diff options
| -rw-r--r-- | drivers/media/rc/iguanair.c | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/drivers/media/rc/iguanair.c b/drivers/media/rc/iguanair.c index f1c5846b35f4..68172585c961 100644 --- a/drivers/media/rc/iguanair.c +++ b/drivers/media/rc/iguanair.c @@ -327,7 +327,7 @@ static int iguanair_tx(struct rc_dev *dev, unsigned *txbuf, unsigned count) { struct iguanair *ir = dev->priv; uint8_t space, *payload; - unsigned i, size, rc; + unsigned i, size, rc, bytes; struct send_packet *packet; mutex_lock(&ir->lock); @@ -335,17 +335,22 @@ static int iguanair_tx(struct rc_dev *dev, unsigned *txbuf, unsigned count) /* convert from us to carrier periods */ for (i = size = 0; i < count; i++) { txbuf[i] = DIV_ROUND_CLOSEST(txbuf[i] * ir->carrier, 1000000); - size += (txbuf[i] + 126) / 127; + bytes = (txbuf[i] + 126) / 127; + if (size + bytes > ir->bufsize) { + count = i; + break; + } + size += bytes; } - packet = kmalloc(sizeof(*packet) + size, GFP_KERNEL); - if (!packet) { - rc = -ENOMEM; + if (count == 0) { + rc = -EINVAL; goto out; } - if (size > ir->bufsize) { - rc = -E2BIG; + packet = kmalloc(sizeof(*packet) + size, GFP_KERNEL); + if (!packet) { + rc = -ENOMEM; goto out; } @@ -376,7 +381,7 @@ static int iguanair_tx(struct rc_dev *dev, unsigned *txbuf, unsigned count) rc = iguanair_receiver(ir, false); if (rc) { dev_warn(ir->dev, "disable receiver before transmit failed\n"); - goto out; + goto out_kfree; } } @@ -392,11 +397,12 @@ static int iguanair_tx(struct rc_dev *dev, unsigned *txbuf, unsigned count) dev_warn(ir->dev, "re-enable receiver after transmit failed\n"); } +out_kfree: + kfree(packet); out: mutex_unlock(&ir->lock); - kfree(packet); - return rc; + return rc ? rc : count; } static int iguanair_open(struct rc_dev *rdev) @@ -444,7 +450,7 @@ static int __devinit iguanair_probe(struct usb_interface *intf, ir = kzalloc(sizeof(*ir), GFP_KERNEL); rc = rc_allocate_device(); if (!ir || !rc) { - ret = ENOMEM; + ret = -ENOMEM; goto out; } @@ -453,7 +459,7 @@ static int __devinit iguanair_probe(struct usb_interface *intf, ir->urb_in = usb_alloc_urb(0, GFP_KERNEL); if (!ir->buf_in || !ir->urb_in) { - ret = ENOMEM; + ret = -ENOMEM; goto out; } |