[PATCH 4.4 087/160] btrfs: dont attempt to trim devices that dont support it

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Jeff Mahoney commit 0be88e367fd8fbdb45257615d691f4675dda062f upstream. We check whether any device the file system is using supports discard in the ioctl call, but then we attempt to trim free

[PATCH 4.4 087/160] btrfs: dont attempt to trim devices that dont support it

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Jeff Mahoney commit 0be88e367fd8fbdb45257615d691f4675dda062f upstream. We check whether any device the file system is using supports discard in the ioctl call, but then we attempt to trim free