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MLK-15300-1 perf: fixed crash when irq have not assigned in dts file 

[ 28.061044] perf[2494]: PC Alignment exception: pc=0000000072656d69 sp=ffff800032f2bd30
[ 28.069061] Internal error: Oops - SP/PC alignment exception: 8a000000 1 PREEMPT SMP
[ 28.077066] Modules linked in:
[ 28.080128] CPU: 2 PID: 2494 Comm: perf Not tainted 4.9.11-02540-g3ebe22c #52
[ 28.087263] Hardware name: Freescale i.MX8QXP LPDDR4 ARM2 (DT)
[ 28.093093] task: ffff80002e097080 task.stack: ffff800032f28000
[ 28.099011] PC is at 0x72656d69
[ 28.102163] LR is at perf_try_init_event+0x98/0xb0
[ 28.106950] pc : [<0000000072656d69>] lr : [<ffff0000081594e0>] pstate: 60000145

Signed-off-by: Frank Li <Frank.Li@nxp.com>
pull/10/head
Frank Li 2017-06-28 11:36:57 -05:00 committed by Jason Liu
parent a5c8f7c10f
commit bc15f4960b
1 changed files with 3 additions and 1 deletions
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4
drivers/perf/ddr-perf.c
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@ -449,11 +449,13 @@ static int ddr_perf_probe(struct platform_device *pdev)
pmu);
if (ret < 0) {
pr_err("Request irq failed: %d", ret);
goto ddr_perf_err;
goto ddr_perf_irq_err;
}
return 0;
ddr_perf_irq_err:
perf_pmu_unregister(&(pmu->pmu));
ddr_perf_err:
pr_warn("i.MX8 DDR Perf PMU failed (%d), disabled\n", ret);
kfree(pmu);