2015-12-20 18:59:38

by Saurabh Sengar

Subject: [PATCH] NFC: added the rx delay parameter for nfcsim workqueue

added the rx delay parameter as a device tunable parameter.

Signed-off-by: Saurabh Sengar <[email protected]>
---
This is a follow up patch after the review comments by Samuel Ortiz
on the initial patch.
Below is the link to original patch which implemented this parameter
as sysfs entry:
https://lkml.org/lkml/2015/12/20/118
drivers/nfc/nfcsim.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/nfc/nfcsim.c b/drivers/nfc/nfcsim.c
index 26ac9e5..93aaca5 100644
--- a/drivers/nfc/nfcsim.c
+++ b/drivers/nfc/nfcsim.c
@@ -32,6 +32,8 @@
#define NFCSIM_POLL_TARGET 2
#define NFCSIM_POLL_DUAL (NFCSIM_POLL_INITIATOR | NFCSIM_POLL_TARGET)

+#define RX_DEFAULT_DELAY 5
+
struct nfcsim {
struct nfc_dev *nfc_dev;

@@ -51,6 +53,8 @@ struct nfcsim {

u8 initiator;

+ u32 rx_delay;
+
data_exchange_cb_t cb;
void *cb_context;

@@ -320,10 +324,9 @@ static int nfcsim_tx(struct nfc_dev *nfc_dev, struct nfc_target *target,
* If packet transmission occurs immediately between them, we have a
* non-stop flow of several tens of thousands SYMM packets per second
* and a burning cpu.
- *
- * TODO: Add support for a sysfs entry to control this delay.
*/
- queue_delayed_work(wq, &peer->recv_work, msecs_to_jiffies(5));
+ queue_delayed_work(wq, &peer->recv_work,
+ msecs_to_jiffies(dev->rx_delay));

mutex_unlock(&peer->lock);

@@ -461,6 +464,7 @@ static struct nfcsim *nfcsim_init_dev(void)
if (rc)
goto free_nfc_dev;

+ dev->rx_delay = RX_DEFAULT_DELAY;
return dev;

free_nfc_dev:
--
1.9.1

2015-12-20 23:08:39

by Samuel Ortiz

Subject: Re: [PATCH] NFC: added the rx delay parameter for nfcsim workqueue

Hi Saurabh,

On Mon, Dec 21, 2015 at 12:29:30AM +0530, Saurabh Sengar wrote:
> added the rx delay parameter as a device tunable parameter.
>
> Signed-off-by: Saurabh Sengar <[email protected]>
> ---
> This is a follow up patch after the review comments by Samuel Ortiz
> on the initial patch.
> Below is the link to original patch which implemented this parameter
> as sysfs entry:
> https://lkml.org/lkml/2015/12/20/118
> drivers/nfc/nfcsim.c | 10 +++++++---
> 1 file changed, 7 insertions(+), 3 deletions(-)
Applied to nfc-next, thanks.

Cheers,
Samuel.