procfs: return ENOENT on opening a being-removed proc entry

Change the return value to ENOENT.  This return value is then returned
when opening the proc entry that have been removed.  For example,
open("/proc/bus/pci/XX/YY") when the corresponding device is being
hot-removed.

Signed-off-by: Daisuke Ogino <[email protected]>
Cc: Jesse Barnes <[email protected]>
Acked-by: Alexey Dobriyan <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 74b48cfa1bb2d4be464180b6913c6cd28462eb5f..7ed72d6c1c6fc4d2c528e7c5578c2836a2875914 100644 (file)
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -319,7 +319,7 @@ static int proc_reg_open(struct inode *inode, struct file *file)
        if (!pde->proc_fops) {
                spin_unlock(&pde->pde_unload_lock);
                kfree(pdeo);
-               return -EINVAL;
+               return -ENOENT;
        }
        pde->pde_users++;
        open = pde->proc_fops->open;