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AFS: further write support fixes

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Further fixes for AFS write support:

 (1) The afs_send_pages() outer loop must do an extra iteration if it ends
     with 'first == last' because 'last' is inclusive in the page set
     otherwise it fails to send the last page and complete the RxRPC op under
     some circumstances.

 (2) Similarly, the outer loop in afs_pages_written_back() must also do an
     extra iteration if it ends with 'first == last', otherwise it fails to
     clear PG_writeback on the last page under some circumstances.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells 2007-05-10 03:15:23 -07:00 committed by Linus Torvalds
parent b9b1f8d593
commit 5bbf5d39f8
2 changed files with 3 additions and 3 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

2
fs/afs/rxrpc.c
View file

@ -294,7 +294,7 @@ int afs_send_pages(struct afs_call *call, struct msghdr *msg, struct kvec *iov)
put_page(pages[loop]);
if (ret < 0)
break;
} while (first < last);
} while (first <= last);
_leave(" = %d", ret);
return ret;

4
fs/afs/write.c
View file

@ -669,7 +669,7 @@ void afs_pages_written_back(struct afs_vnode *vnode, struct afs_call *call)
pagevec_init(&pv, 0);
do {
_debug("attach %lx-%lx", first, last);
_debug("done %lx-%lx", first, last);
count = last - first + 1;
if (count > PAGEVEC_SIZE)
@ -701,7 +701,7 @@ void afs_pages_written_back(struct afs_vnode *vnode, struct afs_call *call)
}
__pagevec_release(&pv);
} while (first < last);
} while (first <= last);
_leave("");
}