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authorThomas Gleixner <tglx@linutronix.de>2020-12-10 22:25:52 +0300
committerThomas Gleixner <tglx@linutronix.de>2020-12-15 18:19:32 +0300
commit886c8121659dddb6dbfab4cdeb58d75e2d928731 (patch)
tree5975a1aef29b4176b9f8358b9f0e58396bd49a8d /drivers/mfd
parentf3925032d7fd4aa627ff10e780430269b3829f83 (diff)
downloadlinux-886c8121659dddb6dbfab4cdeb58d75e2d928731.tar.xz
mfd: ab8500-debugfs: Remove the racy fiddling with irq_desc
First of all drivers have absolutely no business to dig into the internals of an irq descriptor. That's core code and subject to change. All of this information is readily available to /proc/interrupts in a safe and race free way. Remove the inspection code which is a blatant violation of subsystem boundaries and racy against concurrent modifications of the interrupt descriptor. Print the irq line instead so the information can be looked up in a sane way in /proc/interrupts. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Lee Jones <lee.jones@linaro.org> Link: https://lore.kernel.org/r/20201210194044.157283633@linutronix.de
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/ab8500-debugfs.c16
1 files changed, 3 insertions, 13 deletions
diff --git a/drivers/mfd/ab8500-debugfs.c b/drivers/mfd/ab8500-debugfs.c
index 6d1bf7c3ca3b..a32039366a93 100644
--- a/drivers/mfd/ab8500-debugfs.c
+++ b/drivers/mfd/ab8500-debugfs.c
@@ -1513,24 +1513,14 @@ static int ab8500_interrupts_show(struct seq_file *s, void *p)
{
int line;
- seq_puts(s, "name: number: number of: wake:\n");
+ seq_puts(s, "name: number: irq: number of: wake:\n");
for (line = 0; line < num_interrupt_lines; line++) {
- struct irq_desc *desc = irq_to_desc(line + irq_first);
-
- seq_printf(s, "%3i: %6i %4i",
+ seq_printf(s, "%3i: %4i %6i %4i\n",
line,
+ line + irq_first,
num_interrupts[line],
num_wake_interrupts[line]);
-
- if (desc && desc->name)
- seq_printf(s, "-%-8s", desc->name);
- if (desc && desc->action) {
- struct irqaction *action = desc->action;
-
- seq_printf(s, " %s", action->name);
- while ((action = action->next) != NULL)
- seq_printf(s, ", %s", action->name);
}
seq_putc(s, '\n');
}