From: Konrad Rzeszutek Wilk Date: Thu, 12 Jan 2012 16:50:26 +0000 (-0500) Subject: ttm/dma: Remove the WARN() which is not useful. X-Git-Tag: firefly_0821_release~3680^2~3722^2~9 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=0e1133157986340e80a1c65ebf3bd20b74eb8075;p=firefly-linux-kernel-4.4.55.git ttm/dma: Remove the WARN() which is not useful. . It was useful during development, but now on a production system we can get this (if the user forgot to upload the firmware): [drm] radeon: irq initialized. [drm] GART: num cpu pages 131072, num gpu pages 131072 [drm] radeon: ib pool ready. [drm] Loading SUMO Microcode r600_cp: Failed to load firmware "radeon/SUMO_pfp.bin" atl1c 0000:03:00.0: version 1.0.1.0-NAPI.213057] [drm:evergreen_startup] *ERROR* Failed to load firmware! radeon 0000:00:01.0: disabling GPU acceleration 88] radeon 0000:00:01.0: ffff8801bb782400 unpin not necessary ------------[ cut here ]------------ WARNING: at /home/konrad/linux-linus/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c:956 ttm_dma_unpopulate+0x79/0x300 [ttm]() Hardware name: System Product Name Modules linked in: e1000e atl1c radeon(+) ahci libahci libata scsi_mod fbcon tileblit font ttm bitblit softcursor drm_kms_helper wmi xen_blkfront xen_netfront fb_sys_fops sysimgblt sysfillrect syscopyarea xenfs xen_privcmd Pid: 1600, comm: modprobe Not tainted 3.2.0-06100-ge343a89 #1 Call Trace: [] warn_slowpath_common+0x7a/0xb0 [] warn_slowpath_null+0x15/0x20 [] ttm_dma_unpopulate+0x79/0x300 [ttm] [] radeon_ttm_tt_unpopulate+0x120/0x130 [radeon] [] ttm_tt_destroy+0x2c/0x70 [ttm] [] ttm_bo_cleanup_memtype_use+0x3e/0x80 [ttm] [] ttm_bo_release+0x251/0x280 [ttm] [] ttm_bo_unref+0x40/0x60 [ttm] [] radeon_bo_unref+0x42/0x80 [radeon] [] radeon_sa_bo_manager_fini+0x6b/0x80 [radeon] [] radeon_ib_pool_fini+0x6f/0x90 [radeon] [] r100_ib_fini+0x19/0x20 [radeon] [] evergreen_init+0x1ee/0x2d0 [radeon] The big WARN() has nothing to do with the culprit - which is that the firmware was not loaded. So lets remove the WARN() from the TTM DMA code. Signed-off-by: Konrad Rzeszutek Wilk Reviewed-by: Jerome Glisse Signed-off-by: Dave Airlie --- diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c index 37ead6995c87..0c46d8cdc6ea 100644 --- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c +++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c @@ -952,10 +952,9 @@ void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev) type = ttm_to_type(ttm->page_flags, ttm->caching_state); pool = ttm_dma_find_pool(dev, type); - if (!pool) { - WARN_ON(!pool); + if (!pool) return; - } + is_cached = (ttm_dma_find_pool(pool->dev, ttm_to_type(ttm->page_flags, tt_cached)) == pool);