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path: root/drivers/firewire/core-card.c
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Diffstat (limited to 'drivers/firewire/core-card.c')
-rw-r--r--drivers/firewire/core-card.c20
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/firewire/core-card.c b/drivers/firewire/core-card.c
index 4c1be64fddd..543fccac81b 100644
--- a/drivers/firewire/core-card.c
+++ b/drivers/firewire/core-card.c
@@ -176,6 +176,7 @@ int fw_core_add_descriptor(struct fw_descriptor *desc)
return 0;
}
+EXPORT_SYMBOL(fw_core_add_descriptor);
void fw_core_remove_descriptor(struct fw_descriptor *desc)
{
@@ -189,6 +190,7 @@ void fw_core_remove_descriptor(struct fw_descriptor *desc)
mutex_unlock(&card_mutex);
}
+EXPORT_SYMBOL(fw_core_remove_descriptor);
static void allocate_broadcast_channel(struct fw_card *card, int generation)
{
@@ -459,11 +461,11 @@ EXPORT_SYMBOL(fw_card_add);
/*
- * The next few functions implements a dummy driver that use once a
- * card driver shuts down an fw_card. This allows the driver to
- * cleanly unload, as all IO to the card will be handled by the dummy
- * driver instead of calling into the (possibly) unloaded module. The
- * dummy driver just fails all IO.
+ * The next few functions implement a dummy driver that is used once a card
+ * driver shuts down an fw_card. This allows the driver to cleanly unload,
+ * as all IO to the card will be handled (and failed) by the dummy driver
+ * instead of calling into the module. Only functions for iso context
+ * shutdown still need to be provided by the card driver.
*/
static int dummy_enable(struct fw_card *card, u32 *config_rom, size_t length)
@@ -510,7 +512,7 @@ static int dummy_enable_phys_dma(struct fw_card *card,
return -ENODEV;
}
-static struct fw_card_driver dummy_driver = {
+static const struct fw_card_driver dummy_driver_template = {
.enable = dummy_enable,
.update_phy_reg = dummy_update_phy_reg,
.set_config_rom = dummy_set_config_rom,
@@ -529,6 +531,8 @@ void fw_card_release(struct kref *kref)
void fw_core_remove_card(struct fw_card *card)
{
+ struct fw_card_driver dummy_driver = dummy_driver_template;
+
card->driver->update_phy_reg(card, 4,
PHY_LINK_ACTIVE | PHY_CONTENDER, 0);
fw_core_initiate_bus_reset(card, 1);
@@ -537,7 +541,9 @@ void fw_core_remove_card(struct fw_card *card)
list_del_init(&card->link);
mutex_unlock(&card_mutex);
- /* Set up the dummy driver. */
+ /* Switch off most of the card driver interface. */
+ dummy_driver.free_iso_context = card->driver->free_iso_context;
+ dummy_driver.stop_iso = card->driver->stop_iso;
card->driver = &dummy_driver;
fw_destroy_nodes(card);