[PATCH v2] ALSA: emu10k1: Stop using iommu_present()

[Robin Murphy]

iommu_get_domain_for_dev() is already perfectly happy to return NULL
if the given device has no IOMMU. Drop the unnecessary check in favour
of just handling that condition appropriately.

Signed-off-by: Robin Murphy <robin.murphy at arm.com>
---

v2: Get "!domain" condition right

 sound/pci/emu10k1/emu10k1_main.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/sound/pci/emu10k1/emu10k1_main.c b/sound/pci/emu10k1/emu10k1_main.c
index 86cc1ca025e4..3880f359e688 100644
--- a/sound/pci/emu10k1/emu10k1_main.c
+++ b/sound/pci/emu10k1/emu10k1_main.c
@@ -1751,11 +1751,8 @@ static void snd_emu10k1_detect_iommu(struct snd_emu10k1 *emu)
 
 	emu->iommu_workaround = false;
 
-	if (!iommu_present(emu->card->dev->bus))
-		return;
-
 	domain = iommu_get_domain_for_dev(emu->card->dev);
-	if (domain && domain->type == IOMMU_DOMAIN_IDENTITY)
+	if (!domain || domain->type == IOMMU_DOMAIN_IDENTITY)
 		return;
 
 	dev_notice(emu->card->dev,
-- 
2.28.0.dirty