The branch main has been updated by mav:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=1f7a6325fe1b628c18b51d94eeec879c38c650b8

commit 1f7a6325fe1b628c18b51d94eeec879c38c650b8
Author:     Alexander Motin <[email protected]>
AuthorDate: 2021-09-04 22:22:53 +0000
Commit:     Alexander Motin <[email protected]>
CommitDate: 2021-09-04 22:30:36 +0000

    sound(4): Remove pointless Giant from bus_dma_tag_create().
    
    None of the drivers really implement asynchronous buffer loading, so
    they don't need lock there.  The only question is which of them have
    BUS_DMA_NOWAIT flag there already, and to which it should be added.
---
 sys/dev/sound/isa/ad1816.c  |  4 ++--
 sys/dev/sound/isa/ess.c     |  4 ++--
 sys/dev/sound/isa/mss.c     |  2 +-
 sys/dev/sound/isa/sb16.c    |  2 +-
 sys/dev/sound/isa/sb8.c     |  2 +-
 sys/dev/sound/pci/aureal.c  |  4 ++--
 sys/dev/sound/pci/cs4281.c  |  4 ++--
 sys/dev/sound/pci/csapcm.c  |  4 ++--
 sys/dev/sound/pci/emu10k1.c |  8 ++++----
 sys/dev/sound/pci/emu10kx.c |  4 ++--
 sys/dev/sound/pci/envy24.c  | 10 ++++++----
 sys/dev/sound/pci/fm801.c   |  4 ++--
 sys/dev/sound/pci/hdspe.c   | 16 ++++++++--------
 sys/dev/sound/pci/maestro.c |  8 ++++----
 sys/dev/sound/pci/solo.c    | 29 +----------------------------
 sys/dev/sound/pci/t4dwave.c |  4 ++--
 sys/dev/sound/pci/vibes.c   |  4 ++--
 sys/dev/sound/pcm/buffer.c  |  2 +-
 18 files changed, 45 insertions(+), 70 deletions(-)

diff --git a/sys/dev/sound/isa/ad1816.c b/sys/dev/sound/isa/ad1816.c
index e8d7ac7cf62f..97da82c21ff5 100644
--- a/sys/dev/sound/isa/ad1816.c
+++ b/sys/dev/sound/isa/ad1816.c
@@ -620,8 +620,8 @@ ad1816_attach(device_t dev)
                        /*filter*/NULL, /*filterarg*/NULL,
                        /*maxsize*/ad1816->bufsize, /*nsegments*/1,
                        /*maxsegz*/0x3ffff,
-                       /*flags*/0, /*lockfunc*/busdma_lock_mutex,
-                       /*lockarg*/ &Giant, &ad1816->parent_dmat) != 0) {
+                       /*flags*/0, /*lockfunc*/NULL, /*lockarg*/NULL,
+                       &ad1816->parent_dmat) != 0) {
                device_printf(dev, "unable to create dma tag\n");
                goto no;
        }
diff --git a/sys/dev/sound/isa/ess.c b/sys/dev/sound/isa/ess.c
index 424e757a4b00..46405ec48aac 100644
--- a/sys/dev/sound/isa/ess.c
+++ b/sys/dev/sound/isa/ess.c
@@ -859,8 +859,8 @@ ess_attach(device_t dev)
                        /*filter*/NULL, /*filterarg*/NULL,
                        /*maxsize*/sc->bufsize, /*nsegments*/1,
                        /*maxsegz*/0x3ffff,
-                       /*flags*/0, /*lockfunc*/busdma_lock_mutex,
-                       /*lockarg*/&Giant, &sc->parent_dmat) != 0) {
+                       /*flags*/0, /*lockfunc*/NULL, /*lockarg*/NULL,
+                       &sc->parent_dmat) != 0) {
                device_printf(dev, "unable to create dma tag\n");
                goto no;
        }
diff --git a/sys/dev/sound/isa/mss.c b/sys/dev/sound/isa/mss.c
index eacbbf85849c..745a20dbf1f0 100644
--- a/sys/dev/sound/isa/mss.c
+++ b/sys/dev/sound/isa/mss.c
@@ -1732,7 +1732,7 @@ mss_doattach(device_t dev, struct mss_info *mss)
                        /*filter*/NULL, /*filterarg*/NULL,
                        /*maxsize*/mss->bufsize, /*nsegments*/1,
                        /*maxsegz*/0x3ffff, /*flags*/0,
-                       /*lockfunc*/busdma_lock_mutex, /*lockarg*/&Giant,
+                       /*lockfunc*/NULL, /*lockarg*/NULL,
                        &mss->parent_dmat) != 0) {
                device_printf(dev, "unable to create dma tag\n");
                goto no;
diff --git a/sys/dev/sound/isa/sb16.c b/sys/dev/sound/isa/sb16.c
index 73ec7c56245e..38e15a427d50 100644
--- a/sys/dev/sound/isa/sb16.c
+++ b/sys/dev/sound/isa/sb16.c
@@ -846,7 +846,7 @@ sb16_attach(device_t dev)
                        /*filter*/NULL, /*filterarg*/NULL,
                        /*maxsize*/sb->bufsize, /*nsegments*/1,
                        /*maxsegz*/0x3ffff, /*flags*/0,
-                       /*lockfunc*/busdma_lock_mutex, /*lockarg*/&Giant,
+                       /*lockfunc*/NULL, /*lockarg*/NULL,
                        &sb->parent_dmat) != 0) {
                device_printf(dev, "unable to create dma tag\n");
                goto no;
diff --git a/sys/dev/sound/isa/sb8.c b/sys/dev/sound/isa/sb8.c
index 779c6631b264..3fcc1770e136 100644
--- a/sys/dev/sound/isa/sb8.c
+++ b/sys/dev/sound/isa/sb8.c
@@ -743,7 +743,7 @@ sb_attach(device_t dev)
                        /*filter*/NULL, /*filterarg*/NULL,
                        /*maxsize*/sb->bufsize, /*nsegments*/1,
                        /*maxsegz*/0x3ffff, /*flags*/0,
-                       /*lockfunc*/busdma_lock_mutex, /*lockarg*/&Giant,
+                       /*lockfunc*/NULL, /*lockarg*/NULL,
                        &sb->parent_dmat) != 0) {
                device_printf(dev, "unable to create dma tag\n");
                goto no;
diff --git a/sys/dev/sound/pci/aureal.c b/sys/dev/sound/pci/aureal.c
index f4b9906e20e0..820e603192af 100644
--- a/sys/dev/sound/pci/aureal.c
+++ b/sys/dev/sound/pci/aureal.c
@@ -642,8 +642,8 @@ au_pci_attach(device_t dev)
                /*highaddr*/BUS_SPACE_MAXADDR,
                /*filter*/NULL, /*filterarg*/NULL,
                /*maxsize*/AU_BUFFSIZE, /*nsegments*/1, /*maxsegz*/0x3ffff,
-               /*flags*/0, /*lockfunc*/busdma_lock_mutex,
-               /*lockarg*/&Giant, &au->parent_dmat) != 0) {
+               /*flags*/0, /*lockfunc*/NULL, /*lockarg*/NULL,
+               &au->parent_dmat) != 0) {
                device_printf(dev, "unable to create dma tag\n");
                goto bad;
        }
diff --git a/sys/dev/sound/pci/cs4281.c b/sys/dev/sound/pci/cs4281.c
index fe73e14edb29..b955a6284800 100644
--- a/sys/dev/sound/pci/cs4281.c
+++ b/sys/dev/sound/pci/cs4281.c
@@ -823,8 +823,8 @@ cs4281_pci_attach(device_t dev)
                           /*filter*/NULL, /*filterarg*/NULL,
                           /*maxsize*/sc->bufsz, /*nsegments*/1,
                           /*maxsegz*/0x3ffff,
-                          /*flags*/0, /*lockfunc*/busdma_lock_mutex,
-                          /*lockarg*/&Giant, &sc->parent_dmat) != 0) {
+                          /*flags*/0, /*lockfunc*/NULL, /*lockarg*/NULL,
+                          &sc->parent_dmat) != 0) {
        device_printf(dev, "unable to create dma tag\n");
        goto bad;
     }
diff --git a/sys/dev/sound/pci/csapcm.c b/sys/dev/sound/pci/csapcm.c
index a0b35c909931..7fd55291d876 100644
--- a/sys/dev/sound/pci/csapcm.c
+++ b/sys/dev/sound/pci/csapcm.c
@@ -716,8 +716,8 @@ csa_allocres(struct csa_info *csa, device_t dev)
                               /*highaddr*/BUS_SPACE_MAXADDR,
                               /*filter*/NULL, /*filterarg*/NULL,
                               /*maxsize*/CS461x_BUFFSIZE, /*nsegments*/1, 
/*maxsegz*/0x3ffff,
-                              /*flags*/0, /*lockfunc*/busdma_lock_mutex,
-                              /*lockarg*/&Giant, &csa->parent_dmat) != 0)
+                              /*flags*/0, /*lockfunc*/NULL, /*lockarg*/NULL,
+                              &csa->parent_dmat) != 0)
                return (1);
 
        return (0);
diff --git a/sys/dev/sound/pci/emu10k1.c b/sys/dev/sound/pci/emu10k1.c
index 9ee71ed96847..c8829a4017e3 100644
--- a/sys/dev/sound/pci/emu10k1.c
+++ b/sys/dev/sound/pci/emu10k1.c
@@ -1328,8 +1328,8 @@ emu_malloc(struct sc_info *sc, u_int32_t sz, bus_addr_t 
*addr,
        *addr = 0;
        if (bus_dmamem_alloc(sc->parent_dmat, &buf, BUS_DMA_NOWAIT, map))
                return NULL;
-       if (bus_dmamap_load(sc->parent_dmat, *map, buf, sz, emu_setmap, addr, 0)
-           || !*addr) {
+       if (bus_dmamap_load(sc->parent_dmat, *map, buf, sz, emu_setmap, addr,
+           BUS_DMA_NOWAIT) || !*addr) {
                bus_dmamem_free(sc->parent_dmat, buf, *map);
                return NULL;
        }
@@ -2107,8 +2107,8 @@ emu_pci_attach(device_t dev)
                /*highaddr*/BUS_SPACE_MAXADDR,
                /*filter*/NULL, /*filterarg*/NULL,
                /*maxsize*/sc->bufsz, /*nsegments*/1, /*maxsegz*/0x3ffff,
-               /*flags*/0, /*lockfunc*/busdma_lock_mutex,
-               /*lockarg*/&Giant, &sc->parent_dmat) != 0) {
+               /*flags*/0, /*lockfunc*/NULL, /*lockarg*/NULL,
+               &sc->parent_dmat) != 0) {
                device_printf(dev, "unable to create dma tag\n");
                goto bad;
        }
diff --git a/sys/dev/sound/pci/emu10kx.c b/sys/dev/sound/pci/emu10kx.c
index 5ae760845008..611af91de4d4 100644
--- a/sys/dev/sound/pci/emu10kx.c
+++ b/sys/dev/sound/pci/emu10kx.c
@@ -2700,8 +2700,8 @@ emu_init(struct emu_sc_info *sc)
             /* highaddr */ BUS_SPACE_MAXADDR,
             /* filter */ NULL, /* filterarg */ NULL,
             /* maxsize */ EMU_MAX_BUFSZ, /* nsegments */ 1, /* maxsegz */ 
0x3ffff,
-            /* flags */ 0, /* lockfunc */ busdma_lock_mutex,
-            /* lockarg */ &Giant, &(sc->mem.dmat)) != 0) {
+            /* flags */ 0, /* lockfunc */NULL, /* lockarg */NULL,
+            &sc->mem.dmat) != 0) {
                device_printf(sc->dev, "unable to create dma tag\n");
                bus_dma_tag_destroy(sc->mem.dmat);
                return (ENOMEM);
diff --git a/sys/dev/sound/pci/envy24.c b/sys/dev/sound/pci/envy24.c
index a6cb28ab6040..36f453bd9252 100644
--- a/sys/dev/sound/pci/envy24.c
+++ b/sys/dev/sound/pci/envy24.c
@@ -2264,12 +2264,14 @@ envy24_dmainit(struct sc_info *sc)
 #if(0)
        device_printf(sc->dev, "envy24_dmainit(): bus_dmamem_load(): 
sc->pmap\n");
 #endif
-       if (bus_dmamap_load(sc->dmat, sc->pmap, sc->pbuf, sc->psize, 
envy24_dmapsetmap, sc, 0))
+       if (bus_dmamap_load(sc->dmat, sc->pmap, sc->pbuf, sc->psize,
+           envy24_dmapsetmap, sc, BUS_DMA_NOWAIT))
                goto bad;
 #if(0)
        device_printf(sc->dev, "envy24_dmainit(): bus_dmamem_load(): 
sc->rmap\n");
 #endif
-       if (bus_dmamap_load(sc->dmat, sc->rmap, sc->rbuf, sc->rsize, 
envy24_dmarsetmap, sc, 0))
+       if (bus_dmamap_load(sc->dmat, sc->rmap, sc->rbuf, sc->rsize,
+           envy24_dmarsetmap, sc, BUS_DMA_NOWAIT))
                goto bad;
        bzero(sc->pbuf, sc->psize);
        bzero(sc->rbuf, sc->rsize);
@@ -2534,8 +2536,8 @@ envy24_alloc_resource(struct sc_info *sc)
            /*filter*/NULL, /*filterarg*/NULL,
            /*maxsize*/BUS_SPACE_MAXSIZE_ENVY24,
            /*nsegments*/1, /*maxsegsz*/0x3ffff,
-           /*flags*/0, /*lockfunc*/busdma_lock_mutex,
-           /*lockarg*/&Giant, &sc->dmat) != 0) {
+           /*flags*/0, /*lockfunc*/NULL, /*lockarg*/NULL,
+           &sc->dmat) != 0) {
                device_printf(sc->dev, "unable to create dma tag\n");
                return ENXIO;
        }
diff --git a/sys/dev/sound/pci/fm801.c b/sys/dev/sound/pci/fm801.c
index 886d50f27fe7..3a7e0877ae7a 100644
--- a/sys/dev/sound/pci/fm801.c
+++ b/sys/dev/sound/pci/fm801.c
@@ -632,8 +632,8 @@ fm801_pci_attach(device_t dev)
                /*highaddr*/BUS_SPACE_MAXADDR,
                /*filter*/NULL, /*filterarg*/NULL,
                /*maxsize*/fm801->bufsz, /*nsegments*/1, /*maxsegz*/0x3ffff,
-               /*flags*/0, /*lockfunc*/busdma_lock_mutex,
-               /*lockarg*/&Giant, &fm801->parent_dmat) != 0) {
+               /*flags*/0, /*lockfunc*/NULL, /*lockarg*/NULL,
+               &fm801->parent_dmat) != 0) {
                device_printf(dev, "unable to create dma tag\n");
                goto oops;
        }
diff --git a/sys/dev/sound/pci/hdspe.c b/sys/dev/sound/pci/hdspe.c
index 6eb0436816a6..f91e6f6d4931 100644
--- a/sys/dev/sound/pci/hdspe.c
+++ b/sys/dev/sound/pci/hdspe.c
@@ -172,8 +172,8 @@ hdspe_alloc_resources(struct sc_info *sc)
                /*nsegments*/2,
                /*maxsegsz*/HDSPE_DMASEGSIZE,
                /*flags*/0,
-               /*lockfunc*/busdma_lock_mutex,
-               /*lockarg*/&Giant,
+               /*lockfunc*/NULL,
+               /*lockarg*/NULL,
                /*dmatag*/&sc->dmat) != 0) {
                device_printf(sc->dev, "Unable to create dma tag.\n");
                return (ENXIO);
@@ -182,27 +182,27 @@ hdspe_alloc_resources(struct sc_info *sc)
        sc->bufsize = HDSPE_DMASEGSIZE;
 
        /* pbuf (play buffer). */
-       if (bus_dmamem_alloc(sc->dmat, (void **)&sc->pbuf,
-               BUS_DMA_NOWAIT, &sc->pmap)) {
+       if (bus_dmamem_alloc(sc->dmat, (void **)&sc->pbuf, BUS_DMA_WAITOK,
+           &sc->pmap)) {
                device_printf(sc->dev, "Can't alloc pbuf.\n");
                return (ENXIO);
        }
 
        if (bus_dmamap_load(sc->dmat, sc->pmap, sc->pbuf, sc->bufsize,
-               hdspe_dmapsetmap, sc, 0)) {
+           hdspe_dmapsetmap, sc, BUS_DMA_NOWAIT)) {
                device_printf(sc->dev, "Can't load pbuf.\n");
                return (ENXIO);
        }
 
        /* rbuf (rec buffer). */
-       if (bus_dmamem_alloc(sc->dmat, (void **)&sc->rbuf,
-               BUS_DMA_NOWAIT, &sc->rmap)) {
+       if (bus_dmamem_alloc(sc->dmat, (void **)&sc->rbuf, BUS_DMA_WAITOK,
+           &sc->rmap)) {
                device_printf(sc->dev, "Can't alloc rbuf.\n");
                return (ENXIO);
        }
 
        if (bus_dmamap_load(sc->dmat, sc->rmap, sc->rbuf, sc->bufsize,
-               hdspe_dmapsetmap, sc, 0)) {
+           hdspe_dmapsetmap, sc, BUS_DMA_NOWAIT)) {
                device_printf(sc->dev, "Can't load rbuf.\n");
                return (ENXIO);
        }
diff --git a/sys/dev/sound/pci/maestro.c b/sys/dev/sound/pci/maestro.c
index ed1c9ef1cad6..3caccdb12fe9 100644
--- a/sys/dev/sound/pci/maestro.c
+++ b/sys/dev/sound/pci/maestro.c
@@ -1716,8 +1716,8 @@ dma_malloc(bus_dma_tag_t dmat, u_int32_t sz, bus_addr_t 
*phys,
 
        if (bus_dmamem_alloc(dmat, &buf, BUS_DMA_NOWAIT, map))
                return NULL;
-       if (bus_dmamap_load(dmat, *map, buf, sz, setmap, phys, 0) != 0 ||
-           *phys == 0) {
+       if (bus_dmamap_load(dmat, *map, buf, sz, setmap, phys,
+           BUS_DMA_NOWAIT) != 0 || *phys == 0) {
                bus_dmamem_free(dmat, buf, *map);
                return NULL;
        }
@@ -1793,7 +1793,7 @@ agg_attach(device_t dev)
                               /*filter*/ NULL, NULL,
                               /*size  */ ess->bufsz, 1, 0x3ffff,
                               /*flags */ 0,
-                              /*lock  */ busdma_lock_mutex, &Giant,
+                              /*lock  */ NULL, NULL,
                               &ess->buf_dmat) != 0) {
                device_printf(dev, "unable to create dma tag\n");
                ret = ENOMEM;
@@ -1807,7 +1807,7 @@ agg_attach(device_t dev)
                               /*filter*/ NULL, NULL,
                               /*size  */ 3*ess->bufsz, 1, 0x3ffff,
                               /*flags */ 0,
-                              /*lock  */ busdma_lock_mutex, &Giant,
+                              /*lock  */ NULL, NULL,
                               &ess->stat_dmat) != 0) {
                device_printf(dev, "unable to create dma tag\n");
                ret = ENOMEM;
diff --git a/sys/dev/sound/pci/solo.c b/sys/dev/sound/pci/solo.c
index 6d5b833264d6..7132a7f34dee 100644
--- a/sys/dev/sound/pci/solo.c
+++ b/sys/dev/sound/pci/solo.c
@@ -50,9 +50,6 @@ SND_DECLARE_FILE("$FreeBSD$");
 /* more accurate clocks and split audio1/audio2 rates */
 #define ESS18XX_NEWSPEED
 
-/* 1 = INTR_MPSAFE, 0 = GIANT */
-#define ESS18XX_MPSAFE 1
-
 static u_int32_t ess_playfmt[] = {
        SND_FORMAT(AFMT_U8, 1, 0),
        SND_FORMAT(AFMT_U8, 2, 0),
@@ -103,20 +100,12 @@ struct ess_info {
        unsigned int bufsz;
 
        struct ess_chinfo pch, rch;
-#if ESS18XX_MPSAFE == 1
        struct mtx *lock;
-#endif
 };
 
-#if ESS18XX_MPSAFE == 1
 #define ess_lock(_ess) snd_mtxlock((_ess)->lock)
 #define ess_unlock(_ess) snd_mtxunlock((_ess)->lock)
 #define ess_lock_assert(_ess) snd_mtxassert((_ess)->lock)
-#else
-#define ess_lock(_ess)
-#define ess_unlock(_ess)
-#define ess_lock_assert(_ess)
-#endif
 
 static int ess_rd(struct ess_info *sc, int reg);
 static void ess_wr(struct ess_info *sc, int reg, u_int8_t val);
@@ -868,12 +857,10 @@ ess_release_resources(struct ess_info *sc, device_t dev)
                sc->parent_dmat = 0;
        }
 
-#if ESS18XX_MPSAFE == 1
        if (sc->lock) {
                snd_mtxfree(sc->lock);
                sc->lock = NULL;
        }
-#endif
 
        free(sc, M_DEVBUF);
 }
@@ -902,14 +889,10 @@ ess_alloc_resources(struct ess_info *sc, device_t dev)
        sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
                RF_ACTIVE | RF_SHAREABLE);
 
-#if ESS18XX_MPSAFE == 1
        sc->lock = snd_mtxcreate(device_get_nameunit(dev), "snd_solo softc");
 
        return (sc->irq && sc->io && sc->sb && sc->vc &&
                                sc->mpu && sc->gp && sc->lock)? 0 : ENXIO;
-#else
-       return (sc->irq && sc->io && sc->sb && sc->vc && sc->mpu && sc->gp)? 0 
: ENXIO;
-#endif
 }
 
 static int
@@ -1008,13 +991,7 @@ ess_attach(device_t dev)
 #else
        sc->newspeed = 0;
 #endif
-       if (snd_setup_intr(dev, sc->irq,
-#if ESS18XX_MPSAFE == 1
-                       INTR_MPSAFE
-#else
-                       0
-#endif
-                       , ess_intr, sc, &sc->ih)) {
+       if (snd_setup_intr(dev, sc->irq, INTR_MPSAFE, ess_intr, sc, &sc->ih)) {
                device_printf(dev, "unable to map interrupt\n");
                goto no;
        }
@@ -1032,11 +1009,7 @@ ess_attach(device_t dev)
                        /*maxsize*/sc->bufsz, /*nsegments*/1,
                        /*maxsegz*/0x3ffff,
                        /*flags*/0,
-#if ESS18XX_MPSAFE == 1
                        /*lockfunc*/NULL, /*lockarg*/NULL,
-#else
-                       /*lockfunc*/busdma_lock_mutex, /*lockarg*/&Giant,
-#endif
                        &sc->parent_dmat) != 0) {
                device_printf(dev, "unable to create dma tag\n");
                goto no;
diff --git a/sys/dev/sound/pci/t4dwave.c b/sys/dev/sound/pci/t4dwave.c
index 08edb53b11a0..b30d269f5eef 100644
--- a/sys/dev/sound/pci/t4dwave.c
+++ b/sys/dev/sound/pci/t4dwave.c
@@ -913,8 +913,8 @@ tr_pci_attach(device_t dev)
                /*highaddr*/BUS_SPACE_MAXADDR,
                /*filter*/NULL, /*filterarg*/NULL,
                /*maxsize*/tr->bufsz, /*nsegments*/1, /*maxsegz*/tr->bufsz,
-               /*flags*/0, /*lockfunc*/busdma_lock_mutex,
-               /*lockarg*/&Giant, &tr->parent_dmat) != 0) {
+               /*flags*/0, /*lockfunc*/NULL, /*lockarg*/NULL,
+               &tr->parent_dmat) != 0) {
                device_printf(dev, "unable to create dma tag\n");
                goto bad;
        }
diff --git a/sys/dev/sound/pci/vibes.c b/sys/dev/sound/pci/vibes.c
index a46efb061a8f..931de7300a3b 100644
--- a/sys/dev/sound/pci/vibes.c
+++ b/sys/dev/sound/pci/vibes.c
@@ -776,8 +776,8 @@ sv_attach(device_t dev) {
                                /*filter*/NULL, /*filterarg*/NULL,
                                /*maxsize*/sc->bufsz, /*nsegments*/1,
                                /*maxsegz*/0x3ffff, /*flags*/0,
-                              /*lockfunc*/busdma_lock_mutex,
-                              /*lockarg*/&Giant, &sc->parent_dmat) != 0) {
+                              /*lockfunc*/NULL, /*lockarg*/NULL,
+                              &sc->parent_dmat) != 0) {
                 device_printf(dev, "sv_attach: Unable to create dma tag\n");
                 goto fail;
         }
diff --git a/sys/dev/sound/pcm/buffer.c b/sys/dev/sound/pcm/buffer.c
index b86b67e44344..14fc098d6b33 100644
--- a/sys/dev/sound/pcm/buffer.c
+++ b/sys/dev/sound/pcm/buffer.c
@@ -107,7 +107,7 @@ sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, int 
dmaflags,
                return (ENOMEM);
        }
        if (bus_dmamap_load(b->dmatag, b->dmamap, b->buf, b->maxsize,
-           sndbuf_setmap, b, 0) != 0 || b->buf_addr == 0) {
+           sndbuf_setmap, b, BUS_DMA_NOWAIT) != 0 || b->buf_addr == 0) {
                sndbuf_free(b);
                return (ENOMEM);
        }
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