| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.18 151/151] x86: pmc-atom: Assign debugfs node as soon as possible | Date | Tue, 3 Mar 2015 22:14:45 -0800 |
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3.18-stable review patch. If anyone has any objections, please let me know.
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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
commit 1b43d7125f3b6f7d46e72da64f65f3187a83b66b upstream.
pmc_dbgfs_unregister() will be called when pmc->dbgfs_dir is unconditionally NULL on error path in pmc_dbgfs_register(). To prevent this we move the assignment to where is should be.
Fixes: f855911c1f48 (x86/pmc_atom: Expose PMC device state and platform sleep state) Reported-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Aubrey Li <aubrey.li@linux.intel.com> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Kumar P. Mahesh <mahesh.kumar.p@intel.com> Link: http://lkml.kernel.org/r/1421253575-22509-2-git-send-email-andriy.shevchenko@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- arch/x86/kernel/pmc_atom.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/arch/x86/kernel/pmc_atom.c +++ b/arch/x86/kernel/pmc_atom.c @@ -217,6 +217,8 @@ static int pmc_dbgfs_register(struct pmc if (!dir) return -ENOMEM; + pmc->dbgfs_dir = dir; + f = debugfs_create_file("dev_state", S_IFREG | S_IRUGO, dir, pmc, &pmc_dev_state_ops); if (!f) { @@ -229,7 +231,7 @@ static int pmc_dbgfs_register(struct pmc dev_err(&pdev->dev, "sleep_state register failed\n"); goto err; } - pmc->dbgfs_dir = dir; + return 0; err: pmc_dbgfs_unregister(pmc);
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