[PATCH] pcmcia/pcmcia_resource.c: fix crash when using Cardbus cards
using the old ioctl interface together with cardbus card gives a NULL
pointer dereference since cardbus devices don't have a struct pcmcia_device.
also s->io[0].res can be NULL as well.
fix is to move the pcmcia code after the cardbus code and to check for a null
pointer.
Signed-off-by: Daniel Ritz <[email protected]>
diff --git a/drivers/pcmcia/pcmcia_resource.c b/drivers/pcmcia/pcmcia_resource.c
index 45063b4..6572f07 100644
--- a/drivers/pcmcia/pcmcia_resource.c
+++ b/drivers/pcmcia/pcmcia_resource.c
@@ -209,7 +209,6 @@ int pccard_get_configuration_info(struct
if (!(s->state & SOCKET_PRESENT))
return CS_NO_CARD;
- config->Function = p_dev->func;
#ifdef CONFIG_CARDBUS
if (s->state & SOCKET_CARDBUS) {
@@ -223,14 +222,22 @@ #ifdef CONFIG_CARDBUS
config->AssignedIRQ = s->irq.AssignedIRQ;
if (config->AssignedIRQ)
config->Attributes |= CONF_ENABLE_IRQ;
- config->BasePort1 = s->io[0].res->start;
- config->NumPorts1 = s->io[0].res->end - config->BasePort1 + 1;
+ if (s->io[0].res) {
+ config->BasePort1 = s->io[0].res->start;
+ config->NumPorts1 = s->io[0].res->end - config->BasePort1 + 1;
+ }
}
return CS_SUCCESS;
}
#endif
- c = (p_dev) ? p_dev->function_config : NULL;
+ if (p_dev) {
+ c = p_dev->function_config;
+ config->Function = p_dev->func;
+ } else {
+ c = NULL;
+ config->Function = 0;
+ }
if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
config->Attributes = 0;
-
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