diff options
| author | Stanislaw Gruszka <sgruszka@redhat.com> | 2011-01-10 12:56:05 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-02-17 15:37:09 -0800 |
| commit | 04c7ff0534cb383ecb266f0779face9bea9f828d (patch) | |
| tree | 50d28fe99b401d1a667653e15a508b15953d950e | |
| parent | b5dc8db4a135a1f4505558e492621380f4adb8e8 (diff) | |
hostap_cs: fix sleeping function called from invalid context
commit 4e5518ca53be29c1ec3c00089c97bef36bfed515 upstream.
pcmcia_request_irq() and pcmcia_enable_device() are intended
to be called from process context (first function allocate memory
with GFP_KERNEL, second take a mutex). We can not take spin lock
and call them.
It's safe to move spin lock after pcmcia_enable_device() as we
still hold off IRQ until dev->base_addr is 0 and driver will
not proceed with interrupts when is not ready.
Patch resolves:
https://bugzilla.redhat.com/show_bug.cgi?id=643758
Reported-and-tested-by: rbugz@biobind.com
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/net/wireless/hostap/hostap_cs.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/drivers/net/wireless/hostap/hostap_cs.c b/drivers/net/wireless/hostap/hostap_cs.c index b4ff1dc1d72..6992f8ff229 100644 --- a/drivers/net/wireless/hostap/hostap_cs.c +++ b/drivers/net/wireless/hostap/hostap_cs.c @@ -662,12 +662,6 @@ static int prism2_config(struct pcmcia_device *link) link->dev_node = &hw_priv->node; /* - * Make sure the IRQ handler cannot proceed until at least - * dev->base_addr is initialized. - */ - spin_lock_irqsave(&local->irq_init_lock, flags); - - /* * Allocate an interrupt line. Note that this does not assign a * handler to the interrupt, unless the 'Handler' member of the * irq structure is initialized. @@ -690,9 +684,10 @@ static int prism2_config(struct pcmcia_device *link) CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf)); + /* IRQ handler cannot proceed until at dev->base_addr is initialized */ + spin_lock_irqsave(&local->irq_init_lock, flags); dev->irq = link->irq.AssignedIRQ; dev->base_addr = link->io.BasePort1; - spin_unlock_irqrestore(&local->irq_init_lock, flags); /* Finally, report what we've done */ @@ -724,7 +719,6 @@ static int prism2_config(struct pcmcia_device *link) return ret; cs_failed: - spin_unlock_irqrestore(&local->irq_init_lock, flags); cs_error(link, last_fn, last_ret); failed: |