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staging: clocking-wizard: Handle invalid clk in notifier

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Even though it should never happen, handle the case that the clock
notifier is called with an unexpected clock handle. This avoids the
compiler warning:
   drivers/staging/clocking-wizard/clk-xlnx-clock-wizard.c: In function 'clk_wzrd_clk_notifier':
>> drivers/staging/clocking-wizard/clk-xlnx-clock-wizard.c:99:6: warning: 'max' may be used uninitialized in this function [-Wmaybe-uninitialized]
      if (ndata->new_rate > max)
         ^

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Soren Brinkmann 2015-01-05 09:21:29 -08:00 committed by Greg Kroah-Hartman
parent b6461b53e7
commit 19f15a3000
1 changed files with 3 additions and 1 deletions
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4
drivers/staging/clocking-wizard/clk-xlnx-clock-wizard.c
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@ -91,8 +91,10 @@ static int clk_wzrd_clk_notifier(struct notifier_block *nb, unsigned long event,
if (ndata->clk == clk_wzrd->clk_in1)
max = clk_wzrd_max_freq[clk_wzrd->speed_grade - 1];
if (ndata->clk == clk_wzrd->axi_clk)
else if (ndata->clk == clk_wzrd->axi_clk)
max = WZRD_ACLK_MAX_FREQ;
else
return NOTIFY_DONE; /* should never happen */
switch (event) {
case PRE_RATE_CHANGE: