From: Felix Kuehling <Felix.Kuehling@amd.com>
Date: Thu, 18 Jan 2018 04:52:03 +0000 (-0500)
Subject: drm/ttm: Don't add swapped BOs to swap-LRU list
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3176b3a9ebc2598e8efb31c3fc89634cc202a862;p=pandora-kernel.git

drm/ttm: Don't add swapped BOs to swap-LRU list

commit fd5002d6a3c602664b07668a24df4ef7a43bf078 upstream.

A BO that's already swapped would be added back to the swap-LRU list
for example if its validation failed under high memory pressure. This
could later lead to swapping it out again and leaking previous swap
storage.

This commit adds a condition to prevent that from happening.

v2: Check page_flags instead of swap_storage

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[bwh: Backported to 3.2: We aren't checking for TTM_PAGE_FLAG_SG here as that's
 not defined]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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