/* * video_device_test - Video Device Test * * Copyright (c) 2016 Shuah Khan * Copyright (c) 2016 Samsung Electronics Co., Ltd. * * This file is released under the GPLv2. */ /* * This file adds a test for Video Device. This test should not be included * in the Kselftest run. This test should be run when hardware and driver * that makes use of V4L2 API is present. * * This test opens user specified Video Device and calls video ioctls in a * loop once every 10 seconds. * * Usage: * sudo ./video_device_test -d /dev/videoX * * While test is running, remove the device or unbind the driver and * ensure there are no use after free errors and other Oops in the * dmesg. * When possible, enable KaSan kernel config option for use-after-free * error detection. */ #include #include #include #include #include #include #include #include #include #include int main(int argc, char **argv) { int opt; char video_dev[256]; int count; struct v4l2_tuner vtuner; struct v4l2_capability vcap; int ret; int fd; if (argc < 2) { printf("Usage: %s [-d ]\n", argv[0]); exit(-1); } /* Process arguments */ while ((opt = getopt(argc, argv, "d:")) != -1) { switch (opt) { case 'd': strncpy(video_dev, optarg, sizeof(video_dev) - 1); video_dev[sizeof(video_dev)-1] = '\0'; break; default: printf("Usage: %s [-d ]\n", argv[0]); exit(-1); } } /* Generate random number of interations */ srand((unsigned int) time(NULL)); count = rand(); /* Open Video device and keep it open */ fd = open(video_dev, O_RDWR); if (fd == -1) { printf("Video Device open errno %s\n", strerror(errno)); exit(-1); } printf("\nNote:\n" "While test is running, remove the device or unbind\n" "driver and ensure there are no use after free errors\n" "and other Oops in the dmesg. When possible, enable KaSan\n" "kernel config option for use-after-free error detection.\n\n"); while (count > 0) { ret = ioctl(fd, VIDIOC_QUERYCAP, &vcap); if (ret < 0) printf("VIDIOC_QUERYCAP errno %s\n", strerror(errno)); else printf("Video device driver %s\n", vcap.driver); ret = ioctl(fd, VIDIOC_G_TUNER, &vtuner); if (ret < 0) printf("VIDIOC_G_TUNER, errno %s\n", strerror(errno)); else printf("type %d rangelow %d rangehigh %d\n", vtuner.type, vtuner.rangelow, vtuner.rangehigh); sleep(10); count--; } } value='author'>author
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authorJurij Smakov <jurij@wooyd.org>2017-01-30 15:41:36 -0600
committerKalle Valo <kvalo@codeaurora.org>2017-01-31 09:05:25 +0200
commit52f5631a4c056ad01682393be56d2be237e81610 (patch)
tree53d1ddd2c1b179c808df10b6ce731ad26aa9f31b /drivers/usb/host/ohci-sm501.c
parent2b1d530cb3157f828fcaadd259613f59db3c6d1c (diff)
rtlwifi: rtl8192ce: Fix loading of incorrect firmware
In commit cf4747d7535a ("rtlwifi: Fix regression caused by commit d86e64768859, an error in the edit results in the wrong firmware being loaded for some models of the RTL8188/8192CE. In this condition, the connection suffered from high ping latency, slow transfer rates, and required higher signal strengths to work at all See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=853073, https://bugzilla.opensuse.org/show_bug.cgi?id=1017471, and https://github.com/lwfinger/rtlwifi_new/issues/203 for descriptions of the problems. This patch fixes all of those problems. Fixes: cf4747d7535a ("rtlwifi: Fix regression caused by commit d86e64768859") Signed-off-by: Jurij Smakov <jurij@wooyd.org> Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Cc: Stable <stable@vger.kernel.org> # 4.9+ Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/usb/host/ohci-sm501.c')