From: aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Mon, 13 Oct 2008 21:08:34 +0000 (+0000)
Subject: open() can also return EPERM for O_RDWR on a readonly device
X-Git-Tag: stefano.display-merge-start~307
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=a0a83536e04e601bcd831dea44edd0663638bb37;p=qemu-xen-4.4-testing.git

open() can also return EPERM for O_RDWR on a readonly device

Signed-off-by: Juergen Lock <nox@jelal.kn-bremen.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5482 c046a42c-6fe2-441c-8c8c-71466251a162
---

diff --git a/block.c b/block.c
index 3eb452616..5d708baad 100644
--- a/block.c
+++ b/block.c
@@ -399,7 +399,7 @@ int bdrv_open2(BlockDriverState *bs, const char *filename, int flags,
     else
         open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT);
     ret = drv->bdrv_open(bs, filename, open_flags);
-    if (ret == -EACCES && !(flags & BDRV_O_FILE)) {
+    if ((ret == -EACCES || ret == -EPERM) && !(flags & BDRV_O_FILE)) {
         ret = drv->bdrv_open(bs, filename, BDRV_O_RDONLY);
         bs->read_only = 1;
     }