/* * The USB Monitor, inspired by Dave Harding's USBMon. * * This is the 's' or 'stat' reader which debugs usbmon itself. * Note that this code blows through locks, so make sure that * /dbg/usbmon/0s is well protected from non-root users. * */ #include #include #include #include #include #include #include "usb_mon.h" #define STAT_BUF_SIZE 80 struct snap { int slen; char str[STAT_BUF_SIZE]; }; static int mon_stat_open(struct inode *inode, struct file *file) { struct mon_bus *mbus; struct snap *sp; sp = kmalloc(sizeof(struct snap), GFP_KERNEL); if (sp == NULL) return -ENOMEM; mbus = inode->i_private; sp->slen = snprintf(sp->str, STAT_BUF_SIZE, "nreaders %d events %u text_lost %u\n", mbus->nreaders, mbus->cnt_events, mbus->cnt_text_lost); file->private_data = sp; return 0; } static ssize_t mon_stat_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) { struct snap *sp = file->private_data; return simple_read_from_buffer(buf, nbytes, ppos, sp->str, sp->slen); } static int mon_stat_release(struct inode *inode, struct file *file) { struct snap *sp = file->private_data; file->private_data = NULL; kfree(sp); return 0; } const struct file_operations mon_fops_stat = { .owner = THIS_MODULE, .open = mon_stat_open, .llseek = no_llseek, .read = mon_stat_read, /* .write = mon_stat_write, */ /* .poll = mon_stat_poll, */ /* .unlocked_ioctl = mon_stat_ioctl, */ .release = mon_stat_release, }; a>refslogtreecommitdiff
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authorStanislaw Gruszka <sgruszka@redhat.com>2017-01-29 12:40:52 +0100
committerKalle Valo <kvalo@codeaurora.org>2017-01-31 09:08:52 +0200
commit33e962c8871f015f5c8978384553dddcf5b81b22 (patch)
tree43aff96c2ee21d9e0fa2018457778a4de52053cd /sound/core/oss/pcm_plugin.h
parent575ddce0507789bf9830d089557d2199d2f91865 (diff)
rt2x00: fix clk_get call
clk_get() takes two arguments and might return ERR_PTR(), so we have to nullify pointer on that case, to do not break further call to clk_get_rate(). Reported-by: Felix Fietkau <nbd@nbd.name> Fixes: 34db70b92fae ("rt2x00: add copy of clk for soc devices") Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'sound/core/oss/pcm_plugin.h')