linux-kernel - [PATCH 23/32] staging: gasket: gasket_mmap return error instead of valid BAR index

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Message-Id: <20180717020926.176408-24-toddpoynor@gmail.com>
Date:   Mon, 16 Jul 2018 19:09:17 -0700
From:   Todd Poynor <toddpoynor@...il.com>
To:     Rob Springer <rspringer@...gle.com>,
        John Joseph <jnjoseph@...gle.com>,
        Ben Chan <benchan@...omium.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Zhongze Hu <frankhu@...omium.org>, Simon Que <sque@...omium.org>,
        Dmitry Torokhov <dtor@...omium.org>,
        Guenter Roeck <groeck@...omium.org>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        Todd Poynor <toddpoynor@...gle.com>
Subject: [PATCH 23/32] staging: gasket: gasket_mmap return error instead of valid BAR index

From: Todd Poynor <toddpoynor@...gle.com>

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@...omium.org>
Signed-off-by: Todd Poynor <toddpoynor@...gle.com>
---
 drivers/staging/gasket/gasket_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/gasket/gasket_core.c b/drivers/staging/gasket/gasket_core.c
index 131ae2462edc1..1d979772217bf 100644
--- a/drivers/staging/gasket/gasket_core.c
+++ b/drivers/staging/gasket/gasket_core.c
@@ -1630,7 +1630,7 @@ 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;
-- 
2.18.0.203.gfac676dfb9-goog