From c919a3069c775c1c876bec55e00b2305d5125caa Mon Sep 17 00:00:00 2001 From: Ethan Zonca Date: Fri, 24 Feb 2017 11:27:36 -0500 Subject: can: gs_usb: Don't use stack memory for USB transfers Fixes: 05ca5270005c can: gs_usb: add ethtool set_phys_id callback to locate physical device The gs_usb driver is performing USB transfers using buffers allocated on the stack. This causes the driver to not function with vmapped stacks. Instead, allocate memory for the transfer buffers. Signed-off-by: Ethan Zonca Cc: linux-stable # >= v4.8 Signed-off-by: Marc Kleine-Budde --- drivers/net/can/usb/gs_usb.c | 40 +++++++++++++++++++++++++++++----------- 1 file changed, 29 insertions(+), 11 deletions(-) diff --git a/drivers/net/can/usb/gs_usb.c b/drivers/net/can/usb/gs_usb.c index 77e3cc06a30c..a0dabd4038ba 100644 --- a/drivers/net/can/usb/gs_usb.c +++ b/drivers/net/can/usb/gs_usb.c @@ -908,10 +908,14 @@ static int gs_usb_probe(struct usb_interface *intf, struct gs_usb *dev; int rc = -ENOMEM; unsigned int icount, i; - struct gs_host_config hconf = { - .byte_order = 0x0000beef, - }; - struct gs_device_config dconf; + struct gs_host_config *hconf; + struct gs_device_config *dconf; + + hconf = kmalloc(sizeof(*hconf), GFP_KERNEL); + if (!hconf) + return -ENOMEM; + + hconf->byte_order = 0x0000beef; /* send host config */ rc = usb_control_msg(interface_to_usbdev(intf), @@ -920,16 +924,22 @@ static int gs_usb_probe(struct usb_interface *intf, USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE, 1, intf->altsetting[0].desc.bInterfaceNumber, - &hconf, - sizeof(hconf), + hconf, + sizeof(*hconf), 1000); + kfree(hconf); + if (rc < 0) { dev_err(&intf->dev, "Couldn't send data format (err=%d)\n", rc); return rc; } + dconf = kmalloc(sizeof(*dconf), GFP_KERNEL); + if (!dconf) + return -ENOMEM; + /* read device config */ rc = usb_control_msg(interface_to_usbdev(intf), usb_rcvctrlpipe(interface_to_usbdev(intf), 0), @@ -937,28 +947,33 @@ static int gs_usb_probe(struct usb_interface *intf, USB_DIR_IN|USB_TYPE_VENDOR|USB_RECIP_INTERFACE, 1, intf->altsetting[0].desc.bInterfaceNumber, - &dconf, - sizeof(dconf), + dconf, + sizeof(*dconf), 1000); if (rc < 0) { dev_err(&intf->dev, "Couldn't get device config: (err=%d)\n", rc); + kfree(dconf); return rc; } - icount = dconf.icount + 1; + icount = dconf->icount + 1; dev_info(&intf->dev, "Configuring for %d interfaces\n", icount); if (icount > GS_MAX_INTF) { dev_err(&intf->dev, "Driver cannot handle more that %d CAN interfaces\n", GS_MAX_INTF); + kfree(dconf); return -EINVAL; } dev = kzalloc(sizeof(*dev), GFP_KERNEL); - if (!dev) + if (!dev) { + kfree(dconf); return -ENOMEM; + } + init_usb_anchor(&dev->rx_submitted); atomic_set(&dev->active_channels, 0); @@ -967,7 +982,7 @@ static int gs_usb_probe(struct usb_interface *intf, dev->udev = interface_to_usbdev(intf); for (i = 0; i < icount; i++) { - dev->canch[i] = gs_make_candev(i, intf, &dconf); + dev->canch[i] = gs_make_candev(i, intf, dconf); if (IS_ERR_OR_NULL(dev->canch[i])) { /* save error code to return later */ rc = PTR_ERR(dev->canch[i]); @@ -978,12 +993,15 @@ static int gs_usb_probe(struct usb_interface *intf, gs_destroy_candev(dev->canch[i]); usb_kill_anchored_urbs(&dev->rx_submitted); + kfree(dconf); kfree(dev); return rc; } dev->canch[i]->parent = dev; } + kfree(dconf); + return 0; } -- cgit v1.2.3 From 540a27aef355e3fd8c598600d4a3c8f92127ee05 Mon Sep 17 00:00:00 2001 From: Ethan Zonca Date: Fri, 24 Feb 2017 11:00:34 -0500 Subject: can: gs_usb: fix coding style This patch fixes five minor style issues, spaces are between bitwise OR operators. Signed-off-by: Ethan Zonca Signed-off-by: Marc Kleine-Budde --- drivers/net/can/usb/gs_usb.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/drivers/net/can/usb/gs_usb.c b/drivers/net/can/usb/gs_usb.c index a0dabd4038ba..300349fe8dc0 100644 --- a/drivers/net/can/usb/gs_usb.c +++ b/drivers/net/can/usb/gs_usb.c @@ -258,7 +258,7 @@ static int gs_cmd_reset(struct gs_usb *gsusb, struct gs_can *gsdev) rc = usb_control_msg(interface_to_usbdev(intf), usb_sndctrlpipe(interface_to_usbdev(intf), 0), GS_USB_BREQ_MODE, - USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE, + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, gsdev->channel, 0, dm, @@ -432,7 +432,7 @@ static int gs_usb_set_bittiming(struct net_device *netdev) rc = usb_control_msg(interface_to_usbdev(intf), usb_sndctrlpipe(interface_to_usbdev(intf), 0), GS_USB_BREQ_BITTIMING, - USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE, + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, dev->channel, 0, dbt, @@ -546,7 +546,6 @@ static netdev_tx_t gs_can_start_xmit(struct sk_buff *skb, hf, urb->transfer_dma); - if (rc == -ENODEV) { netif_device_detach(netdev); } else { @@ -804,7 +803,7 @@ static struct gs_can *gs_make_candev(unsigned int channel, rc = usb_control_msg(interface_to_usbdev(intf), usb_rcvctrlpipe(interface_to_usbdev(intf), 0), GS_USB_BREQ_BT_CONST, - USB_DIR_IN|USB_TYPE_VENDOR|USB_RECIP_INTERFACE, + USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, channel, 0, bt_const, @@ -921,7 +920,7 @@ static int gs_usb_probe(struct usb_interface *intf, rc = usb_control_msg(interface_to_usbdev(intf), usb_sndctrlpipe(interface_to_usbdev(intf), 0), GS_USB_BREQ_HOST_FORMAT, - USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE, + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, 1, intf->altsetting[0].desc.bInterfaceNumber, hconf, @@ -944,7 +943,7 @@ static int gs_usb_probe(struct usb_interface *intf, rc = usb_control_msg(interface_to_usbdev(intf), usb_rcvctrlpipe(interface_to_usbdev(intf), 0), GS_USB_BREQ_DEVICE_CONFIG, - USB_DIR_IN|USB_TYPE_VENDOR|USB_RECIP_INTERFACE, + USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, 1, intf->altsetting[0].desc.bInterfaceNumber, dconf, -- cgit v1.2.3 From 7c42631376306fb3f34d51fda546b50a9b6dd6ec Mon Sep 17 00:00:00 2001 From: Marc Kleine-Budde Date: Thu, 2 Mar 2017 12:03:40 +0100 Subject: can: usb_8dev: Fix memory leak of priv->cmd_msg_buffer The priv->cmd_msg_buffer is allocated in the probe function, but never kfree()ed. This patch converts the kzalloc() to resource-managed kzalloc. Cc: linux-stable Signed-off-by: Marc Kleine-Budde --- drivers/net/can/usb/usb_8dev.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/net/can/usb/usb_8dev.c b/drivers/net/can/usb/usb_8dev.c index 108a30e15097..d000cb62d6ae 100644 --- a/drivers/net/can/usb/usb_8dev.c +++ b/drivers/net/can/usb/usb_8dev.c @@ -951,8 +951,8 @@ static int usb_8dev_probe(struct usb_interface *intf, for (i = 0; i < MAX_TX_URBS; i++) priv->tx_contexts[i].echo_index = MAX_TX_URBS; - priv->cmd_msg_buffer = kzalloc(sizeof(struct usb_8dev_cmd_msg), - GFP_KERNEL); + priv->cmd_msg_buffer = devm_kzalloc(&intf->dev, sizeof(struct usb_8dev_cmd_msg), + GFP_KERNEL); if (!priv->cmd_msg_buffer) goto cleanup_candev; @@ -966,7 +966,7 @@ static int usb_8dev_probe(struct usb_interface *intf, if (err) { netdev_err(netdev, "couldn't register CAN device: %d\n", err); - goto cleanup_cmd_msg_buffer; + goto cleanup_candev; } err = usb_8dev_cmd_version(priv, &version); @@ -987,9 +987,6 @@ static int usb_8dev_probe(struct usb_interface *intf, cleanup_unregister_candev: unregister_netdev(priv->netdev); -cleanup_cmd_msg_buffer: - kfree(priv->cmd_msg_buffer); - cleanup_candev: free_candev(netdev); -- cgit v1.2.3 From 66ddb82129df66a94219844c509074adb4330a28 Mon Sep 17 00:00:00 2001 From: Marc Kleine-Budde Date: Thu, 2 Mar 2017 15:42:49 +0100 Subject: can: flexcan: fix typo in comment This patch fixes the typo "Disble" -> "Disable". Signed-off-by: Marc Kleine-Budde --- drivers/net/can/flexcan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c index ea57fed375c6..13f0f219d8aa 100644 --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -196,7 +196,7 @@ #define FLEXCAN_QUIRK_BROKEN_ERR_STATE BIT(1) /* [TR]WRN_INT not connected */ #define FLEXCAN_QUIRK_DISABLE_RXFG BIT(2) /* Disable RX FIFO Global mask */ #define FLEXCAN_QUIRK_ENABLE_EACEN_RRS BIT(3) /* Enable EACEN and RRS bit in ctrl2 */ -#define FLEXCAN_QUIRK_DISABLE_MECR BIT(4) /* Disble Memory error detection */ +#define FLEXCAN_QUIRK_DISABLE_MECR BIT(4) /* Disable Memory error detection */ #define FLEXCAN_QUIRK_USE_OFF_TIMESTAMP BIT(5) /* Use timestamp based offloading */ /* Structure of the message buffer */ -- cgit v1.2.3