tracing/histograms: Return an error if we fail to add histogram to hist_vars list

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commit 4b8b390516 upstream.

Commit 6018b585e8 ("tracing/histograms: Add histograms to hist_vars if
they have referenced variables") added a check to fail histogram creation
if save_hist_vars() failed to add histogram to hist_vars list. But the
commit failed to set ret to failed return code before jumping to
unregister histogram, fix it.

Link: https://lore.kernel.org/linux-trace-kernel/20230714203341.51396-1-mkhalfella@purestorage.com

Cc: stable@vger.kernel.org
Fixes: 6018b585e8 ("tracing/histograms: Add histograms to hist_vars if they have referenced variables")
Signed-off-by: Mohamed Khalfella <mkhalfella@purestorage.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Mohamed Khalfella 2023-07-14 20:33:41 +00:00 • committed by Greg Kroah-Hartman

parent 801d026d61

commit 5339e36dff

1 changed files with 2 additions and 1 deletions

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kernel/trace/trace_events_hist.c

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