Merge tag 'linux-can-fixes-for-6.11-20240912' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can

Marc Kleine-Budde says:

====================
pull-request: can 2024-09-12

Kuniyuki Iwashima's patch fixes an incomplete bug fix in the CAN BCM
protocol, which was introduced during v6.11.

A patch by Stefan Mätje removes the unsupported CAN_CTRLMODE_3_SAMPLES
mode for CAN-USB/3-FD devices in the esd_usb driver.

The next patch is by Martin Jocic and enables 64-bit DMA addressing
for the kvaser_pciefd driver.

The last two patches both affect the m_can driver. Jake Hamby's patch
activates NAPI before interrupts are activated, a patch by me moves
the stopping of the clock after the device has been shut down.

* tag 'linux-can-fixes-for-6.11-20240912' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can:
  can: m_can: m_can_close(): stop clocks after device has been shut down
  can: m_can: enable NAPI before enabling interrupts
  can: kvaser_pciefd: Enable 64-bit DMA addressing
  can: esd_usb: Remove CAN_CTRLMODE_3_SAMPLES for CAN-USB/3-FD
  can: bcm: Clear bo->bcm_proc_read after remove_proc_entry().
====================

Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: kuba-moo

drivers/net/can/kvaser_pciefd.c

@@ -1104,6 +1104,9 @@ static int kvaser_pciefd_setup_dma(struct kvaser_pciefd *pcie)
 
 	/* Disable the DMA */
 	iowrite32(0, KVASER_PCIEFD_SRB_ADDR(pcie) + KVASER_PCIEFD_SRB_CTRL_REG);
+
+	dma_set_mask_and_coherent(&pcie->pci->dev, DMA_BIT_MASK(64));
+
 	for (i = 0; i < KVASER_PCIEFD_DMA_COUNT; i++) {
 		pcie->dma_data[i] = dmam_alloc_coherent(&pcie->pci->dev,
 							KVASER_PCIEFD_DMA_SIZE,

drivers/net/can/m_can/m_can.c

@@ -1763,11 +1763,7 @@ static int m_can_close(struct net_device *dev)
 
 	netif_stop_queue(dev);
 
-	if (!cdev->is_peripheral)
-		napi_disable(&cdev->napi);
-
 	m_can_stop(dev);
-	m_can_clk_stop(cdev);
 	free_irq(dev->irq, dev);
 
 	m_can_clean(dev);
@@ -1776,10 +1772,13 @@ static int m_can_close(struct net_device *dev)
 		destroy_workqueue(cdev->tx_wq);
 		cdev->tx_wq = NULL;
 		can_rx_offload_disable(&cdev->offload);
+	} else {
+		napi_disable(&cdev->napi);
 	}
 
 	close_candev(dev);
 
+	m_can_clk_stop(cdev);
 	phy_power_off(cdev->transceiver);
 
 	return 0;
@@ -2030,6 +2029,8 @@ static int m_can_open(struct net_device *dev)
 
 	if (cdev->is_peripheral)
 		can_rx_offload_enable(&cdev->offload);
+	else
+		napi_enable(&cdev->napi);
 
 	/* register interrupt handler */
 	if (cdev->is_peripheral) {
@@ -2063,9 +2064,6 @@ static int m_can_open(struct net_device *dev)
 	if (err)
 		goto exit_start_fail;
 
-	if (!cdev->is_peripheral)
-		napi_enable(&cdev->napi);
-
 	netif_start_queue(dev);
 
 	return 0;
@@ -2079,6 +2077,8 @@ static int m_can_open(struct net_device *dev)
 out_wq_fail:
 	if (cdev->is_peripheral)
 		can_rx_offload_disable(&cdev->offload);
+	else
+		napi_disable(&cdev->napi);
 	close_candev(dev);
 exit_disable_clks:
 	m_can_clk_stop(cdev);

drivers/net/can/usb/esd_usb.c

@@ -3,7 +3,7 @@
  * CAN driver for esd electronics gmbh CAN-USB/2, CAN-USB/3 and CAN-USB/Micro
  *
  * Copyright (C) 2010-2012 esd electronic system design gmbh, Matthias Fuchs <[email protected]>
- * Copyright (C) 2022-2023 esd electronics gmbh, Frank Jungclaus <[email protected]>
+ * Copyright (C) 2022-2024 esd electronics gmbh, Frank Jungclaus <[email protected]>
  */
 
 #include <linux/can.h>
@@ -1116,9 +1116,6 @@ static int esd_usb_3_set_bittiming(struct net_device *netdev)
 	if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
 		flags |= ESD_USB_3_BAUDRATE_FLAG_LOM;
 
-	if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
-		flags |= ESD_USB_3_BAUDRATE_FLAG_TRS;
-
 	baud_x->nom.brp = cpu_to_le16(nom_bt->brp & (nom_btc->brp_max - 1));
 	baud_x->nom.sjw = cpu_to_le16(nom_bt->sjw & (nom_btc->sjw_max - 1));
 	baud_x->nom.tseg1 = cpu_to_le16((nom_bt->prop_seg + nom_bt->phase_seg1)
@@ -1219,7 +1216,6 @@ static int esd_usb_probe_one_net(struct usb_interface *intf, int index)
 	switch (le16_to_cpu(dev->udev->descriptor.idProduct)) {
 	case ESD_USB_CANUSB3_PRODUCT_ID:
 		priv->can.clock.freq = ESD_USB_3_CAN_CLOCK;
-		priv->can.ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES;
 		priv->can.ctrlmode_supported |= CAN_CTRLMODE_FD;
 		priv->can.bittiming_const = &esd_usb_3_nom_bittiming_const;
 		priv->can.data_bittiming_const = &esd_usb_3_data_bittiming_const;

net/can/bcm.c

@@ -1471,8 +1471,10 @@ static void bcm_notify(struct bcm_sock *bo, unsigned long msg,
 		/* remove device reference, if this is our bound device */
 		if (bo->bound && bo->ifindex == dev->ifindex) {
 #if IS_ENABLED(CONFIG_PROC_FS)
-			if (sock_net(sk)->can.bcmproc_dir && bo->bcm_proc_read)
+			if (sock_net(sk)->can.bcmproc_dir && bo->bcm_proc_read) {
 				remove_proc_entry(bo->procname, sock_net(sk)->can.bcmproc_dir);
+				bo->bcm_proc_read = NULL;
+			}
 #endif
 			bo->bound   = 0;
 			bo->ifindex = 0;