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 98F432E5B09; Tue, 8 Jul 2025 16:59:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751993975; cv=none; b=AoUGqnq/UUmUW9mbAKM9//blLATY04VwiRLyWA1cjsd2tlUiWEmtyD8pF3CfQ9TBzkfO9QavW5y4tBx7j4MRo9uDlt8UdfSFNRBrdZYRrpKtY0/66HRuhPZfPtItl30/5LfV8GP4eW/21JE6slFDwdl8crLiD6f63tVdbW3Z6tA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751993975; c=relaxed/simple; bh=fw6X2TlMemsczCOsNDZPixRUmknJmQc5zVkXTMsAQAQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZLwh5tnq/flHUx4dwYpIfy4HsA3xoLF1Mldj8Mo/dPdHdEFYBgZetX+eHbpr+962V3cBpBLhDv2stUwDCDvVtoOTHE9zqwxhXfL5UkxwbUaYjQk9ZTk8zSsFqGWR8wHGgI5e9SMA5MdBcac47TAEx224hhZfDQsm55h8Ufv7JMo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=L0DKlPQK; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="L0DKlPQK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 215BDC4CEED; Tue, 8 Jul 2025 16:59:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1751993975; bh=fw6X2TlMemsczCOsNDZPixRUmknJmQc5zVkXTMsAQAQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=L0DKlPQKs1jK2X4WcBPQuHJYyNF60nACssLlaOT+Qhhtjw2pOW0KgBpEAggjm5os+ +B2Uacg6tyzVrEneFCZ0x5KeuJbs2WA35Jb5JlJJBC+BTZtmaJpX22cubiH0cCuk2q 8lmpawkHKdcX/AcJwBl8O6AMzZ8tvtEK9omm37tg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jay Cornwall , Harish Kasiviswanathan , Alex Deucher Subject: [PATCH 5.15 083/160] drm/amdkfd: Fix race in GWS queue scheduling Date: Tue, 8 Jul 2025 18:22:00 +0200 Message-ID: <20250708162233.828574970@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250708162231.503362020@linuxfoundation.org> References: <20250708162231.503362020@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jay Cornwall commit cfb05257ae168a0496c7637e1d9e3ab8a25cbffe upstream. q->gws is not updated atomically with qpd->mapped_gws_queue. If a runlist is created between pqm_set_gws and update_queue it will contain a queue which uses GWS in a process with no GWS allocated. This will result in a scheduler hang. Use q->properties.is_gws which is changed while holding the DQM lock. Signed-off-by: Jay Cornwall Reviewed-by: Harish Kasiviswanathan Signed-off-by: Alex Deucher (cherry picked from commit b98370220eb3110e82248e3354e16a489a492cfb) Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_v9.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_v9.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_v9.c @@ -195,7 +195,7 @@ static int pm_map_queues_v9(struct packe packet->bitfields2.engine_sel = engine_sel__mes_map_queues__compute_vi; - packet->bitfields2.gws_control_queue = q->gws ? 1 : 0; + packet->bitfields2.gws_control_queue = q->properties.is_gws ? 1 : 0; packet->bitfields2.extended_engine_sel = extended_engine_sel__mes_map_queues__legacy_engine_sel; packet->bitfields2.queue_type =