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parisc: eisa: Fix infinite loop when parsing invalid IRQ value

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When an invalid value is passed via the "eisa_irq_edge=" kernel
command line parameter (e.g. "eisa_irq_edge=16,5"), eisa_irq_setup()
prints an error message and continues without advancing the current
position.  As a result the same invalid value is parsed again and
again, causing an infinite loop while the kernel boots.

Advance to the next comma-separated entry, or stop parsing when there
is no next entry, before continuing so that the remaining entries are
processed normally.

Signed-off-by: Pei Xiao <xiaopei01@kylinos.cn>
Cc: stable@vger.kernel.org
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Pei Xiao 2026-08-17 11:29:25 +08:00 committed by Helge Deller
parent 04cf68c9a7
commit 8b585431a1
1 changed files with 5 additions and 0 deletions
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5
drivers/parisc/eisa.c
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@ -442,6 +442,11 @@ static int __init eisa_irq_setup(char *str)
val = (int) simple_strtoul(cur, &pe, 0);
if (val > 15 || val < 0) {
printk(KERN_ERR "eisa: EISA irq value are 0-15\n");
cur = strchr(cur, ',');
if (cur)
cur++;
else
break;
continue;
}
if (val == 2) {