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[PATCH] Char: isicom, check card state in isr

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Check if the card really interrupted us by reading its IO space and eventualy
return IRQ_NONE.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jiri Slaby 2007-02-10 01:44:53 -08:00 committed by Linus Torvalds
parent f0a0ba6d69
commit cb4a10ccb0
1 changed files with 5 additions and 0 deletions
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5
drivers/char/isicom.c
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@ -540,6 +540,11 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
return IRQ_NONE;
base = card->base;
/* did the card interrupt us? */
if (!(inw(base + 0x0e) & 0x02))
return IRQ_NONE;
spin_lock(&card->card_lock);
/*