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Message-ID: <491FA73F.9080401@gmail.com> Date: Sun, 16 Nov 2008 05:53:19 +0100 From: Frederic Weisbecker <fweisbec@...il.com> To: Ingo Molnar <mingo@...e.hu> CC: Steven Rostedt <rostedt@...dmis.org>, Linux Kernel <linux-kernel@...r.kernel.org> Subject: [PATCH 1/4] tracing/ftrace: Fixes unexpected -EINVAL when longest tracer name is set Impact: Corrects return value from tracing_set_trace_write The following commit d9e540762f5cdd89f24e518ad1fd31142d0b9726 remade alive the bug which made the set of a new tracer returning -EINVAL if this is the longest name of tracer. This patch corrects it. Signed-off-by: Frederic Weisbecker <fweisbec@...il.com> --- kernel/trace/trace.c | 12 +++++++----- 1 files changed, 7 insertions(+), 5 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 4a90462..2d5672d 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2655,6 +2655,9 @@ tracing_set_trace_write(struct file *filp, const char __user *ubuf, char buf[max_tracer_type_len+1]; int i; size_t ret; + int err; + + ret = cnt; if (cnt > max_tracer_type_len) cnt = max_tracer_type_len; @@ -2668,12 +2671,11 @@ tracing_set_trace_write(struct file *filp, const char __user *ubuf, for (i = cnt - 1; i > 0 && isspace(buf[i]); i--) buf[i] = 0; - ret = tracing_set_tracer(buf); - if (!ret) - ret = cnt; + err = tracing_set_tracer(buf); + if (err) + return err; - if (ret > 0) - filp->f_pos += ret; + filp->f_pos += ret; return ret; } -- 1.5.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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