/* * Controller of read/write threads for virtio-trace * * Copyright (C) 2012 Hitachi, Ltd. * Created by Yoshihiro Yunomae * Masami Hiramatsu * * Licensed under GPL version 2 only. * */ #define _GNU_SOURCE #include #include #include #include #include #include #include "trace-agent.h" #define HOST_MSG_SIZE 256 #define EVENT_WAIT_MSEC 100 static volatile sig_atomic_t global_signal_val; bool global_sig_receive; /* default false */ bool global_run_operation; /* default false*/ /* Handle SIGTERM/SIGINT/SIGQUIT to exit */ static void signal_handler(int sig) { global_signal_val = sig; } int rw_ctl_init(const char *ctl_path) { int ctl_fd; ctl_fd = open(ctl_path, O_RDONLY); if (ctl_fd == -1) { pr_err("Cannot open ctl_fd\n"); goto error; } return ctl_fd; error: exit(EXIT_FAILURE); } static int wait_order(int ctl_fd) { struct pollfd poll_fd; int ret = 0; while (!global_sig_receive) { poll_fd.fd = ctl_fd; poll_fd.events = POLLIN; ret = poll(&poll_fd, 1, EVENT_WAIT_MSEC); if (global_signal_val) { global_sig_receive = true; pr_info("Receive interrupt %d\n", global_signal_val); /* Wakes rw-threads when they are sleeping */ if (!global_run_operation) pthread_cond_broadcast(&cond_wakeup); ret = -1; break; } if (ret < 0) { pr_err("Polling error\n"); goto error; } if (ret) break; }; return ret; error: exit(EXIT_FAILURE); } /* * contol read/write threads by handling global_run_operation */ void *rw_ctl_loop(int ctl_fd) { ssize_t rlen; char buf[HOST_MSG_SIZE]; int ret; /* Setup signal handlers */ signal(SIGTERM, signal_handler); signal(SIGINT, signal_handler); signal(SIGQUIT, signal_handler); while (!global_sig_receive) { ret = wait_order(ctl_fd); if (ret < 0) break; rlen = read(ctl_fd, buf, sizeof(buf)); if (rlen < 0) { pr_err("read data error in ctl thread\n"); goto error; } if (rlen == 2 && buf[0] == '1') { /* * If host writes '1' to a control path, * this controller wakes all read/write threads. */ global_run_operation = true; pthread_cond_broadcast(&cond_wakeup); pr_debug("Wake up all read/write threads\n"); } else if (rlen == 2 && buf[0] == '0') { /* * If host writes '0' to a control path, read/write * threads will wait for notification from Host. */ global_run_operation = false; pr_debug("Stop all read/write threads\n"); } else pr_info("Invalid host notification: %s\n", buf); } return NULL; error: exit(EXIT_FAILURE); } earch'/>
path: root/include/dt-bindings/sound/cs42l42.h
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authorSriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>2017-01-09 16:00:44 +0530
committerJ. Bruce Fields <bfields@redhat.com>2017-01-12 16:14:47 -0500
commitce1ca7d2d140a1f4aaffd297ac487f246963dd2f (patch)
tree5aeab5e0cb6ef404c894a18251588278b9432a2c /include/dt-bindings/sound/cs42l42.h
parent546125d1614264d26080817d0c8cddb9b25081fa (diff)
svcrdma: avoid duplicate dma unmapping during error recovery
In rdma_read_chunk_frmr() when ib_post_send() fails, the error code path invokes ib_dma_unmap_sg() to unmap the sg list. It then invokes svc_rdma_put_frmr() which in turn tries to unmap the same sg list through ib_dma_unmap_sg() again. This second unmap is invalid and could lead to problems when the iova being unmapped is subsequently reused. Remove the call to unmap in rdma_read_chunk_frmr() and let svc_rdma_put_frmr() handle it. Fixes: 412a15c0fe53 ("svcrdma: Port to new memory registration API") Cc: stable@vger.kernel.org Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'include/dt-bindings/sound/cs42l42.h')