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Staging: ipack/bridges/tpci200: Store the irq holder in slot_irq.

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This way we do no longer need to keep a dangling pointer to struct
ipack_device in tpci200_slot after the device has been removed.

Signed-off-by: Jens Taprogge <jens.taprogge@taprogge.org>
Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jens Taprogge 2012-09-11 13:35:13 +02:00 committed by Greg Kroah-Hartman
parent 4a589c54ee
commit 6f2c12ae42
2 changed files with 13 additions and 8 deletions
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19
drivers/staging/ipack/bridges/tpci200.c
View file

@ -89,6 +89,7 @@ static irqreturn_t tpci200_interrupt(int irq, void *dev_id)
unsigned short status_reg, reg_value;
unsigned short unhandled_ints = 0;
irqreturn_t ret = IRQ_NONE;
struct slot_irq *slot_irq;
/* Read status register */
status_reg = readw(&tpci200->info->interface_regs->status);
@ -97,15 +98,17 @@ static irqreturn_t tpci200_interrupt(int irq, void *dev_id)
unhandled_ints = status_reg & TPCI200_SLOT_INT_MASK;
/* callback to the IRQ handler for the corresponding slot */
for (i = 0; i < TPCI200_NB_SLOT; i++) {
if ((tpci200->slots[i].irq != NULL) &&
slot_irq = tpci200->slots[i].irq;
if ((slot_irq != NULL) &&
(status_reg & ((TPCI200_A_INT0 | TPCI200_A_INT1) << (2*i)))) {
ret = tpci200->slots[i].irq->handler(tpci200->slots[i].irq->arg);
ret = slot_irq->handler(slot_irq->arg);
/* Dummy reads */
readw(tpci200->slots[i].dev->io_space.address +
readw(slot_irq->holder->io_space.address +
0xC0);
readw(tpci200->slots[i].dev->io_space.address +
readw(slot_irq->holder->io_space.address +
0xC2);
unhandled_ints &= ~(((TPCI200_A_INT0 | TPCI200_A_INT1) << (2*i)));
@ -115,8 +118,10 @@ static irqreturn_t tpci200_interrupt(int irq, void *dev_id)
/* Interrupts not handled are disabled */
if (unhandled_ints) {
for (i = 0; i < TPCI200_NB_SLOT; i++) {
slot_irq = tpci200->slots[i].irq;
if (unhandled_ints & ((TPCI200_INT0_EN | TPCI200_INT1_EN) << (2*i))) {
dev_info(&tpci200->slots[i].dev->dev,
dev_info(&slot_irq->holder->dev,
"No registered ISR for slot [%d:%d]!. IRQ will be disabled.\n",
tpci200->number, i);
reg_value = readw(
@ -487,6 +492,7 @@ static int tpci200_request_irq(struct ipack_device *dev, int vector,
slot_irq->vector = vector;
slot_irq->handler = handler;
slot_irq->arg = arg;
slot_irq->holder = dev;
tpci200->slots[dev->slot].irq = slot_irq;
res = __tpci200_request_irq(tpci200, dev);
@ -701,8 +707,7 @@ static int tpci200_pci_probe(struct pci_dev *pdev,
* The TPCI200 has assigned his own two IRQ by PCI bus driver
*/
for (i = 0; i < TPCI200_NB_SLOT; i++)
tpci200->slots[i].dev =
ipack_device_register(tpci200->info->ipack_bus, i, i);
ipack_device_register(tpci200->info->ipack_bus, i, i);
return 0;
out_err_bus_register:

2
drivers/staging/ipack/bridges/tpci200.h
View file

@ -121,6 +121,7 @@ struct tpci200_regs {
*
*/
struct slot_irq {
struct ipack_device *holder;
int vector;
int (*handler)(void *);
void *arg;
@ -136,7 +137,6 @@ struct slot_irq {
*
*/
struct tpci200_slot {
struct ipack_device *dev;
struct slot_irq *irq;
struct ipack_addr_space io_phys;
struct ipack_addr_space id_phys;