From 750fae232480fee9d799eaced198ec98c20769a3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Thu, 7 Sep 2017 17:32:03 +0300
Subject: [PATCH] i915: Fix obj size vs. alignment for drm_pci_alloc()
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Git-commit: 750fae232480fee9d799eaced198ec98c20769a3
Patch-mainline: v4.15-rc1
References: FATE#322643 bsc#1055900

drm_pci_alloc() refuses to cooperate if the passed alignment exceeds the
object size. So round up the obj size to the next power of two as well
to make this actually work.

Obviously things work just fine as long as the size was a power of two
to begin with. However kms_cursor_crc doesn't always use power of two
sizes so we hit a failure when we try to allocate the phys memory.

Testcase: igt/kms_cursor_crc
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170907143203.13055-1-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/i915/i915_gem.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -179,7 +179,7 @@ i915_gem_object_get_pages_phys(struct dr
 	 * the alignment of the buddy allocation will naturally match.
 	 */
 	phys = drm_pci_alloc(obj->base.dev,
-			     obj->base.size,
+			     roundup_pow_of_two(obj->base.size),
 			     roundup_pow_of_two(obj->base.size));
 	if (!phys)
 		return ERR_PTR(-ENOMEM);