From: zhangshuxiao <zhangshuxiao@xiaomi.com>
Date: Wed, 8 Mar 2017 08:53:24 +0000 (+0800)
Subject: staging: android: ashmem: lseek failed due to no FMODE_LSEEK.
X-Git-Tag: khadas-vims-v0.9.6-release~1584^2~788
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b8b8c5af351e0ad239ccaf314a4856b4c9f786c4;p=platform%2Fkernel%2Flinux-amlogic.git

staging: android: ashmem: lseek failed due to no FMODE_LSEEK.

vfs_llseek will check whether the file mode has
FMODE_LSEEK, no return failure. But ashmem can be
lseek, so add FMODE_LSEEK to ashmem file.

Change-Id: Ia78ef4c7c96adb89d52e70b63f7c00636fe60d01
Signed-off-by: zhangshuxiao <zhangshuxiao@xiaomi.com>
(cherry picked from commit 6c8d409129bbebe36cde9f8e511011756216163a)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
---

diff --git a/drivers/staging/android/ashmem.c b/drivers/staging/android/ashmem.c
index 3a52b29..9435dc5 100644
--- a/drivers/staging/android/ashmem.c
+++ b/drivers/staging/android/ashmem.c
@@ -405,6 +405,7 @@ static int ashmem_mmap(struct file *file, struct vm_area_struct *vma)
 			ret = PTR_ERR(vmfile);
 			goto out;
 		}
+		vmfile->f_mode |= FMODE_LSEEK;
 		asma->file = vmfile;
 	}
 	get_file(asma->file);