Commit 70ef3851 authored by David Howells's avatar David Howells Committed by Steve French
Browse files

cifs: writeback fix 



Wait for the page to be written to the cache before we allow it
to be modified

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Reviewed-by: default avatarPaulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
parent 5d7e2825

fs/cifs/file.c

+7 −1
Original line number Diff line number Diff line
@@ -4210,13 +4210,19 @@ cifs_page_mkwrite(struct vm_fault *vmf) 
{

	struct page *page = vmf->page;



	/* Wait for the page to be written to the cache before we allow it to

	 * be modified.  We then assume the entire page will need writing back.

	 */

#ifdef CONFIG_CIFS_FSCACHE

	if (PageFsCache(page) &&

	    wait_on_page_fscache_killable(page) < 0)

		return VM_FAULT_RETRY;

#endif



	lock_page(page);

	wait_on_page_writeback(page);



	if (lock_page_killable(page) < 0)

		return VM_FAULT_RETRY;

	return VM_FAULT_LOCKED;

}