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[media] rc: Fix input deadlock and transmit error in redrat3 driver 

Fixed submit urb logic so hardware doesn't hang trying to transmit
signal data

Removed unneeded enable/disable detector commands in
redrat3_transmit_ir (the hardware does this anyway) and converted
arguments to unsigned as per 5588dc2

Signed-off-by: Andrew Vincer <andrew@redrat.co.uk>
Cc: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Andrew Vincer 2011-11-08 12:43:45 -03:00 коммит произвёл Mauro Carvalho Chehab
Родитель 9369cc96af
Коммит dbea188036
1 изменённых файлов: 18 добавлений и 34 удалений
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52
drivers/media/rc/redrat3.c
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@ -286,12 +286,6 @@ static void redrat3_issue_async(struct redrat3_dev *rr3)
rr3_ftr(rr3->dev, "Entering %s\n", __func__);
if (!rr3->det_enabled) {
dev_warn(rr3->dev, "not issuing async read, "
"detector not enabled\n");
return;
}
memset(rr3->bulk_in_buf, 0, rr3->ep_in->wMaxPacketSize);
res = usb_submit_urb(rr3->read_urb, GFP_ATOMIC);
if (res)
@ -827,6 +821,7 @@ out:
static void redrat3_handle_async(struct urb *urb, struct pt_regs *regs)
{
struct redrat3_dev *rr3;
int ret;
if (!urb)
return;
@ -840,15 +835,13 @@ static void redrat3_handle_async(struct urb *urb, struct pt_regs *regs)
rr3_ftr(rr3->dev, "Entering %s\n", __func__);
if (!rr3->det_enabled) {
rr3_dbg(rr3->dev, "received a read callback but detector "
"disabled - ignoring\n");
return;
}
switch (urb->status) {
case 0:
redrat3_get_ir_data(rr3, urb->actual_length);
ret = redrat3_get_ir_data(rr3, urb->actual_length);
if (!ret) {
/* no error, prepare to read more */
redrat3_issue_async(rr3);
}
break;
case -ECONNRESET:
@ -865,11 +858,6 @@ static void redrat3_handle_async(struct urb *urb, struct pt_regs *regs)
rr3->pkttype = 0;
break;
}
if (!rr3->transmitting)
redrat3_issue_async(rr3);
else
rr3_dbg(rr3->dev, "IR transmit in progress\n");
}
static void redrat3_write_bulk_callback(struct urb *urb, struct pt_regs *regs)
@ -896,21 +884,24 @@ static u16 mod_freq_to_val(unsigned int mod_freq)
return (u16)(65536 - (mult / mod_freq));
}
static int redrat3_set_tx_carrier(struct rc_dev *dev, u32 carrier)
static int redrat3_set_tx_carrier(struct rc_dev *rcdev, u32 carrier)
{
struct redrat3_dev *rr3 = dev->priv;
struct redrat3_dev *rr3 = rcdev->priv;
struct device *dev = rr3->dev;
rr3_dbg(dev, "Setting modulation frequency to %u", carrier);
rr3->carrier = carrier;
return carrier;
}
static int redrat3_transmit_ir(struct rc_dev *rcdev, int *txbuf, u32 n)
static int redrat3_transmit_ir(struct rc_dev *rcdev, unsigned *txbuf,
unsigned count)
{
struct redrat3_dev *rr3 = rcdev->priv;
struct device *dev = rr3->dev;
struct redrat3_signal_header header;
int i, j, count, ret, ret_len, offset;
int i, j, ret, ret_len, offset;
int lencheck, cur_sample_len, pipe;
char *buffer = NULL, *sigdata = NULL;
int *sample_lens = NULL;
@ -928,20 +919,13 @@ static int redrat3_transmit_ir(struct rc_dev *rcdev, int *txbuf, u32 n)
return -EAGAIN;
}
count = n / sizeof(int);
if (count > (RR3_DRIVER_MAXLENS * 2))
return -EINVAL;
/* rr3 will disable rc detector on transmit */
rr3->det_enabled = false;
rr3->transmitting = true;
redrat3_disable_detector(rr3);
if (rr3->det_enabled) {
dev_err(dev, "%s: cannot tx while rx is enabled\n", __func__);
ret = -EIO;
goto out;
}
sample_lens = kzalloc(sizeof(int) * RR3_DRIVER_MAXLENS, GFP_KERNEL);
if (!sample_lens) {
ret = -ENOMEM;
@ -1055,7 +1039,7 @@ static int redrat3_transmit_ir(struct rc_dev *rcdev, int *txbuf, u32 n)
if (ret < 0)
dev_err(dev, "Error: control msg send failed, rc %d\n", ret);
else
ret = n;
ret = count;
out:
kfree(sample_lens);
@ -1063,8 +1047,8 @@ out:
kfree(sigdata);
rr3->transmitting = false;
redrat3_enable_detector(rr3);
/* rr3 re-enables rc detector because it was enabled before */
rr3->det_enabled = true;
return ret;
}