From e552981c8f77981390dc4241525276648d616a37 Mon Sep 17 00:00:00 2001
From: Umang Jain <umang.jain@ideasonboard.com>
Date: Tue, 10 Aug 2021 18:40:19 +0530
Subject: libcamera: MappedFrameBuffer: Print errno on mmap() failure

In mmap() error handling path, errno is stored but never printed
in the error log. Print it.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
---
 src/libcamera/mapped_framebuffer.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/libcamera/mapped_framebuffer.cpp b/src/libcamera/mapped_framebuffer.cpp
index 4ac45083..2ebe9fdb 100644
--- a/src/libcamera/mapped_framebuffer.cpp
+++ b/src/libcamera/mapped_framebuffer.cpp
@@ -182,7 +182,8 @@ MappedFrameBuffer::MappedFrameBuffer(const FrameBuffer *buffer, MapFlags flags)
 				     MAP_SHARED, plane.fd.fd(), 0);
 		if (address == MAP_FAILED) {
 			error_ = -errno;
-			LOG(Buffer, Error) << "Failed to mmap plane";
+			LOG(Buffer, Error) << "Failed to mmap plane: "
+					   << strerror(-error_);
 			break;
 		}
 
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