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Date:      Sun, 22 Feb 2026 02:00:11 +0000
From:      Enji Cooper <ngie@FreeBSD.org>
To:        src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org
Subject:   git: eda36ae09dd1 - main - asmc: resource cleanup simplifications
Message-ID:  <699a632b.4690e.2fab15e8@gitrepo.freebsd.org>
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The branch main has been updated by ngie:

URL: https://cgit.FreeBSD.org/src/commit/?id=eda36ae09dd1fab78bd377739fc5d6c65c61f5d7

commit eda36ae09dd1fab78bd377739fc5d6c65c61f5d7
Author:     Enji Cooper <ngie@FreeBSD.org>
AuthorDate: 2026-01-30 06:55:08 +0000
Commit:     Enji Cooper <ngie@FreeBSD.org>
CommitDate: 2026-02-22 01:59:06 +0000

    asmc: resource cleanup simplifications
    
    This change makes `asmc_detach(..)` reentrant by setting freed resources
    to known invalid values when done, and makes `asmc_attach(..)` call
    `asmc_detach(..)` instead of attempting to the semi-equivalent way of
    cleaning up the driver resources allocated in `asmc_detach(..)`.
    
    MFC after:      1 week
    Differential Revision:  https://reviews.freebsd.org/D55413
---
 sys/dev/asmc/asmc.c | 33 +++++++++++++++++++--------------
 1 file changed, 19 insertions(+), 14 deletions(-)

diff --git a/sys/dev/asmc/asmc.c b/sys/dev/asmc/asmc.c
index bff214c084c5..084b57331dd9 100644
--- a/sys/dev/asmc/asmc.c
+++ b/sys/dev/asmc/asmc.c
@@ -795,25 +795,21 @@ asmc_attach(device_t dev)
 	if (sc->sc_irq == NULL) {
 		device_printf(dev, "unable to allocate IRQ resource\n");
 		ret = ENXIO;
-		goto err2;
+		goto err;
 	}
 
 	ret = bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_MISC | INTR_MPSAFE,
 	    asmc_sms_intrfast, NULL, dev, &sc->sc_cookie);
 	if (ret) {
 		device_printf(dev, "unable to setup SMS IRQ\n");
-		goto err1;
+		goto err;
 	}
+
 nosms:
 	return (0);
-err1:
-	bus_release_resource(dev, SYS_RES_IRQ, sc->sc_rid_irq, sc->sc_irq);
-err2:
-	bus_release_resource(dev, SYS_RES_IOPORT, sc->sc_rid_port,
-	    sc->sc_ioport);
-	mtx_destroy(&sc->sc_mtx);
-	if (sc->sc_sms_tq)
-		taskqueue_free(sc->sc_sms_tq);
+
+err:
+	asmc_detach(dev);
 
 	return (ret);
 }
@@ -826,16 +822,25 @@ asmc_detach(device_t dev)
 	if (sc->sc_sms_tq) {
 		taskqueue_drain(sc->sc_sms_tq, &sc->sc_sms_task);
 		taskqueue_free(sc->sc_sms_tq);
+		sc->sc_sms_tq = NULL;
 	}
-	if (sc->sc_cookie)
+	if (sc->sc_cookie) {
 		bus_teardown_intr(dev, sc->sc_irq, sc->sc_cookie);
-	if (sc->sc_irq)
+		sc->sc_cookie = NULL;
+	}
+	if (sc->sc_irq) {
 		bus_release_resource(dev, SYS_RES_IRQ, sc->sc_rid_irq,
 		    sc->sc_irq);
-	if (sc->sc_ioport)
+		sc->sc_irq = NULL;
+	}
+	if (sc->sc_ioport) {
 		bus_release_resource(dev, SYS_RES_IOPORT, sc->sc_rid_port,
 		    sc->sc_ioport);
-	mtx_destroy(&sc->sc_mtx);
+		sc->sc_ioport = NULL;
+	}
+	if (mtx_initialized(&sc->sc_mtx)) {
+		mtx_destroy(&sc->sc_mtx);
+	}
 
 	return (0);
 }
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