[v2,1/3] ALSA: hdsp: don't disable if not enabled

Commit Message

Tong Zhang March 20, 2021, 10:23 p.m. UTC

hdsp wants to disable a not enabled pci device, which makes kernel
throw a warning. Make sure the device is enabled before calling disable.

[    1.758292] snd_hdsp 0000:00:03.0: disabling already-disabled device
[    1.758327] WARNING: CPU: 0 PID: 180 at drivers/pci/pci.c:2146 pci_disable_device+0x91/0xb0
[    1.766985] Call Trace:
[    1.767121]  snd_hdsp_card_free+0x94/0xf0 [snd_hdsp]
[    1.767388]  release_card_device+0x4b/0x80 [snd]
[    1.767639]  device_release+0x3b/0xa0
[    1.767838]  kobject_put+0x94/0x1b0
[    1.768027]  put_device+0x13/0x20
[    1.768207]  snd_card_free+0x61/0x90 [snd]
[    1.768430]  snd_hdsp_probe+0x524/0x5e0 [snd_hdsp]

Signed-off-by: Tong Zhang <[e-mail]>
---
 sound/pci/rme9652/hdsp.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

Patch

diff --git a/sound/pci/rme9652/hdsp.c b/sound/pci/rme9652/hdsp.c
index 4cf879c42dc4..d9879a5bd60e 100644
--- a/sound/pci/rme9652/hdsp.c
+++ b/sound/pci/rme9652/hdsp.c
@@ -5285,8 +5285,10 @@  static int snd_hdsp_create(struct snd_card *card,
 
 	pci_set_master(hdsp->pci);
 
-	if ((err = pci_request_regions(pci, "hdsp")) < 0)
+	if ((err = pci_request_regions(pci, "hdsp")) < 0) {
+		pci_disable_device(pci);
 		return err;
+	}
 	hdsp->port = pci_resource_start(pci, 0);
 	if ((hdsp->iobase = ioremap(hdsp->port, HDSP_IO_EXTENT)) == NULL) {
 		dev_err(hdsp->card->dev, "unable to remap region 0x%lx-0x%lx\n",
@@ -5387,10 +5389,10 @@  static int snd_hdsp_free(struct hdsp *hdsp)
 	vfree(hdsp->fw_uploaded);
 	iounmap(hdsp->iobase);
 
-	if (hdsp->port)
+	if (hdsp->port) {
 		pci_release_regions(hdsp->pci);
-
-	pci_disable_device(hdsp->pci);
+		pci_disable_device(hdsp->pci);
+	}
 	return 0;
 }