From owner-svn-src-all@FreeBSD.ORG  Sun Nov 23 14:02:06 2008
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id B2D991065677;
	Sun, 23 Nov 2008 14:02:06 +0000 (UTC) (envelope-from mav@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id A5E698FC1A;
	Sun, 23 Nov 2008 14:02:06 +0000 (UTC) (envelope-from mav@FreeBSD.org)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id mANE268j053595;
	Sun, 23 Nov 2008 14:02:06 GMT (envelope-from mav@svn.freebsd.org)
Received: (from mav@localhost)
	by svn.freebsd.org (8.14.3/8.14.3/Submit) id mANE26bB053594;
	Sun, 23 Nov 2008 14:02:06 GMT (envelope-from mav@svn.freebsd.org)
Message-Id: <200811231402.mANE26bB053594@svn.freebsd.org>
From: Alexander Motin <mav@FreeBSD.org>
Date: Sun, 23 Nov 2008 14:02:06 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-head@freebsd.org
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r185201 - head/sys/dev/mmc
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
	user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 23 Nov 2008 14:02:06 -0000

Author: mav
Date: Sun Nov 23 14:02:06 2008
New Revision: 185201
URL: http://svn.freebsd.org/changeset/base/185201

Log:
  Improve detach handling: close races, flush queue.

Modified:
  head/sys/dev/mmc/mmcsd.c

Modified: head/sys/dev/mmc/mmcsd.c
==============================================================================
--- head/sys/dev/mmc/mmcsd.c	Sun Nov 23 13:03:44 2008	(r185200)
+++ head/sys/dev/mmc/mmcsd.c	Sun Nov 23 14:02:06 2008	(r185201)
@@ -184,9 +184,10 @@ mmcsd_detach(device_t dev)
 		msleep(sc, &sc->sc_mtx, PRIBIO, "detach", 0);
 	MMCSD_UNLOCK(sc);
 
+	/* Flush the request queue. */
+	bioq_flush(&sc->bio_queue, NULL, ENXIO);
 	/* kill disk */
 	disk_destroy(sc->disk);
-	/* XXX destroy anything in queue */
 
 	MMCSD_LOCK_DESTROY(sc);
 
@@ -212,9 +213,14 @@ mmcsd_strategy(struct bio *bp)
 
 	sc = (struct mmcsd_softc *)bp->bio_disk->d_drv1;
 	MMCSD_LOCK(sc);
-	bioq_disksort(&sc->bio_queue, bp);
-	wakeup(sc);
-	MMCSD_UNLOCK(sc);
+	if (sc->running > 0) {
+		bioq_disksort(&sc->bio_queue, bp);
+		wakeup(sc);
+		MMCSD_UNLOCK(sc);
+	} else {
+		MMCSD_UNLOCK(sc);
+		biofinish(bp, NULL, ENXIO);
+	}
 }
 
 static daddr_t
@@ -380,18 +386,16 @@ mmcsd_task(void *arg)
 	device_t dev;
 
 	dev = sc->dev;
-	while (sc->running) {
+	while (1) {
 		MMCSD_LOCK(sc);
 		do {
-			bp = bioq_first(&sc->bio_queue);
+			if (sc->running == 0)
+				goto out;
+			bp = bioq_takefirst(&sc->bio_queue);
 			if (bp == NULL)
 				msleep(sc, &sc->sc_mtx, PRIBIO, "jobqueue", 0);
-		} while (bp == NULL && sc->running);
-		if (bp)
-			bioq_remove(&sc->bio_queue, bp);
+		} while (bp == NULL);
 		MMCSD_UNLOCK(sc);
-		if (!sc->running)
-			break;
 		if (bp->bio_cmd != BIO_READ && mmc_get_read_only(dev)) {
 			bp->bio_error = EROFS;
 			bp->bio_resid = bp->bio_bcount;
@@ -419,9 +423,8 @@ mmcsd_task(void *arg)
 		}
 		biodone(bp);
 	}
-
+out:
 	/* tell parent we're done */
-	MMCSD_LOCK(sc);
 	sc->running = -1;
 	wakeup(sc);
 	MMCSD_UNLOCK(sc);