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at86rf230: detailed edge triggered irq warning 

This patch introduce a more detailed information why edge triggered
irq's are currently not recommended. It could be that rising/falling
edge detection can happen while the irq is disabled.

Suggested-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Alexander Aring 2015-08-27 21:49:20 +02:00 committed by Marcel Holtmann
parent 493bc90a96
commit 5c3c473637
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ieee802154/at86rf230.c
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@ -1376,7 +1376,7 @@ static int at86rf230_hw_init(struct at86rf230_local *lp, u8 xtal_trim)
if (irq_type == IRQ_TYPE_EDGE_RISING ||
irq_type == IRQ_TYPE_EDGE_FALLING)
dev_warn(&lp->spi->dev,
"Using edge triggered irq's are not recommended!\n");
"Using edge triggered irq's are not recommended, because it can cause races and result in a non-functional driver!\n");
if (irq_type == IRQ_TYPE_EDGE_FALLING ||
irq_type == IRQ_TYPE_LEVEL_LOW)
irq_pol = IRQ_ACTIVE_LOW;