/* * Navman Serial USB driver * * Copyright (C) 2006 Greg Kroah-Hartman * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. * * TODO: * Add termios method that uses copy_hw but also kills all echo * flags as the navman is rx only so cannot echo. */ #include #include #include #include #include #include #include static const struct usb_device_id id_table[] = { { USB_DEVICE(0x0a99, 0x0001) }, /* Talon Technology device */ { USB_DEVICE(0x0df7, 0x0900) }, /* Mobile Action i-gotU */ { }, }; MODULE_DEVICE_TABLE(usb, id_table); static void navman_read_int_callback(struct urb *urb) { struct usb_serial_port *port = urb->context; unsigned char *data = urb->transfer_buffer; int status = urb->status; int result; switch (status) { case 0: /* success */ break; case -ECONNRESET: case -ENOENT: case -ESHUTDOWN: /* this urb is terminated, clean up */ dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", __func__, status); return; default: dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", __func__, status); goto exit; } usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); if (urb->actual_length) { tty_insert_flip_string(&port->port, data, urb->actual_length); tty_flip_buffer_push(&port->port); } exit: result = usb_submit_urb(urb, GFP_ATOMIC); if (result) dev_err(&urb->dev->dev, "%s - Error %d submitting interrupt urb\n", __func__, result); } static int navman_open(struct tty_struct *tty, struct usb_serial_port *port) { int result = 0; if (port->interrupt_in_urb) { dev_dbg(&port->dev, "%s - adding interrupt input for treo\n", __func__); result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); if (result) dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __func__, result); } return result; } static void navman_close(struct usb_serial_port *port) { usb_kill_urb(port->interrupt_in_urb); } static int navman_write(struct tty_struct *tty, struct usb_serial_port *port, const unsigned char *buf, int count) { /* * This device can't write any data, only read from the device */ return -EOPNOTSUPP; } static struct usb_serial_driver navman_device = { .driver = { .owner = THIS_MODULE, .name = "navman", }, .id_table = id_table, .num_ports = 1, .open = navman_open, .close = navman_close, .write = navman_write, .read_int_callback = navman_read_int_callback, }; static struct usb_serial_driver * const serial_drivers[] = { &navman_device, NULL }; module_usb_serial_driver(serial_drivers, id_table); MODULE_LICENSE("GPL");
path: root/sound/soc/codecs/wm8770.h
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authorDexuan Cui <decui@microsoft.com>2017-01-28 11:46:02 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-31 10:59:48 +0100
commit433e19cf33d34bb6751c874a9c00980552fe508c (patch)
treece6547ef2987fbb289fa28f03536328a42781651 /sound/soc/codecs/wm8770.h
parent191e885a2e130e639bb0c8ee350d7047294f2ce6 (diff)
Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()
Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") added the proper mb(), but removed the test "prev_write_sz < pending_sz" when making the signal decision. As a result, the guest can signal the host unnecessarily, and then the host can throttle the guest because the host thinks the guest is buggy or malicious; finally the user running stress test can perceive intermittent freeze of the guest. This patch brings back the test, and properly handles the in-place consumption APIs used by NetVSC (see get_next_pkt_raw(), put_pkt_raw() and commit_rd_index()). Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") Signed-off-by: Dexuan Cui <decui@microsoft.com> Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Tested-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/soc/codecs/wm8770.h')