))

	if (!(file->f_flags & O_NONBLOCK))
@@ -386,9 +381,8 @@ static ssize_t wdm_write 
		r = -EIO;

		r = -EIO;





	if (r < 0) {

	if (r < 0) {

		kfree(buf);

		rv = r;

		rv = r;

		goto out;

		goto out_free_mem_pm;

	}

	}





	req = desc->orq;

	req = desc->orq;
@@ -415,21 +409,28 @@ static ssize_t wdm_write 




	rv = usb_submit_urb(desc->command, GFP_KERNEL);

	rv = usb_submit_urb(desc->command, GFP_KERNEL);

	if (rv < 0) {

	if (rv < 0) {

		kfree(buf);

		desc->outbuf = NULL;

		desc->outbuf = NULL;

		clear_bit(WDM_IN_USE, &desc->flags);

		clear_bit(WDM_IN_USE, &desc->flags);

		dev_err(&desc->intf->dev, "Tx URB error: %d\n", rv);

		dev_err(&desc->intf->dev, "Tx URB error: %d\n", rv);

		rv = usb_translate_errors(rv);

		rv = usb_translate_errors(rv);

		goto out_free_mem_pm;

	} else {

	} else {

		dev_dbg(&desc->intf->dev, "Tx URB has been submitted index=%d",

		dev_dbg(&desc->intf->dev, "Tx URB has been submitted index=%d",

			req->wIndex);

			req->wIndex);

	}

	}

out:



	usb_autopm_put_interface(desc->intf);

	usb_autopm_put_interface(desc->intf);

outnp:

	mutex_unlock(&desc->wlock);

	mutex_unlock(&desc->wlock);

outnl:

outnl:

	return rv < 0 ? rv : count;

	return rv < 0 ? rv : count;



out_free_mem_pm:

	usb_autopm_put_interface(desc->intf);

out_free_mem_lock:

	mutex_unlock(&desc->wlock);

out_free_mem:

	kfree(buf);

	return rv;

}

}





/*

/*