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Date: Wed, 18 Apr 2007 12:08:28 +0200 (CEST) From: Jiri Slaby <jirislaby@...il.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: <linux-kernel@...r.kernel.org> Subject: [PATCH 11/11] Char: cyclades, allow DEBUG_SHIRQ cyclades, allow DEBUG_SHIRQ 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@...il.com> --- commit 71c2e9b72594f69e4e226006206ffa74b55c1642 tree 0134ea3532474f2c7bc2deabcf453b83f0747e5f parent 73621a789a0482299242ea61c971af6b5f8b828a author Jiri Slaby <jirislaby@...il.com> Wed, 18 Apr 2007 11:59:22 +0200 committer Jiri Slaby <jirislaby@...il.com> Wed, 18 Apr 2007 11:59:22 +0200 drivers/char/cyclades.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c index 5a9e7d6..5d6559e 100644 --- a/drivers/char/cyclades.c +++ b/drivers/char/cyclades.c @@ -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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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