The call to sdma_pcm_platform_register() can return PROBE_DEFER, leading
to omap_mcbsp_init() being called multiple times. sysfs node creation
fails in subsequent calls to omap_mcbsp_init(), which prevents
the driver from ever successfully probing. The resulting errors can be
seen during boot:
[ 1.749328] sysfs: cannot create duplicate filename '/devices/platform/68000000.ocp/49022000.mcbsp/max_tx_thres'
[ 1.759643] CPU: 0 PID: 6 Comm: kworker/u2:0 Not tainted 5.18.0-yocto-standard #1
[ 1.767181] Hardware name: Generic OMAP36xx (Flattened Device Tree)
[ 1.773498] Workqueue: events_unbound deferred_probe_work_func
[ 1.779449] unwind_backtrace from show_stack+0x10/0x14
[ 1.784729] show_stack from sysfs_warn_dup+0x4c/0x60
[ 1.789825] sysfs_warn_dup from sysfs_add_file_mode_ns+0x104/0x150
[ 1.796142] sysfs_add_file_mode_ns from internal_create_group+0x10c/0x3ac
[ 1.803100] internal_create_group from asoc_mcbsp_probe+0x270/0x454
[ 1.809539] asoc_mcbsp_probe from platform_probe+0x58/0xb8
[ 1.815155] platform_probe from really_probe+0x14c/0x34c
[ 1.820617] really_probe from __driver_probe_device+0xcc/0x1c0
[ 1.826599] __driver_probe_device from driver_probe_device+0x30/0xd4
[ 1.833129] driver_probe_device from __device_attach_driver+0x8c/0xf0
[ 1.839721] __device_attach_driver from bus_for_each_drv+0x80/0xcc
[ 1.846038] bus_for_each_drv from __device_attach+0xe4/0x170
[ 1.851837] __device_attach from bus_probe_device+0x84/0x8c
[ 1.857543] bus_probe_device from deferred_probe_work_func+0x9c/0xc8
[ 1.864044] deferred_probe_work_func from process_one_work+0x194/0x3b8
[ 1.870727] process_one_work from worker_thread+0x200/0x4cc
[ 1.876434] worker_thread from kthread+0xb8/0xdc
[ 1.881195] kthread from ret_from_fork+0x14/0x2c
[ 1.885955] Exception stack(0xc1069fb0 to 0xc1069ff8)
[ 1.891052] 9fa0: 00000000 00000000 00000000 00000000
[ 1.899291] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.907501] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 1.914215] omap-mcbsp 49022000.mcbsp: Unable to create additional controls
[ 1.921264] omap-mcbsp: probe of 49022000.mcbsp failed with error -17
[ 1.928405] omap-twl4030 sound: devm_snd_soc_register_card() failed: -517
Signed-off-by: David Owens <dowens@xxxxxxxxxxxxxxxxxxxxx>
---
sound/soc/ti/omap-mcbsp.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/sound/soc/ti/omap-mcbsp.c b/sound/soc/ti/omap-mcbsp.c
index 4479d74f0a45..b7c1fb70cb25 100644
--- a/sound/soc/ti/omap-mcbsp.c
+++ b/sound/soc/ti/omap-mcbsp.c
@@ -1403,6 +1403,10 @@ static int asoc_mcbsp_probe(struct platform_device *pdev)
mcbsp->dev = &pdev->dev;
platform_set_drvdata(pdev, mcbsp);
+ ret = sdma_pcm_platform_register(&pdev->dev, "tx", "rx");
+ if (ret)
+ return ret;
+
ret = omap_mcbsp_init(pdev);
if (ret)
return ret;
@@ -1412,13 +1416,9 @@ static int asoc_mcbsp_probe(struct platform_device *pdev)
omap_mcbsp_dai.capture.formats = SNDRV_PCM_FMTBIT_S16_LE;
}
- ret = devm_snd_soc_register_component(&pdev->dev,
+ return devm_snd_soc_register_component(&pdev->dev,
&omap_mcbsp_component,
&omap_mcbsp_dai, 1);
- if (ret)
- return ret;
-
- return sdma_pcm_platform_register(&pdev->dev, "tx", "rx");
}
static int asoc_mcbsp_remove(struct platform_device *pdev)
--
2.34.1
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