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[2001:1c01:2f03:7200:763c:d807:63d8:4d15]) by smtp.gmail.com with ESMTPSA id o14sm12855316eja.121.2020.07.14.08.02.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 14 Jul 2020 08:02:35 -0700 (PDT) To: alsa-devel@alsa-project.org From: =?UTF-8?Q?Ren=c3=a9_Herman?= Subject: [snd-usb-6fire] Move DMA-buffer off of the stack Message-ID: <1e255a15-b0ff-088b-2ac2-8f2fc68bfbeb@gmail.com> Date: Tue, 14 Jul 2020 17:02:34 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------096A0602DC2CEC2614F888FD" Content-Language: en-US Cc: Torsten Schenk X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" This is a multi-part message in MIME format. --------------096A0602DC2CEC2614F888FD Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit snd-usb-fire currently fails its firmware load with "transfer buffer not dma capable". Move said buffer off of the stack (has been coordinated with the original driver author Torsten Schenk) Signed-off-by: René Herman --------------096A0602DC2CEC2614F888FD Content-Type: text/x-patch; charset=UTF-8; name="0001-snd-usb-6fire-Move-DMA-buffer-off-the-stack.patch" Content-Transfer-Encoding: 8bit Content-Disposition: attachment; filename="0001-snd-usb-6fire-Move-DMA-buffer-off-the-stack.patch" >From 6a732ea2536217e1aa35c55c966df0e7873d95ca Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ren=C3=A9=20Herman?= Date: Sun, 12 Jul 2020 01:22:45 +0200 Subject: [PATCH 1/3] [snd-usb-6fire] Move DMA-buffer off the stack MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit snd-usb-fire currently fails its firmware load with "transfer buffer not dma capable". Move said buffer off of the stack. Signed-off-by: René Herman --- sound/usb/6fire/firmware.c | 95 ++++++++++++++++++-------------------- 1 file changed, 46 insertions(+), 49 deletions(-) diff --git a/sound/usb/6fire/firmware.c b/sound/usb/6fire/firmware.c index 69137c14d0dc..502653a89f01 100644 --- a/sound/usb/6fire/firmware.c +++ b/sound/usb/6fire/firmware.c @@ -355,63 +355,60 @@ static int usb6fire_fw_check(struct usb_interface *intf, const u8 *version) int usb6fire_fw_init(struct usb_interface *intf) { - int i; - int ret; struct usb_device *device = interface_to_usbdev(intf); + int ret, i; + /* buffer: 8 receiving bytes from device and * sizeof(EP_W_MAX_PACKET_SIZE) bytes for non-const copy */ - u8 buffer[12]; + u8 *buffer = kmalloc(12, GFP_KERNEL); + + if (!buffer) + return -ENOMEM; ret = usb6fire_fw_ezusb_read(device, 1, 0, buffer, 8); if (ret < 0) { dev_err(&intf->dev, "unable to receive device firmware state.\n"); - return ret; - } - if (buffer[0] != 0xeb || buffer[1] != 0xaa || buffer[2] != 0x55) { - dev_err(&intf->dev, - "unknown device firmware state received from device:"); - for (i = 0; i < 8; i++) - printk(KERN_CONT "%02x ", buffer[i]); - printk(KERN_CONT "\n"); - return -EIO; - } - /* do we need fpga loader ezusb firmware? */ - if (buffer[3] == 0x01) { - ret = usb6fire_fw_ezusb_upload(intf, - "6fire/dmx6firel2.ihx", 0, NULL, 0); - if (ret < 0) - return ret; - return FW_NOT_READY; + goto out; } - /* do we need fpga firmware and application ezusb firmware? */ - else if (buffer[3] == 0x02) { - ret = usb6fire_fw_check(intf, buffer + 4); - if (ret < 0) - return ret; - ret = usb6fire_fw_fpga_upload(intf, "6fire/dmx6firecf.bin"); - if (ret < 0) - return ret; - memcpy(buffer, ep_w_max_packet_size, - sizeof(ep_w_max_packet_size)); - ret = usb6fire_fw_ezusb_upload(intf, "6fire/dmx6fireap.ihx", - 0x0003, buffer, sizeof(ep_w_max_packet_size)); - if (ret < 0) - return ret; - return FW_NOT_READY; - } - /* all fw loaded? */ - else if (buffer[3] == 0x03) - return usb6fire_fw_check(intf, buffer + 4); - /* unknown data? */ - else { - dev_err(&intf->dev, - "unknown device firmware state received from device: "); - for (i = 0; i < 8; i++) - printk(KERN_CONT "%02x ", buffer[i]); - printk(KERN_CONT "\n"); - return -EIO; + if (buffer[0] == 0xeb && buffer[1] == 0xaa && buffer[2] == 0x55) { + /* do we need fpga loader ezusb firmware? */ + if (buffer[3] == 1) { + ret = usb6fire_fw_ezusb_upload(intf, + "6fire/dmx6firel2.ihx", 0, NULL, 0); + if (ret >= 0) + ret = FW_NOT_READY; + goto out; + } + /* do we need fpga firmware and application ezusb firmware? */ + if (buffer[3] == 2) { + ret = usb6fire_fw_check(intf, buffer + 4); + if (ret < 0) + goto out; + ret = usb6fire_fw_fpga_upload(intf, "6fire/dmx6firecf.bin"); + if (ret < 0) + goto out; + memcpy(buffer, ep_w_max_packet_size, + sizeof(ep_w_max_packet_size)); + ret = usb6fire_fw_ezusb_upload(intf, "6fire/dmx6fireap.ihx", + 0x0003, buffer, sizeof(ep_w_max_packet_size)); + if (ret >= 0) + ret = FW_NOT_READY; + goto out; + } + /* all fw loaded? */ + if (buffer[3] == 3) { + ret = usb6fire_fw_check(intf, buffer + 4); + goto out; + } } - return 0; + dev_err(&intf->dev, + "unknown device firmware state received from device: "); + for (i = 0; i < 8; i++) + printk(KERN_CONT "%02x ", buffer[i]); + printk(KERN_CONT "\n"); + ret = -EIO; + +out: kfree(buffer); + return ret; } - -- 2.17.1 --------------096A0602DC2CEC2614F888FD--