FAILED: patch "[PATCH] uio_hv_generic: Fix another memory leak in error handling" failed to apply to 5.4-stable tree

The patch below does not apply to the 5.4-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 0b0226be3a52dadd965644bc52a807961c2c26df Mon Sep 17 00:00:00 2001
From: Christophe JAILLET <[email protected]>
Date: Sun, 9 May 2021 09:13:12 +0200
Subject: [PATCH] uio_hv_generic: Fix another memory leak in error handling
paths

Memory allocated by 'vmbus_alloc_ring()' at the beginning of the probe function is never freed in the error handling path.

Add the missing 'vmbus_free_ring()' call.

Note that it is already freed in the .remove function.

index eebc399f2cc7..652fe2547587 100644
@@ -291,7 +291,7 @@ hv_uio_probe(struct hv_device *dev,
 	pdata->recv_buf = vzalloc(RECV_BUFFER_SIZE);
 	if (pdata->recv_buf == NULL) {
 		ret = -ENOMEM;
-		goto fail_close;
+		goto fail_free_ring;
 	}
 
 	ret = vmbus_establish_gpadl(channel, pdata->recv_buf,

@@ -351,6 +351,8 @@ hv_uio_probe(struct hv_device *dev,
 
 fail_close:
 	hv_uio_cleanup(dev, pdata);
+fail_free_ring:
+	vmbus_free_ring(dev->channel);
 
 	return ret;
 }