[Qemu-devel] 9p: [RFC] [PATCH 02/02] Make use of iounit for read/write

["M. Mohan Kumar" <mohan@in.ibm.com>]

Change the v9fs_file_readn function to limit the maximum transfer size
based on the iounit instead of msize.

Also remove the redundant check for limiting the transfer size in
v9fs_file_write. This check is done by p9_client_write.

Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
---
 fs/9p/vfs_file.c |   10 ++--------
 1 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 25b300e..b8c0891 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -160,7 +160,7 @@ v9fs_file_readn(struct file *filp, char *data, char __user *udata, u32 count,
 		offset += n;
 		count -= n;
 		total += n;
-	} while (count > 0 && n == (fid->clnt->msize - P9_IOHDRSZ));
+	} while (count > 0 && n == fid->iounit);
 
 	if (n < 0)
 		total = n;
@@ -187,11 +187,7 @@ v9fs_file_read(struct file *filp, char __user *udata, size_t count,
 	P9_DPRINTK(P9_DEBUG_VFS, "count %zu offset %lld\n", count, *offset);
 	fid = filp->private_data;
 
-	if (count > (fid->clnt->msize - P9_IOHDRSZ))
-		ret = v9fs_file_readn(filp, NULL, udata, count, *offset);
-	else
-		ret = p9_client_read(fid, NULL, udata, *offset, count);
-
+	ret = v9fs_file_readn(filp, NULL, udata, count, *offset);
 	if (ret > 0)
 		*offset += ret;
 
@@ -225,8 +221,6 @@ v9fs_file_write(struct file *filp, const char __user * data,
 	clnt = fid->clnt;
 
 	rsize = fid->iounit;
-	if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
-		rsize = clnt->msize - P9_IOHDRSZ;
 
 	do {
 		if (count < rsize)
-- 
1.6.6.1