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OpenCloudOS-Kernel
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sfc: Refactor efx_mcdi_poll() by introducing efx_mcdi_poll_once() 

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
This commit is contained in:
Robert Stonehouse 2013-10-09 11:52:43 +01:00 committed by Ben Hutchings
parent 2ec030144f
commit 5731d7b35e
1 changed files with 17 additions and 6 deletions
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23
drivers/net/ethernet/sfc/mcdi.c
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@ -50,6 +50,7 @@ struct efx_mcdi_async_param {
static void efx_mcdi_timeout_async(unsigned long context);
static int efx_mcdi_drv_attach(struct efx_nic *efx, bool driver_operating,
bool *was_attached_out);
static bool efx_mcdi_poll_once(struct efx_nic *efx);
static inline struct efx_mcdi_iface *efx_mcdi(struct efx_nic *efx)
{
@ -237,6 +238,21 @@ static void efx_mcdi_read_response_header(struct efx_nic *efx)
}
}
static bool efx_mcdi_poll_once(struct efx_nic *efx)
{
struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
rmb();
if (!efx->type->mcdi_poll_response(efx))
return false;
spin_lock_bh(&mcdi->iface_lock);
efx_mcdi_read_response_header(efx);
spin_unlock_bh(&mcdi->iface_lock);
return true;
}
static int efx_mcdi_poll(struct efx_nic *efx)
{
struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
@ -272,18 +288,13 @@ static int efx_mcdi_poll(struct efx_nic *efx)
time = jiffies;
rmb();
if (efx->type->mcdi_poll_response(efx))
if (efx_mcdi_poll_once(efx))
break;
if (time_after(time, finish))
return -ETIMEDOUT;
}
spin_lock_bh(&mcdi->iface_lock);
efx_mcdi_read_response_header(efx);
spin_unlock_bh(&mcdi->iface_lock);
/* Return rc=0 like wait_event_timeout() */
return 0;
}