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ARM: hw_breakpoint: kill WARN_ONCE usage

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WARN_ONCE is a bit OTT for some of the simple failure cases encountered
in hw_breakpoint, so use either pr_warning or pr_warn_once instead.

Reported-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Will Deacon 2012-10-25 17:18:23 +01:00
parent 9e962f7660
commit f435ab7992
1 changed files with 10 additions and 5 deletions
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15
arch/arm/kernel/hw_breakpoint.c
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@ -261,10 +261,11 @@ static int enable_monitor_mode(void)
/* Check that the write made it through. */
ARM_DBG_READ(c0, c1, 0, dscr);
if (WARN_ONCE(!(dscr & ARM_DSCR_MDBGEN),
"Failed to enable monitor mode on CPU %d.\n",
smp_processor_id()))
if (!(dscr & ARM_DSCR_MDBGEN)) {
pr_warn_once("Failed to enable monitor mode on CPU %d.\n",
smp_processor_id());
return -EPERM;
}
out:
return 0;
@ -357,8 +358,10 @@ int arch_install_hw_breakpoint(struct perf_event *bp)
}
}
if (WARN_ONCE(i == max_slots, "Can't find any breakpoint slot\n"))
if (i == max_slots) {
pr_warning("Can't find any breakpoint slot\n");
return -EBUSY;
}
/* Override the breakpoint data with the step data. */
if (info->step_ctrl.enabled) {
@ -407,8 +410,10 @@ void arch_uninstall_hw_breakpoint(struct perf_event *bp)
}
}
if (WARN_ONCE(i == max_slots, "Can't find any breakpoint slot\n"))
if (i == max_slots) {
pr_warning("Can't find any breakpoint slot\n");
return;
}
/* Ensure that we disable the mismatch breakpoint. */
if (info->ctrl.type != ARM_BREAKPOINT_EXECUTE &&