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authorLuis Henriques <luis.henriques@canonical.com>2012-04-21 12:25:21 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-04-26 15:41:16 -0300
commit9ef449c6b31bb6a8e6dedc24de475a3b8c79be20 (patch)
tree03b61f0a0288416b83063099c15be28eead02ebe /drivers/media/rc/winbond-cir.c
parent9967232f1be5bab10c7b7a8dcf51ff5c3c1a6d77 (diff)
[media] rc: Postpone ISR registration
An early registration of an ISR was causing a crash to several users (for example, with the ite-cir driver: http://bugs.launchpad.net/bugs/972723). The reason was that IRQs were being triggered before a driver initialisation was completed. This patch fixes this by moving the invocation to request_irq() and to request_region() to a later stage on the driver probe function. Cc: <stable@vger.kernel.org> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> Acked-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/rc/winbond-cir.c')
-rw-r--r--drivers/media/rc/winbond-cir.c78
1 files changed, 39 insertions, 39 deletions
diff --git a/drivers/media/rc/winbond-cir.c b/drivers/media/rc/winbond-cir.c
index af526586fa26..342c2c8c1ddf 100644
--- a/drivers/media/rc/winbond-cir.c
+++ b/drivers/media/rc/winbond-cir.c
@@ -991,39 +991,10 @@ wbcir_probe(struct pnp_dev *device, const struct pnp_device_id *dev_id)
"(w: 0x%lX, e: 0x%lX, s: 0x%lX, i: %u)\n",
data->wbase, data->ebase, data->sbase, data->irq);
- if (!request_region(data->wbase, WAKEUP_IOMEM_LEN, DRVNAME)) {
- dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
- data->wbase, data->wbase + WAKEUP_IOMEM_LEN - 1);
- err = -EBUSY;
- goto exit_free_data;
- }
-
- if (!request_region(data->ebase, EHFUNC_IOMEM_LEN, DRVNAME)) {
- dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
- data->ebase, data->ebase + EHFUNC_IOMEM_LEN - 1);
- err = -EBUSY;
- goto exit_release_wbase;
- }
-
- if (!request_region(data->sbase, SP_IOMEM_LEN, DRVNAME)) {
- dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
- data->sbase, data->sbase + SP_IOMEM_LEN - 1);
- err = -EBUSY;
- goto exit_release_ebase;
- }
-
- err = request_irq(data->irq, wbcir_irq_handler,
- IRQF_DISABLED, DRVNAME, device);
- if (err) {
- dev_err(dev, "Failed to claim IRQ %u\n", data->irq);
- err = -EBUSY;
- goto exit_release_sbase;
- }
-
led_trigger_register_simple("cir-tx", &data->txtrigger);
if (!data->txtrigger) {
err = -ENOMEM;
- goto exit_free_irq;
+ goto exit_free_data;
}
led_trigger_register_simple("cir-rx", &data->rxtrigger);
@@ -1062,9 +1033,38 @@ wbcir_probe(struct pnp_dev *device, const struct pnp_device_id *dev_id)
data->dev->priv = data;
data->dev->dev.parent = &device->dev;
+ if (!request_region(data->wbase, WAKEUP_IOMEM_LEN, DRVNAME)) {
+ dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
+ data->wbase, data->wbase + WAKEUP_IOMEM_LEN - 1);
+ err = -EBUSY;
+ goto exit_free_rc;
+ }
+
+ if (!request_region(data->ebase, EHFUNC_IOMEM_LEN, DRVNAME)) {
+ dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
+ data->ebase, data->ebase + EHFUNC_IOMEM_LEN - 1);
+ err = -EBUSY;
+ goto exit_release_wbase;
+ }
+
+ if (!request_region(data->sbase, SP_IOMEM_LEN, DRVNAME)) {
+ dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
+ data->sbase, data->sbase + SP_IOMEM_LEN - 1);
+ err = -EBUSY;
+ goto exit_release_ebase;
+ }
+
+ err = request_irq(data->irq, wbcir_irq_handler,
+ IRQF_DISABLED, DRVNAME, device);
+ if (err) {
+ dev_err(dev, "Failed to claim IRQ %u\n", data->irq);
+ err = -EBUSY;
+ goto exit_release_sbase;
+ }
+
err = rc_register_device(data->dev);
if (err)
- goto exit_free_rc;
+ goto exit_free_irq;
device_init_wakeup(&device->dev, 1);
@@ -1072,14 +1072,6 @@ wbcir_probe(struct pnp_dev *device, const struct pnp_device_id *dev_id)
return 0;
-exit_free_rc:
- rc_free_device(data->dev);
-exit_unregister_led:
- led_classdev_unregister(&data->led);
-exit_unregister_rxtrigger:
- led_trigger_unregister_simple(data->rxtrigger);
-exit_unregister_txtrigger:
- led_trigger_unregister_simple(data->txtrigger);
exit_free_irq:
free_irq(data->irq, device);
exit_release_sbase:
@@ -1088,6 +1080,14 @@ exit_release_ebase:
release_region(data->ebase, EHFUNC_IOMEM_LEN);
exit_release_wbase:
release_region(data->wbase, WAKEUP_IOMEM_LEN);
+exit_free_rc:
+ rc_free_device(data->dev);
+exit_unregister_led:
+ led_classdev_unregister(&data->led);
+exit_unregister_rxtrigger:
+ led_trigger_unregister_simple(data->rxtrigger);
+exit_unregister_txtrigger:
+ led_trigger_unregister_simple(data->txtrigger);
exit_free_data:
kfree(data);
pnp_set_drvdata(device, NULL);