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authorBen Hutchings <ben@decadent.org.uk>2012-05-14 21:36:00 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-05-20 11:43:05 -0300
commitf27b853ea24a9b70585f9251384d97929e6551c3 (patch)
tree3ee3779961fb8356a54156fb472cb4a87ca9473f /drivers/media/rc/nuvoton-cir.c
parent81cda577422b85f98efc350e2520f2a2dc5f3ddb (diff)
[media] rc: Fix invalid free_region and/or free_irq on probe failure
fintek-cir, ite-cir and nuvoton-cir may try to free an I/O region and/or IRQ handler that was never allocated after a failure in their respective probe functions. Add and use separate labels on the failure path so they will do the right cleanup after each possible point of failure. Compile-tested only. Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/rc/nuvoton-cir.c')
-rw-r--r--drivers/media/rc/nuvoton-cir.c26
1 files changed, 12 insertions, 14 deletions
diff --git a/drivers/media/rc/nuvoton-cir.c b/drivers/media/rc/nuvoton-cir.c
index 8b2c071ac0a..dc8a7dddccd 100644
--- a/drivers/media/rc/nuvoton-cir.c
+++ b/drivers/media/rc/nuvoton-cir.c
@@ -1075,19 +1075,19 @@ static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
if (request_irq(nvt->cir_irq, nvt_cir_isr, IRQF_SHARED,
NVT_DRIVER_NAME, (void *)nvt))
- goto failure;
+ goto failure2;
if (!request_region(nvt->cir_wake_addr,
CIR_IOREG_LENGTH, NVT_DRIVER_NAME))
- goto failure;
+ goto failure3;
if (request_irq(nvt->cir_wake_irq, nvt_cir_wake_isr, IRQF_SHARED,
NVT_DRIVER_NAME, (void *)nvt))
- goto failure;
+ goto failure4;
ret = rc_register_device(rdev);
if (ret)
- goto failure;
+ goto failure5;
device_init_wakeup(&pdev->dev, true);
nvt->rdev = rdev;
@@ -1099,17 +1099,15 @@ static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
return 0;
+failure5:
+ free_irq(nvt->cir_wake_irq, nvt);
+failure4:
+ release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH);
+failure3:
+ free_irq(nvt->cir_irq, nvt);
+failure2:
+ release_region(nvt->cir_addr, CIR_IOREG_LENGTH);
failure:
- if (nvt->cir_irq)
- free_irq(nvt->cir_irq, nvt);
- if (nvt->cir_addr)
- release_region(nvt->cir_addr, CIR_IOREG_LENGTH);
-
- if (nvt->cir_wake_irq)
- free_irq(nvt->cir_wake_irq, nvt);
- if (nvt->cir_wake_addr)
- release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH);
-
rc_free_device(rdev);
kfree(nvt);