diff options
Diffstat (limited to 'kernel/drivers/net/ieee802154/dw3000_nfcc_coex_mcps.c')
| -rw-r--r-- | kernel/drivers/net/ieee802154/dw3000_nfcc_coex_mcps.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/kernel/drivers/net/ieee802154/dw3000_nfcc_coex_mcps.c b/kernel/drivers/net/ieee802154/dw3000_nfcc_coex_mcps.c index 2214859..ce3343c 100644 --- a/kernel/drivers/net/ieee802154/dw3000_nfcc_coex_mcps.c +++ b/kernel/drivers/net/ieee802154/dw3000_nfcc_coex_mcps.c @@ -29,6 +29,7 @@ #include "dw3000_core.h" #define DW3000_NFCC_COEX_WATCHDOG_DEFAULT_DURATION_MS 24000 +#define DW3000_MARGIN_TO_ENTER_IDLE 2 static int dw3000_nfcc_coex_wakeup_and_send(struct dw3000 *dw, s32 idle_duration_dtu, @@ -40,7 +41,13 @@ static int dw3000_nfcc_coex_wakeup_and_send(struct dw3000 *dw, trace_dw3000_nfcc_coex_wakeup_and_send( dw, nfcc_coex->send, idle_duration_dtu, send_timestamp_dtu); - if (idle_duration_dtu > dw->llhw->anticip_dtu) { + if (idle_duration_dtu > + DW3000_MARGIN_TO_ENTER_IDLE * dw->llhw->anticip_dtu) { + /* If idle_duration_dtu is too close to anticip_dtu, the + * idle_delay computed in dw3000_idle might end up negative + * and fail with -ETIME. A DW3000_MARGIN_TO_ENTER_IDLE + * multiplicator is used to avoid this. + */ r = dw3000_idle(dw, true, send_timestamp_dtu, dw3000_nfcc_coex_idle_timeout, DW3000_OP_STATE_MAX); |