[PATCH 3/5] drm/radeon: Raise msi_addr_mask to 40 bits for pre-Bonaire

[Vivian Wang]

The code was originally written using no_64bit_msi, which restricts the
device to 32-bit MSI addresses.

Since msi_addr_mask is introduced, use DMA_BIT_MASK(40) instead of
DMA_BIT_MASK(32) here for msi_addr_mask, describing the restriction more
precisely and allowing these devices to work on platforms with MSI
doorbell address above 32-bit space, as long as it is within the
hardware restriction of 40-bit space.

Signed-off-by: Vivian Wang <wangruikang@xxxxxxxxxxx>
---
 drivers/gpu/drm/radeon/radeon_irq_kms.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
index d550554a6f3f..ea519d43348b 100644
--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -251,8 +251,8 @@ static bool radeon_msi_ok(struct radeon_device *rdev)
 	 * IBM POWER servers, so we limit them
 	 */
 	if (rdev->family < CHIP_BONAIRE) {
-		dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n");
-		rdev->pdev->msi_addr_mask = DMA_BIT_MASK(32);
+		dev_info(rdev->dev, "radeon: MSI limited to 40-bit\n");
+		rdev->pdev->msi_addr_mask = DMA_BIT_MASK(40);
 	}
 
 	/* force MSI on */

-- 
2.51.2