svcrpc: remove handling of unknown errors from svc_recv

svc_recv() returns only -EINTR or -EAGAIN. If we really want to worry about the case where it has a bug that causes it to return something else, we could stick a WARN() in svc_recv. But it's silly to require every caller to have all this boilerplate to handle that case. Signed-off-by: J. Bruce Fields <[email protected]>
kyagi · Aug 21, 2012 · 5b444cc · 5b444cc
1 parent 9f9d2eb
commit 5b444cc
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Showing 3 changed files with 5 additions and 40 deletions.
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
@@ -126,7 +126,7 @@ static void restart_grace(void)
 static int
 lockd(void *vrqstp)
 {
-	int		err = 0, preverr = 0;
+	int		err = 0;
 	struct svc_rqst *rqstp = vrqstp;
 
 	/* try_to_freeze() is called from svc_recv() */
@@ -165,21 +165,8 @@ lockd(void *vrqstp)
 		 * recvfrom routine.
 		 */
 		err = svc_recv(rqstp, timeout);
-		if (err == -EAGAIN || err == -EINTR) {
-			preverr = err;
+		if (err == -EAGAIN || err == -EINTR)
 			continue;
-		}
-		if (err < 0) {
-			if (err != preverr) {
-				printk(KERN_WARNING "%s: unexpected error "
-					"from svc_recv (%d)\n", __func__, err);
-				preverr = err;
-			}
-			schedule_timeout_interruptible(HZ);
-			continue;
-		}
-		preverr = err;
-
 		dprintk("lockd: request from %s\n",
 				svc_print_addr(rqstp, buf, sizeof(buf)));
 

diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
@@ -45,7 +45,7 @@ unsigned short nfs_callback_tcpport6;
 static int
 nfs4_callback_svc(void *vrqstp)
 {
-	int err, preverr = 0;
+	int err;
 	struct svc_rqst *rqstp = vrqstp;
 
 	set_freezable();
@@ -55,20 +55,8 @@ nfs4_callback_svc(void *vrqstp)
 		 * Listen for a request on the socket
 		 */
 		err = svc_recv(rqstp, MAX_SCHEDULE_TIMEOUT);
-		if (err == -EAGAIN || err == -EINTR) {
-			preverr = err;
+		if (err == -EAGAIN || err == -EINTR)
 			continue;
-		}
-		if (err < 0) {
-			if (err != preverr) {
-				printk(KERN_WARNING "NFS: %s: unexpected error "
-					"from svc_recv (%d)\n", __func__, err);
-				preverr = err;
-			}
-			schedule_timeout_uninterruptible(HZ);
-			continue;
-		}
-		preverr = err;
 		svc_process(rqstp);
 	}
 	return 0;

diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
@@ -487,7 +487,7 @@ static int
 nfsd(void *vrqstp)
 {
 	struct svc_rqst *rqstp = (struct svc_rqst *) vrqstp;
-	int err, preverr = 0;
+	int err;
 
 	/* Lock module and set up kernel thread */
 	mutex_lock(&nfsd_mutex);
@@ -534,16 +534,6 @@ nfsd(void *vrqstp)
 			;
 		if (err == -EINTR)
 			break;
-		else if (err < 0) {
-			if (err != preverr) {
-				printk(KERN_WARNING "%s: unexpected error "
-					"from svc_recv (%d)\n", __func__, -err);
-				preverr = err;
-			}
-			schedule_timeout_uninterruptible(HZ);
-			continue;
-		}
-
 		validate_process_creds();
 		svc_process(rqstp);
 		validate_process_creds();