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linux-can-fixes-for-5.5-20191203

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Merge tag 'linux-can-fixes-for-5.5-20191203' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can

Marc Kleine-Budde says:

====================
pull-request: can 2019-12-03

this is a pull request of 6 patches for net/master.

The first two patches are against the MAINTAINERS file and adds Appana
Durga Kedareswara rao as maintainer for the xilinx-can driver and Sriram
Dash for the m_can (mmio) driver.

The next patch is by Jouni Hogander and fixes a use-after-free in the
slcan driver.

Johan Hovold's patch for the ucan driver fixes the non-atomic allocation
in the completion handler.

The last two patches target the xilinx-can driver. The first one is by
Venkatesh Yadav Abbarapu and skips the error message on deferred probe,
the second one is by Srinivas Neeli and fixes the usage of the skb after
can_put_echo_skb().
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2019-12-03 11:14:41 -08:00
commit 56e7a2f83d
4 changed files with 34 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
MAINTAINERS
View File

@ -10094,6 +10094,15 @@ W: https://linuxtv.org
S: Maintained
F: drivers/media/radio/radio-maxiradio*
MCAN MMIO DEVICE DRIVER
M: Sriram Dash <sriram.dash@samsung.com>
L: linux-can@vger.kernel.org
S: Maintained
F: Documentation/devicetree/bindings/net/can/m_can.txt
F: drivers/net/can/m_can/m_can.c
F: drivers/net/can/m_can/m_can.h
F: drivers/net/can/m_can/m_can_platform.c
MCP4018 AND MCP4531 MICROCHIP DIGITAL POTENTIOMETER DRIVERS
M: Peter Rosin <peda@axentia.se>
L: linux-iio@vger.kernel.org
@ -18103,6 +18112,14 @@ M: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
S: Maintained
F: drivers/net/ethernet/xilinx/xilinx_axienet*
XILINX CAN DRIVER
M: Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com>
R: Naga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>
L: linux-can@vger.kernel.org
S: Maintained
F: Documentation/devicetree/bindings/net/can/xilinx_can.txt
F: drivers/net/can/xilinx_can.c
XILINX UARTLITE SERIAL DRIVER
M: Peter Korsgaard <jacmet@sunsite.dk>
L: linux-serial@vger.kernel.org

1
drivers/net/can/slcan.c
View File

@ -617,6 +617,7 @@ err_free_chan:
sl->tty = NULL;
tty->disc_data = NULL;
clear_bit(SLF_INUSE, &sl->flags);
slc_free_netdev(sl->dev);
free_netdev(sl->dev);
err_exit:

2
drivers/net/can/usb/ucan.c
View File

@ -792,7 +792,7 @@ resubmit:
up);
usb_anchor_urb(urb, &up->rx_urbs);
ret = usb_submit_urb(urb, GFP_KERNEL);
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret < 0) {
netdev_err(up->netdev,

28
drivers/net/can/xilinx_can.c
View File

@ -542,16 +542,17 @@ static int xcan_do_set_mode(struct net_device *ndev, enum can_mode mode)
/**
* xcan_write_frame - Write a frame to HW
* @priv: Driver private data structure
* @ndev: Pointer to net_device structure
* @skb: sk_buff pointer that contains data to be Txed
* @frame_offset: Register offset to write the frame to
*/
static void xcan_write_frame(struct xcan_priv *priv, struct sk_buff *skb,
static void xcan_write_frame(struct net_device *ndev, struct sk_buff *skb,
int frame_offset)
{
u32 id, dlc, data[2] = {0, 0};
struct canfd_frame *cf = (struct canfd_frame *)skb->data;
u32 ramoff, dwindex = 0, i;
struct xcan_priv *priv = netdev_priv(ndev);
/* Watch carefully on the bit sequence */
if (cf->can_id & CAN_EFF_FLAG) {
@ -587,6 +588,14 @@ static void xcan_write_frame(struct xcan_priv *priv, struct sk_buff *skb,
dlc |= XCAN_DLCR_EDL_MASK;
}
if (!(priv->devtype.flags & XCAN_FLAG_TX_MAILBOXES) &&
(priv->devtype.flags & XCAN_FLAG_TXFEMP))
can_put_echo_skb(skb, ndev, priv->tx_head % priv->tx_max);
else
can_put_echo_skb(skb, ndev, 0);
priv->tx_head++;
priv->write_reg(priv, XCAN_FRAME_ID_OFFSET(frame_offset), id);
/* If the CAN frame is RTR frame this write triggers transmission
* (not on CAN FD)
@ -638,13 +647,9 @@ static int xcan_start_xmit_fifo(struct sk_buff *skb, struct net_device *ndev)
XCAN_SR_TXFLL_MASK))
return -ENOSPC;
can_put_echo_skb(skb, ndev, priv->tx_head % priv->tx_max);
spin_lock_irqsave(&priv->tx_lock, flags);
priv->tx_head++;
xcan_write_frame(priv, skb, XCAN_TXFIFO_OFFSET);
xcan_write_frame(ndev, skb, XCAN_TXFIFO_OFFSET);
/* Clear TX-FIFO-empty interrupt for xcan_tx_interrupt() */
if (priv->tx_max > 1)
@ -675,13 +680,9 @@ static int xcan_start_xmit_mailbox(struct sk_buff *skb, struct net_device *ndev)
BIT(XCAN_TX_MAILBOX_IDX)))
return -ENOSPC;
can_put_echo_skb(skb, ndev, 0);
spin_lock_irqsave(&priv->tx_lock, flags);
priv->tx_head++;
xcan_write_frame(priv, skb,
xcan_write_frame(ndev, skb,
XCAN_TXMSG_FRAME_OFFSET(XCAN_TX_MAILBOX_IDX));
/* Mark buffer as ready for transmit */
@ -1772,7 +1773,8 @@ static int xcan_probe(struct platform_device *pdev)
priv->bus_clk = devm_clk_get(&pdev->dev, devtype->bus_clk_name);
if (IS_ERR(priv->bus_clk)) {
dev_err(&pdev->dev, "bus clock not found\n");
if (PTR_ERR(priv->bus_clk) != -EPROBE_DEFER)
dev_err(&pdev->dev, "bus clock not found\n");
ret = PTR_ERR(priv->bus_clk);
goto err_free;
}