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Char: cyclades, allow DEBUG_SHIRQ

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Test if base addr is non-null in ISR to prove the card has been correctly
initialized.  This is needed for DEBUG_SHIRQ for example.

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 2007-05-08 00:36:24 -07:00 committed by Linus Torvalds
parent 85c93fa95b
commit f1e83c6c1e
1 changed files with 4 additions and 0 deletions
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4
drivers/char/cyclades.c
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@ -1444,6 +1444,10 @@ static irqreturn_t cyy_interrupt(int irq, void *dev_id)
card_base_addr = cinfo->base_addr;
index = cinfo->bus_index;
/* card was not initialized yet (e.g. DEBUG_SHIRQ) */
if (unlikely(card_base_addr == NULL))
return IRQ_HANDLED;
/* This loop checks all chips in the card. Make a note whenever
_any_ chip had some work to do, as this is considered an
indication that there will be more to do. Only when no chip