From: Tejas Upadhyay tejas.upadhyay@intel.com
[ Upstream commit ed00eba03474adbf525ff03d69705d8c78b76456 ]
lock the fbdev obj before calling into i915_vma_pin_iomap(). This helps to solve below :
<7>[ 93.563308] i915 0000:00:02.0: [drm:intelfb_create [i915]] no BIOS fb, allocating a new one <4>[ 93.581844] ------------[ cut here ]------------ <4>[ 93.581855] WARNING: CPU: 12 PID: 625 at drivers/gpu/drm/i915/gem/i915_gem_pages.c:424 i915_gem_object_pin_map+0x152/0x1c0 [i915]
Fixes: f0b6b01b3efe ("drm/i915: Add ww context to intel_dpt_pin, v2.") Cc: Chris Wilson chris.p.wilson@intel.com Cc: Matthew Auld matthew.auld@intel.com Cc: Maarten Lankhorst maarten.lankhorst@linux.intel.com Signed-off-by: Tejas Upadhyay tejas.upadhyay@intel.com Signed-off-by: Radhakrishna Sripada radhakrishna.sripada@intel.com Reviewed-by: Andi Shyti andi.shyti@linux.intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20230301201053.928709-5-radhak... (cherry picked from commit 561b31acfd65502a2cda2067513240fc57ccdbdc) Signed-off-by: Jani Nikula jani.nikula@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/i915/display/intel_fbdev.c | 24 ++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c index 17e8bf2ac0e51..3a708bd73a000 100644 --- a/drivers/gpu/drm/i915/display/intel_fbdev.c +++ b/drivers/gpu/drm/i915/display/intel_fbdev.c @@ -210,6 +210,7 @@ static int intelfb_create(struct drm_fb_helper *helper, bool prealloc = false; void __iomem *vaddr; struct drm_i915_gem_object *obj; + struct i915_gem_ww_ctx ww; int ret;
mutex_lock(&ifbdev->hpd_lock); @@ -290,13 +291,24 @@ static int intelfb_create(struct drm_fb_helper *helper, info->fix.smem_len = vma->size; }
- vaddr = i915_vma_pin_iomap(vma); - if (IS_ERR(vaddr)) { - drm_err(&dev_priv->drm, - "Failed to remap framebuffer into virtual memory (%pe)\n", vaddr); - ret = PTR_ERR(vaddr); - goto out_unpin; + for_i915_gem_ww(&ww, ret, false) { + ret = i915_gem_object_lock(vma->obj, &ww); + + if (ret) + continue; + + vaddr = i915_vma_pin_iomap(vma); + if (IS_ERR(vaddr)) { + drm_err(&dev_priv->drm, + "Failed to remap framebuffer into virtual memory (%pe)\n", vaddr); + ret = PTR_ERR(vaddr); + continue; + } } + + if (ret) + goto out_unpin; + info->screen_base = vaddr; info->screen_size = vma->size;