From: Dominik Brodowski Date: Thu, 28 Jul 2005 08:07:27 +0000 (-0700) Subject: [PATCH] pcmcia: fix sharing IRQs and request_irq without IRQ_HANDLE_PRESENT X-Git-Tag: v2.6.13-rc4~14 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a1b274fbe3f00469fb8a68806469ec7746c7f648;p=pandora-kernel.git [PATCH] pcmcia: fix sharing IRQs and request_irq without IRQ_HANDLE_PRESENT Debugging and description from: Noah Misch When a driver calls pcmcia_request_irq with IRQ_HANDLE_PRESENT unset, it looks for an open IRQ by request_irq()ing with a dummy handler and NULL dev_info. free_irq uses dev_info as a key for identifying the handler to free among those sharing an IRQ, so request_irq returns -EINVAL if dev_info is NULL and the IRQ may be shared. That unknown error code is the -EINVAL. It looks like only pcnet_cs and axnet_cs are affected. Most other drivers let pcmcia_request_irq install their interrupt handlers. sym53c500_cs requests its IRQ manually, but it cannot share an IRQ. The appended patch changes pcmcia_request_irq to pass an arbitrary, unique, non-NULL dev_info with the dummy handler. Signed-off-by: Dominik Brodowski Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Reading git-diff-tree failed