Kernel: Fix failing in can_read()/can_write()

Now that the SystemMonitor queries which open files can be read and written to,
having can_read()/can_write() unconditionally call ASSERT_NOT_REACHED() leads
to system crashes when inspecting the WindowServer.

Instead, just return true from can_read()/can_write() (indicating that the
read()/write() syscalls should not block) and return -EINVAL when trying to
actually read from or write to these devices.

1 files changed, 0 insertions, 20 deletions

diff --git a/Kernel/Devices/MBVGADevice.cpp b/Kernel/Devices/MBVGADevice.cpp
index 2b4554e7e5..887a06f355 100644
--- a/Kernel/Devices/MBVGADevice.cpp
+++ b/Kernel/Devices/MBVGADevice.cpp
@@ -81,23 +81,3 @@ int MBVGADevice::ioctl(FileDescription&, unsigned request, unsigned arg)
         return -EINVAL;
     };
 }
-
-bool MBVGADevice::can_read(const FileDescription&) const
-{
-    ASSERT_NOT_REACHED();
-}
-
-bool MBVGADevice::can_write(const FileDescription&) const
-{
-    ASSERT_NOT_REACHED();
-}
-
-ssize_t MBVGADevice::read(FileDescription&, u8*, ssize_t)
-{
-    ASSERT_NOT_REACHED();
-}
-
-ssize_t MBVGADevice::write(FileDescription&, const u8*, ssize_t)
-{
-    ASSERT_NOT_REACHED();
-}