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Diffstat (limited to 'sound/pci/hda/hda_intel.c')
-rw-r--r--sound/pci/hda/hda_intel.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 8f3e5e9d8bdb..e6de496bffbe 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2166,7 +2166,20 @@ static void azx_remove(struct pci_dev *pci)
/* cancel the pending probing work */
chip = card->private_data;
hda = container_of(chip, struct hda_intel, chip);
+ /* FIXME: below is an ugly workaround.
+ * Both device_release_driver() and driver_probe_device()
+ * take *both* the device's and its parent's lock before
+ * calling the remove() and probe() callbacks. The codec
+ * probe takes the locks of both the codec itself and its
+ * parent, i.e. the PCI controller dev. Meanwhile, when
+ * the PCI controller is unbound, it takes its lock, too
+ * ==> ouch, a deadlock!
+ * As a workaround, we unlock temporarily here the controller
+ * device during cancel_work_sync() call.
+ */
+ device_unlock(&pci->dev);
cancel_work_sync(&hda->probe_work);
+ device_lock(&pci->dev);
snd_card_free(card);
}