sfc: Remove efx_channel::has_interrupt

efx_channel::has_interrupt is redundant with efx_channel::used_flags.

Remove efx_test_eventq() because it is now obviously unreachable.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

4 files changed, 12 insertions, 67 deletions

diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c
index 487df9499c35..2deac7b04282 100644
--- a/drivers/net/sfc/efx.c
+++ b/drivers/net/sfc/efx.c
@@ -259,7 +259,7 @@ void efx_process_channel_now(struct efx_channel *channel)
         falcon_disable_interrupts(efx);
         if (efx->legacy_irq)
                 synchronize_irq(efx->legacy_irq);
-        if (channel->has_interrupt && channel->irq)
+        if (channel->irq)
                 synchronize_irq(channel->irq);
 
         /* Wait for any NAPI processing to complete */
@@ -872,10 +872,8 @@ static void efx_probe_interrupts(struct efx_nic *efx)
                 }
 
                 if (rc == 0) {
-                        for (i = 0; i < efx->rss_queues; i++) {
-                                efx->channel[i].has_interrupt = true;
+                        for (i = 0; i < efx->rss_queues; i++)
                                 efx->channel[i].irq = xentries[i].vector;
-                        }
                 } else {
                         /* Fall back to single channel MSI */
                         efx->interrupt_mode = EFX_INT_MODE_MSI;
@@ -889,7 +887,6 @@ static void efx_probe_interrupts(struct efx_nic *efx)
                 rc = pci_enable_msi(efx->pci_dev);
                 if (rc == 0) {
                         efx->channel[0].irq = efx->pci_dev->irq;
-                        efx->channel[0].has_interrupt = true;
                 } else {
                         EFX_ERR(efx, "could not enable MSI\n");
                         efx->interrupt_mode = EFX_INT_MODE_LEGACY;
@@ -899,9 +896,6 @@ static void efx_probe_interrupts(struct efx_nic *efx)
         /* Assume legacy interrupts */
         if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) {
                 efx->rss_queues = 1;
-                /* Every channel is interruptible */
-                for (i = 0; i < EFX_MAX_CHANNELS; i++)
-                        efx->channel[i].has_interrupt = true;
                 efx->legacy_irq = efx->pci_dev->irq;
         }
 }
@@ -911,7 +905,7 @@ static void efx_remove_interrupts(struct efx_nic *efx)
         struct efx_channel *channel;
 
         /* Remove MSI/MSI-X interrupts */
-        efx_for_each_channel_with_interrupt(channel, efx)
+        efx_for_each_channel(channel, efx)
                 channel->irq = 0;
         pci_disable_msi(efx->pci_dev);
         pci_disable_msix(efx->pci_dev);
@@ -1106,7 +1100,7 @@ static void efx_stop_all(struct efx_nic *efx)
         falcon_disable_interrupts(efx);
         if (efx->legacy_irq)
                 synchronize_irq(efx->legacy_irq);
-        efx_for_each_channel_with_interrupt(channel, efx) {
+        efx_for_each_channel(channel, efx) {
                 if (channel->irq)
                         synchronize_irq(channel->irq);
         }
@@ -1303,7 +1297,7 @@ static void efx_netpoll(struct net_device *net_dev)
         struct efx_nic *efx = netdev_priv(net_dev);
         struct efx_channel *channel;
 
-        efx_for_each_channel_with_interrupt(channel, efx)
+        efx_for_each_channel(channel, efx)
                 efx_schedule_channel(channel);
 }
 
diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index 30176390481c..40dd643e930d 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -1317,7 +1317,7 @@ void falcon_enable_interrupts(struct efx_nic *efx)
 
         /* Force processing of all the channels to get the EVQ RPTRs up to
            date */
-        efx_for_each_channel_with_interrupt(channel, efx)
+        efx_for_each_channel(channel, efx)
                 efx_schedule_channel(channel);
 }
 
@@ -1567,7 +1567,7 @@ int falcon_init_interrupt(struct efx_nic *efx)
         }
 
         /* Hook MSI or MSI-X interrupt */
-        efx_for_each_channel_with_interrupt(channel, efx) {
+        efx_for_each_channel(channel, efx) {
                 rc = request_irq(channel->irq, falcon_msi_interrupt,
                                  IRQF_PROBE_SHARED, /* Not shared */
                                  efx->name, channel);
@@ -1580,7 +1580,7 @@ int falcon_init_interrupt(struct efx_nic *efx)
         return 0;
 
  fail2:
-        efx_for_each_channel_with_interrupt(channel, efx)
+        efx_for_each_channel(channel, efx)
                 free_irq(channel->irq, channel);
  fail1:
         return rc;
@@ -1592,7 +1592,7 @@ void falcon_fini_interrupt(struct efx_nic *efx)
         efx_oword_t reg;
 
         /* Disable MSI/MSI-X interrupts */
-        efx_for_each_channel_with_interrupt(channel, efx) {
+        efx_for_each_channel(channel, efx) {
                 if (channel->irq)
                         free_irq(channel->irq, channel);
         }
diff --git a/drivers/net/sfc/net_driver.h b/drivers/net/sfc/net_driver.h
index 390275710ef4..1fa134ab8eb8 100644
--- a/drivers/net/sfc/net_driver.h
+++ b/drivers/net/sfc/net_driver.h
@@ -329,7 +329,6 @@ enum efx_rx_alloc_method {
  * @used_flags: Channel is used by net driver
  * @enabled: Channel enabled indicator
  * @irq: IRQ number (MSI and MSI-X only)
- * @has_interrupt: Channel has an interrupt
  * @irq_moderation: IRQ moderation value (in us)
  * @napi_dev: Net device used with NAPI
  * @napi_str: NAPI control structure
@@ -361,7 +360,6 @@ struct efx_channel {
         int used_flags;
         bool enabled;
         int irq;
-        bool has_interrupt;
         unsigned int irq_moderation;
         struct net_device *napi_dev;
         struct napi_struct napi_str;
@@ -834,15 +832,6 @@ struct efx_nic_type {
                         continue;                                       \
                 else
 
-/* Iterate over all used channels with interrupts */
-#define efx_for_each_channel_with_interrupt(_channel, _efx)             \
-        for (_channel = &_efx->channel[0];                              \
-             _channel < &_efx->channel[EFX_MAX_CHANNELS];               \
-             _channel++)                                                \
-                if (!(_channel->used_flags && _channel->has_interrupt)) \
-                        continue;                                       \
-                else
-
 /* Iterate over all used TX queues */
 #define efx_for_each_tx_queue(_tx_queue, _efx)                          \
         for (_tx_queue = &_efx->tx_queue[0];                            \
diff --git a/drivers/net/sfc/selftest.c b/drivers/net/sfc/selftest.c
index ff7b84c3fcfb..2f7def657679 100644
--- a/drivers/net/sfc/selftest.c
+++ b/drivers/net/sfc/selftest.c
@@ -111,7 +111,7 @@ static int efx_test_interrupts(struct efx_nic *efx,
 
         /* ACK each interrupting event queue. Receiving an interrupt due to
          * traffic before a test event is raised is considered a pass */
-        efx_for_each_channel_with_interrupt(channel, efx) {
+        efx_for_each_channel(channel, efx) {
                 if (channel->work_pending)
                         efx_process_channel_now(channel);
                 if (efx->last_irq_cpu >= 0)
@@ -136,41 +136,6 @@ static int efx_test_interrupts(struct efx_nic *efx,
         return 0;
 }
 
-/* Test generation and receipt of non-interrupting events */
-static int efx_test_eventq(struct efx_channel *channel,
-                           struct efx_self_tests *tests)
-{
-        unsigned int magic;
-
-        /* Channel specific code, limited to 20 bits */
-        magic = (0x00010150 + channel->channel);
-        EFX_LOG(channel->efx, "channel %d testing event queue with code %x\n",
-                channel->channel, magic);
-
-        tests->eventq_dma[channel->channel] = -1;
-        tests->eventq_int[channel->channel] = 1;        /* fake pass */
-        tests->eventq_poll[channel->channel] = 1;       /* fake pass */
-
-        /* Reset flag and zero magic word */
-        channel->efx->last_irq_cpu = -1;
-        channel->eventq_magic = 0;
-        smp_wmb();
-
-        falcon_generate_test_event(channel, magic);
-        udelay(1);
-
-        efx_process_channel_now(channel);
-        if (channel->eventq_magic != magic) {
-                EFX_ERR(channel->efx, "channel %d  failed to see test event\n",
-                        channel->channel);
-                return -ETIMEDOUT;
-        } else {
-                tests->eventq_dma[channel->channel] = 1;
-        }
-
-        return 0;
-}
-
 /* Test generation and receipt of interrupting events */
 static int efx_test_eventq_irq(struct efx_channel *channel,
                                struct efx_self_tests *tests)
@@ -456,7 +421,7 @@ static int efx_poll_loopback(struct efx_nic *efx)
 
         /* NAPI polling is not enabled, so process channels
          * synchronously */
-        efx_for_each_channel_with_interrupt(channel, efx) {
+        efx_for_each_channel(channel, efx) {
                 if (channel->work_pending)
                         efx_process_channel_now(channel);
         }
@@ -689,10 +654,7 @@ int efx_online_test(struct efx_nic *efx, struct efx_self_tests *tests)
         if (rc)
                 return rc;
         efx_for_each_channel(channel, efx) {
-                if (channel->has_interrupt)
-                        rc = efx_test_eventq_irq(channel, tests);
-                else
-                        rc = efx_test_eventq(channel, tests);
+                rc = efx_test_eventq_irq(channel, tests);
                 if (rc)
                         return rc;
         }