This makes sure the error handling path is the same for
all error conditions, thus reducing code duplication.
Signed-off-by: Oliver Neukum <oneu...@suse.de>0
---
drivers/usb/class/cdc-wdm.c | 31 ++++++++++++++++---------------
1 file changed, 16 insertions(+), 15 deletions(-)
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 21850a9..b574f6d 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -349,30 +349,25 @@ static ssize_t wdm_write
r = copy_from_user(buf, buffer, count);
if (r > 0) {
- kfree(buf);
rv = -EFAULT;
- goto outnl;
+ goto out_free_mem;
}
/* concurrent writes and disconnect */
r = mutex_lock_interruptible(&desc->wlock);
rv = -ERESTARTSYS;
- if (r) {
- kfree(buf);
- goto outnl;
- }
+ if (r)
+ goto out_free_mem;
if (test_bit(WDM_DISCONNECTING, &desc->flags)) {
- kfree(buf);
rv = -ENODEV;
- goto outnp;
+ goto out_free_mem_lock;
}
r = usb_autopm_get_interface(desc->intf);
if (r < 0) {
- kfree(buf);
rv = usb_translate_errors(r);
- goto outnp;
+ goto out_free_mem_lock;
}
if (!(file->f_flags & O_NONBLOCK))
@@ -386,9 +381,8 @@ static ssize_t wdm_write
r = -EIO;
if (r < 0) {
- kfree(buf);
rv = r;
- goto out;
+ goto out_free_mem_pm;
}
req = desc->orq;
@@ -415,21 +409,28 @@ static ssize_t wdm_write
rv = usb_submit_urb(desc->command, GFP_KERNEL);
if (rv < 0) {
- kfree(buf);
desc->outbuf = NULL;
clear_bit(WDM_IN_USE, &desc->flags);
dev_err(&desc->intf->dev, "Tx URB error: %d\n", rv);
rv = usb_translate_errors(rv);
+ goto out_free_mem_pm;
} else {
dev_dbg(&desc->intf->dev, "Tx URB has been submitted index=%d",
req->wIndex);
}
-out:
+
usb_autopm_put_interface(desc->intf);
-outnp:
mutex_unlock(&desc->wlock);
outnl:
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;
}
/*
--
2.1.4
--
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