From: Todd Poynor <toddpoynor@google.com>
Date: Fri, 20 Jul 2018 03:49:07 +0000 (-0700)
Subject: staging: gasket: gasket_mmap return error instead of valid BAR index
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=e80d8afc97fb243833d9939b5098a89379433b3c;p=openwrt%2Fstaging%2Fblogic.git

staging: gasket: gasket_mmap return error instead of valid BAR index

When offset to be mapped matches both a BAR region and a coherent mapped
region return an error as intended, not the BAR index.

Signed-off-by: Simon Que <sque@chromium.org>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/gasket/gasket_core.c b/drivers/staging/gasket/gasket_core.c
index eb5ad161ccda..3cf918f9d260 100644
--- a/drivers/staging/gasket/gasket_core.c
+++ b/drivers/staging/gasket/gasket_core.c
@@ -1627,7 +1627,7 @@ static int gasket_mmap(struct file *filp, struct vm_area_struct *vma)
 			"0x%lx",
 			raw_offset);
 		trace_gasket_mmap_exit(bar_index);
-		return bar_index;
+		return -EINVAL;
 	}
 
 	vma->vm_private_data = gasket_dev;