diff options
| author |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-21 11:37:57 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-21 11:37:57 -0800 |
| commit | ad2e6329666650d9cafcae9ef53fbe09ea759ae2 (patch) | |
| tree | b23eb258fa609be246bb44cd9b33ff86d8142ca7 /kernel/trace/trace.c | |
| parent | USB: io_ti: Fix NULL dereference in chase_port() (diff) | |
| parent | usb: gadget: FunctionFS: Fix missing braces in parse_opts (diff) | |
| download | wireguard-linux-ad2e6329666650d9cafcae9ef53fbe09ea759ae2.tar.xz wireguard-linux-ad2e6329666650d9cafcae9ef53fbe09ea759ae2.zip | |
Merge tag 'fixes-for-v3.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus
Felipe writes:
usb: fixes for v3.8-rc5
Finally we have a build fix for fsl-mxc-udc UDC driver.
We also have a fix for ep0 maxburst setting on DWC3
which could confuse the HW if we tell it we had way
too many streams on that endpoint when it _has_ to be
only one.
cppi_dma support for MUSB got a fix when running as a
module. By dropping the wrong __init annotation, the
function will be available even when we're modules and
we're done with .init.text section.
Last, but not least, we have a fix on FunctionFS which
was causing a bug on our option parsing algorithm.
Diffstat (limited to 'kernel/trace/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index e5125677efa0..3c13e46d7d24 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2899,6 +2899,8 @@ tracing_trace_options_write(struct file *filp, const char __user *ubuf, if (copy_from_user(&buf, ubuf, cnt)) return -EFAULT; + buf[cnt] = 0; + trace_set_options(buf); *ppos += cnt; @@ -3452,7 +3454,7 @@ static int tracing_wait_pipe(struct file *filp) return -EINTR; /* - * We block until we read something and tracing is enabled. + * We block until we read something and tracing is disabled. * We still block if tracing is disabled, but we have never * read anything. This allows a user to cat this file, and * then enable tracing. But after we have read something, @@ -3460,7 +3462,7 @@ static int tracing_wait_pipe(struct file *filp) * * iter->pos will be 0 if we haven't read anything. */ - if (tracing_is_enabled() && iter->pos) + if (!tracing_is_enabled() && iter->pos) break; } @@ -4815,10 +4817,17 @@ rb_simple_write(struct file *filp, const char __user *ubuf, return ret; if (buffer) { - if (val) + mutex_lock(&trace_types_lock); + if (val) { ring_buffer_record_on(buffer); - else + if (current_trace->start) + current_trace->start(tr); + } else { ring_buffer_record_off(buffer); + if (current_trace->stop) + current_trace->stop(tr); + } + mutex_unlock(&trace_types_lock); } (*ppos)++; |