From 06b23f7fbbf26a025fd68395c7586949db586b47 Mon Sep 17 00:00:00 2001 From: Marc Kleine-Budde Date: Thu, 6 Aug 2015 09:48:34 +0200 Subject: [PATCH] can: pcan_usb: don't provide CAN FD bittimings by non-FD adapters The CAN FD data bittiming constants are provided via netlink only when there are valid CAN FD constants available in priv->data_bittiming_const. Due to the indirection of pointer assignments in the peak_usb driver the priv->data_bittiming_const never becomes NULL - not even for non-FD adapters. The data_bittiming_const points to zero'ed data which leads to this result when running 'ip -details link show can0': 35: can0: mtu 16 qdisc noop state DOWN mode DEFAULT group default qlen 10 link/can promiscuity 0 can state STOPPED restart-ms 0 pcan_usb: tseg1 1..16 tseg2 1..8 sjw 1..4 brp 1..64 brp-inc 1 : dtseg1 0..0 dtseg2 0..0 dsjw 1..0 dbrp 0..0 dbrp-inc 0 <== BROKEN! clock 8000000 This patch changes the struct peak_usb_adapter::bittiming_const and struct peak_usb_adapter::data_bittiming_const to pointers to fix the assignemnt problems. Cc: linux-stable # >= 4.0 Reported-by: Oliver Hartkopp Tested-by: Oliver Hartkopp Signed-off-by: Marc Kleine-Budde --- drivers/net/can/usb/peak_usb/pcan_usb.c | 24 ++--- drivers/net/can/usb/peak_usb/pcan_usb_core.c | 4 +- drivers/net/can/usb/peak_usb/pcan_usb_core.h | 4 +- drivers/net/can/usb/peak_usb/pcan_usb_fd.c | 96 +++++++++++--------- drivers/net/can/usb/peak_usb/pcan_usb_pro.c | 24 ++--- 5 files changed, 82 insertions(+), 70 deletions(-) diff --git a/drivers/net/can/usb/peak_usb/pcan_usb.c b/drivers/net/can/usb/peak_usb/pcan_usb.c index 6b94007ae052..838545ce468d 100644 --- a/drivers/net/can/usb/peak_usb/pcan_usb.c +++ b/drivers/net/can/usb/peak_usb/pcan_usb.c @@ -854,6 +854,18 @@ static int pcan_usb_probe(struct usb_interface *intf) /* * describe the PCAN-USB adapter */ +static const struct can_bittiming_const pcan_usb_const = { + .name = "pcan_usb", + .tseg1_min = 1, + .tseg1_max = 16, + .tseg2_min = 1, + .tseg2_max = 8, + .sjw_max = 4, + .brp_min = 1, + .brp_max = 64, + .brp_inc = 1, +}; + const struct peak_usb_adapter pcan_usb = { .name = "PCAN-USB", .device_id = PCAN_USB_PRODUCT_ID, @@ -862,17 +874,7 @@ const struct peak_usb_adapter pcan_usb = { .clock = { .freq = PCAN_USB_CRYSTAL_HZ / 2 , }, - .bittiming_const = { - .name = "pcan_usb", - .tseg1_min = 1, - .tseg1_max = 16, - .tseg2_min = 1, - .tseg2_max = 8, - .sjw_max = 4, - .brp_min = 1, - .brp_max = 64, - .brp_inc = 1, - }, + .bittiming_const = &pcan_usb_const, /* size of device private data */ .sizeof_dev_private = sizeof(struct pcan_usb), diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_core.c b/drivers/net/can/usb/peak_usb/pcan_usb_core.c index 7921cff93a63..5a2e341a6d1e 100644 --- a/drivers/net/can/usb/peak_usb/pcan_usb_core.c +++ b/drivers/net/can/usb/peak_usb/pcan_usb_core.c @@ -792,9 +792,9 @@ static int peak_usb_create_dev(const struct peak_usb_adapter *peak_usb_adapter, dev->ep_msg_out = peak_usb_adapter->ep_msg_out[ctrl_idx]; dev->can.clock = peak_usb_adapter->clock; - dev->can.bittiming_const = &peak_usb_adapter->bittiming_const; + dev->can.bittiming_const = peak_usb_adapter->bittiming_const; dev->can.do_set_bittiming = peak_usb_set_bittiming; - dev->can.data_bittiming_const = &peak_usb_adapter->data_bittiming_const; + dev->can.data_bittiming_const = peak_usb_adapter->data_bittiming_const; dev->can.do_set_data_bittiming = peak_usb_set_data_bittiming; dev->can.do_set_mode = peak_usb_set_mode; dev->can.do_get_berr_counter = peak_usb_adapter->do_get_berr_counter; diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_core.h b/drivers/net/can/usb/peak_usb/pcan_usb_core.h index 9e624f05ad4d..506fe506c9d3 100644 --- a/drivers/net/can/usb/peak_usb/pcan_usb_core.h +++ b/drivers/net/can/usb/peak_usb/pcan_usb_core.h @@ -48,8 +48,8 @@ struct peak_usb_adapter { u32 device_id; u32 ctrlmode_supported; struct can_clock clock; - const struct can_bittiming_const bittiming_const; - const struct can_bittiming_const data_bittiming_const; + const struct can_bittiming_const * const bittiming_const; + const struct can_bittiming_const * const data_bittiming_const; unsigned int ctrl_count; int (*intf_probe)(struct usb_interface *intf); diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_fd.c b/drivers/net/can/usb/peak_usb/pcan_usb_fd.c index 09d14e70abd7..ce44a033f63b 100644 --- a/drivers/net/can/usb/peak_usb/pcan_usb_fd.c +++ b/drivers/net/can/usb/peak_usb/pcan_usb_fd.c @@ -990,6 +990,30 @@ static void pcan_usb_fd_free(struct peak_usb_device *dev) } /* describes the PCAN-USB FD adapter */ +static const struct can_bittiming_const pcan_usb_fd_const = { + .name = "pcan_usb_fd", + .tseg1_min = 1, + .tseg1_max = 64, + .tseg2_min = 1, + .tseg2_max = 16, + .sjw_max = 16, + .brp_min = 1, + .brp_max = 1024, + .brp_inc = 1, +}; + +static const struct can_bittiming_const pcan_usb_fd_data_const = { + .name = "pcan_usb_fd", + .tseg1_min = 1, + .tseg1_max = 16, + .tseg2_min = 1, + .tseg2_max = 8, + .sjw_max = 4, + .brp_min = 1, + .brp_max = 1024, + .brp_inc = 1, +}; + const struct peak_usb_adapter pcan_usb_fd = { .name = "PCAN-USB FD", .device_id = PCAN_USBFD_PRODUCT_ID, @@ -999,28 +1023,8 @@ const struct peak_usb_adapter pcan_usb_fd = { .clock = { .freq = PCAN_UFD_CRYSTAL_HZ, }, - .bittiming_const = { - .name = "pcan_usb_fd", - .tseg1_min = 1, - .tseg1_max = 64, - .tseg2_min = 1, - .tseg2_max = 16, - .sjw_max = 16, - .brp_min = 1, - .brp_max = 1024, - .brp_inc = 1, - }, - .data_bittiming_const = { - .name = "pcan_usb_fd", - .tseg1_min = 1, - .tseg1_max = 16, - .tseg2_min = 1, - .tseg2_max = 8, - .sjw_max = 4, - .brp_min = 1, - .brp_max = 1024, - .brp_inc = 1, - }, + .bittiming_const = &pcan_usb_fd_const, + .data_bittiming_const = &pcan_usb_fd_data_const, /* size of device private data */ .sizeof_dev_private = sizeof(struct pcan_usb_fd_device), @@ -1058,6 +1062,30 @@ const struct peak_usb_adapter pcan_usb_fd = { }; /* describes the PCAN-USB Pro FD adapter */ +static const struct can_bittiming_const pcan_usb_pro_fd_const = { + .name = "pcan_usb_pro_fd", + .tseg1_min = 1, + .tseg1_max = 64, + .tseg2_min = 1, + .tseg2_max = 16, + .sjw_max = 16, + .brp_min = 1, + .brp_max = 1024, + .brp_inc = 1, +}; + +static const struct can_bittiming_const pcan_usb_pro_fd_data_const = { + .name = "pcan_usb_pro_fd", + .tseg1_min = 1, + .tseg1_max = 16, + .tseg2_min = 1, + .tseg2_max = 8, + .sjw_max = 4, + .brp_min = 1, + .brp_max = 1024, + .brp_inc = 1, +}; + const struct peak_usb_adapter pcan_usb_pro_fd = { .name = "PCAN-USB Pro FD", .device_id = PCAN_USBPROFD_PRODUCT_ID, @@ -1067,28 +1095,8 @@ const struct peak_usb_adapter pcan_usb_pro_fd = { .clock = { .freq = PCAN_UFD_CRYSTAL_HZ, }, - .bittiming_const = { - .name = "pcan_usb_pro_fd", - .tseg1_min = 1, - .tseg1_max = 64, - .tseg2_min = 1, - .tseg2_max = 16, - .sjw_max = 16, - .brp_min = 1, - .brp_max = 1024, - .brp_inc = 1, - }, - .data_bittiming_const = { - .name = "pcan_usb_pro_fd", - .tseg1_min = 1, - .tseg1_max = 16, - .tseg2_min = 1, - .tseg2_max = 8, - .sjw_max = 4, - .brp_min = 1, - .brp_max = 1024, - .brp_inc = 1, - }, + .bittiming_const = &pcan_usb_pro_fd_const, + .data_bittiming_const = &pcan_usb_pro_fd_data_const, /* size of device private data */ .sizeof_dev_private = sizeof(struct pcan_usb_fd_device), diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c index 7d61b3279798..bbdd6058cd2f 100644 --- a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c +++ b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c @@ -1004,6 +1004,18 @@ int pcan_usb_pro_probe(struct usb_interface *intf) /* * describe the PCAN-USB Pro adapter */ +static const struct can_bittiming_const pcan_usb_pro_const = { + .name = "pcan_usb_pro", + .tseg1_min = 1, + .tseg1_max = 16, + .tseg2_min = 1, + .tseg2_max = 8, + .sjw_max = 4, + .brp_min = 1, + .brp_max = 1024, + .brp_inc = 1, +}; + const struct peak_usb_adapter pcan_usb_pro = { .name = "PCAN-USB Pro", .device_id = PCAN_USBPRO_PRODUCT_ID, @@ -1012,17 +1024,7 @@ const struct peak_usb_adapter pcan_usb_pro = { .clock = { .freq = PCAN_USBPRO_CRYSTAL_HZ, }, - .bittiming_const = { - .name = "pcan_usb_pro", - .tseg1_min = 1, - .tseg1_max = 16, - .tseg2_min = 1, - .tseg2_max = 8, - .sjw_max = 4, - .brp_min = 1, - .brp_max = 1024, - .brp_inc = 1, - }, + .bittiming_const = &pcan_usb_pro_const, /* size of device private data */ .sizeof_dev_private = sizeof(struct pcan_usb_pro_device),