FAILED: patch "[PATCH] libnvdimm: fix clear length of nvdimm_forget_poison()" failed to apply to 4.10-stable tree

The patch below does not apply to the 4.10-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: Toshi Kani <[email protected]>
Date: Thu, 27 Apr 2017 16:57:05 -0600
Subject: [PATCH] libnvdimm: fix clear length of nvdimm_forget_poison()

ND_CMD_CLEAR_ERROR command returns 'clear_err.cleared', the length of error actually cleared, which may be smaller than its requested 'len'.

Change nvdimm_clear_poison() to call nvdimm_forget_poison() with 'clear_err.cleared' when this value is valid.

index d214ac44d111..43ddfd487c85 100644
@@ -219,7 +219,9 @@ long nvdimm_clear_poison(struct device *dev, phys_addr_t phys,
 	if (cmd_rc < 0)
 		return cmd_rc;
 
-	nvdimm_forget_poison(nvdimm_bus, phys, len);
+	if (clear_err.cleared > 0)
+		nvdimm_forget_poison(nvdimm_bus, phys, clear_err.cleared);
+
 	return clear_err.cleared;
 }
 EXPORT_SYMBOL_GPL(nvdimm_clear_poison);