From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5B3488BE0 for ; Tue, 28 Mar 2023 14:46:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A8E20C4339E; Tue, 28 Mar 2023 14:46:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1680014791; bh=GLn6uLyg/YHSLgv4CYzx9/3mIpNnYAMKdHRBFSAylBc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=yO8JOpQuGiRUV1H+nXDKx1AGiTkDSj81BNlZRydN21YdWHIY2Vixg3XC8gKY+CQdp wesvcypPR5RSpZ27GgJ8BY9c+h0WXjiWZZAl9H6+eQ8/bh3DuWlJQ8y5qzB/BlzU5i Q9SjkXIZs5ksfRzWxtdPRSMTOmiHZGMG+PinTftI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Chris Wilson , Matthew Auld , Maarten Lankhorst , Tejas Upadhyay , Radhakrishna Sripada , Andi Shyti , Jani Nikula , Sasha Levin Subject: [PATCH 6.2 053/240] drm/i915/fbdev: lock the fbdev obj before vma pin Date: Tue, 28 Mar 2023 16:40:16 +0200 Message-Id: <20230328142621.924737301@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230328142619.643313678@linuxfoundation.org> References: <20230328142619.643313678@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Tejas Upadhyay [ 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 Cc: Matthew Auld Cc: Maarten Lankhorst Signed-off-by: Tejas Upadhyay Signed-off-by: Radhakrishna Sripada Reviewed-by: Andi Shyti Link: https://patchwork.freedesktop.org/patch/msgid/20230301201053.928709-5-radhakrishna.sripada@intel.com (cherry picked from commit 561b31acfd65502a2cda2067513240fc57ccdbdc) Signed-off-by: Jani Nikula Signed-off-by: Sasha Levin --- 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; -- 2.39.2