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https://github.com/torvalds/linux
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68581e9350
At the moment if request_event_sources_irqs() can't allocate or request the interrupt, it just does a KERN_ERR printk. This may be fine for the existing RAS code where if we miss an EPOW event it just means that the event won't be logged and if we miss one of the RAS errors then we could miss an event that we perhaps should take action on. But, for the upcoming IO events code that will use event-sources if we can't allocate or request the interrupt it means we'd potentially miss an interrupt from the device. So, let's add a WARN_ON() in this error case so that we're a bit more vocal when something's amiss. While we're at it, also use pr_err() to neaten the code up a bit. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/*
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* Copyright (C) 2001 Dave Engebretsen IBM Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <asm/prom.h>
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#include "pseries.h"
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void request_event_sources_irqs(struct device_node *np,
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irq_handler_t handler,
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const char *name)
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{
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int i, index, count = 0;
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struct of_irq oirq;
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const u32 *opicprop;
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unsigned int opicplen;
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unsigned int virqs[16];
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/* Check for obsolete "open-pic-interrupt" property. If present, then
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* map those interrupts using the default interrupt host and default
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* trigger
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*/
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opicprop = of_get_property(np, "open-pic-interrupt", &opicplen);
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if (opicprop) {
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opicplen /= sizeof(u32);
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for (i = 0; i < opicplen; i++) {
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if (count > 15)
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break;
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virqs[count] = irq_create_mapping(NULL, *(opicprop++));
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if (virqs[count] == NO_IRQ) {
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pr_err("event-sources: Unable to allocate "
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"interrupt number for %s\n",
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np->full_name);
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WARN_ON(1);
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}
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else
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count++;
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}
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}
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/* Else use normal interrupt tree parsing */
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else {
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/* First try to do a proper OF tree parsing */
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for (index = 0; of_irq_map_one(np, index, &oirq) == 0;
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index++) {
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if (count > 15)
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break;
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virqs[count] = irq_create_of_mapping(oirq.controller,
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oirq.specifier,
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oirq.size);
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if (virqs[count] == NO_IRQ) {
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pr_err("event-sources: Unable to allocate "
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"interrupt number for %s\n",
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np->full_name);
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WARN_ON(1);
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}
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else
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count++;
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}
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}
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/* Now request them */
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for (i = 0; i < count; i++) {
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if (request_irq(virqs[i], handler, 0, name, NULL)) {
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pr_err("event-sources: Unable to request interrupt "
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"%d for %s\n", virqs[i], np->full_name);
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WARN_ON(1);
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return;
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}
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}
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}
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