From: Sanath Kumar <sanath.s.kumar@oracle.com>
Date: Tue, 23 May 2017 01:48:02 +0000 (-0500)
Subject: sparc64: Fix an error code returned by a DAX ioctl
X-Git-Tag: v4.1.12-104.0.20170618_1145~241
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=4a6a3b533d573809f5f772ec7c849c3da5383908;p=users%2Fjedix%2Flinux-maple.git

sparc64: Fix an error code returned by a DAX ioctl

Orabug: 26132331

IOCTL for ccb submission failed due to get_user_pages error should
return EFAULT instead of EPERM. This was a regression introduced by a
prior patch that cleaned up a few functions in this code path.

Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: Sanath Kumar <sanath.s.kumar@oracle.com>
---

diff --git a/arch/sparc/dax/dax_main.c b/arch/sparc/dax/dax_main.c
index b0782a9f44764..7901f20a409ad 100644
--- a/arch/sparc/dax/dax_main.c
+++ b/arch/sparc/dax/dax_main.c
@@ -779,7 +779,7 @@ static int dax_ioctl_ccb_exec(void *arg, struct file *f)
 
 	rv = dax_map_segment(dax_ctx, ccb_buf, usr_args.dce_ccb_buf_len);
 	if (rv != 0)
-		return rv;
+		return -EFAULT;
 
 	hv_rv = dax_ccb_hv_submit(dax_ctx, ccb_buf, usr_args.dce_ccb_buf_len,
 				  &usr_args);