CIFS: Respect negotiated MaxMpxCount

Some servers sets this value less than 50 that was hardcoded and
we lost the connection if when we exceed this limit. Fix this by
respecting this value - not sending more than the server allows.

Cc: stable@kernel.org
Reviewed-by: Jeff Layton <jlayton@samba.org>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <stevef@smf-gateway.(none)>

1 files changed, 4 insertions, 4 deletions

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index b1fd382d1952..6ee1cb45ca0d 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -76,7 +76,7 @@ MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
 unsigned int cifs_max_pending = CIFS_MAX_REQ;
 module_param(cifs_max_pending, int, 0444);
 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
-                                   "Default: 50 Range: 2 to 256");
+                                   "Default: 32767 Range: 2 to 32767.");
 unsigned short echo_retries = 5;
 module_param(echo_retries, ushort, 0644);
 MODULE_PARM_DESC(echo_retries, "Number of echo attempts before giving up and "
@@ -1116,9 +1116,9 @@ init_cifs(void)
         if (cifs_max_pending < 2) {
                 cifs_max_pending = 2;
                 cFYI(1, "cifs_max_pending set to min of 2");
-        } else if (cifs_max_pending > 256) {
-                cifs_max_pending = 256;
-                cFYI(1, "cifs_max_pending set to max of 256");
+        } else if (cifs_max_pending > CIFS_MAX_REQ) {
+                cifs_max_pending = CIFS_MAX_REQ;
+                cFYI(1, "cifs_max_pending set to max of %u", CIFS_MAX_REQ);
         }
 
         rc = cifs_fscache_register();