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CIFS: Simplify inFlight logic

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by making it as unsigned integer and surround access with req_lock
from server structure.

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Pavel Shilovsky
2012-02-17 17:09:12 +03:00
committed by Steve French
parent 1daaae8fa4
commit fc40f9cf82
5 changed files with 52 additions and 33 deletions
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10
fs/cifs/connect.c
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@@ -643,14 +643,14 @@ static void clean_demultiplex_info(struct TCP_Server_Info *server)
wake_up_all(&server->response_q);
/* Check if we have blocked requests that need to free. */
spin_lock(&GlobalMid_Lock);
if (atomic_read(&server->inFlight) >= server->maxReq)
atomic_set(&server->inFlight, server->maxReq - 1);
spin_lock(&server->req_lock);
if (server->in_flight >= server->maxReq)
server->in_flight = server->maxReq - 1;
/*
* We do not want to set the max_pending too low or we could end up
* with the counter going negative.
*/
spin_unlock(&GlobalMid_Lock);
spin_unlock(&server->req_lock);
/*
* Although there should not be any requests blocked on this queue it
* can not hurt to be paranoid and try to wake up requests that may
@@ -1905,7 +1905,7 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
tcp_ses->noblocksnd = volume_info->noblocksnd;
tcp_ses->noautotune = volume_info->noautotune;
tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
atomic_set(&tcp_ses->inFlight, 0);
tcp_ses->in_flight = 0;
tcp_ses->maxReq = 1; /* enough to send negotiate request */
init_waitqueue_head(&tcp_ses->response_q);
init_waitqueue_head(&tcp_ses->request_q);