t3_sge_stop() is called from task context and from error handlers in
interrupt context. It relies on in_interrupt() to differentiate the
contexts.
in_interrupt() is deprecated as it is ill defined and does not provide what
it suggests.
Instead of replacing it with some other construct, simply split the
function into t3_sge_stop_dma(), which can be called from any context, and
t3_sge_stop() which can be only called from task context.
This has the advantage that any bogus invocation of t3_sge_stop() from
wrong contexts can be caught by debug kernels instead of being papered over
by the conditional.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
void t3_os_link_fault_handler(struct adapter *adapter, int port_id);
void t3_sge_start(struct adapter *adap);
void t3_os_link_fault_handler(struct adapter *adapter, int port_id);
void t3_sge_start(struct adapter *adap);
+void t3_sge_stop_dma(struct adapter *adap);
void t3_sge_stop(struct adapter *adap);
void t3_start_sge_timers(struct adapter *adap);
void t3_stop_sge_timers(struct adapter *adap);
void t3_sge_stop(struct adapter *adap);
void t3_start_sge_timers(struct adapter *adap);
void t3_stop_sge_timers(struct adapter *adap);
unsigned int fw_status[4];
if (adapter->flags & FULL_INIT_DONE) {
unsigned int fw_status[4];
if (adapter->flags & FULL_INIT_DONE) {
+ t3_sge_stop_dma(adapter);
t3_write_reg(adapter, A_XGM_TX_CTRL, 0);
t3_write_reg(adapter, A_XGM_RX_CTRL, 0);
t3_write_reg(adapter, XGM_REG(A_XGM_TX_CTRL, 1), 0);
t3_write_reg(adapter, A_XGM_TX_CTRL, 0);
t3_write_reg(adapter, A_XGM_RX_CTRL, 0);
t3_write_reg(adapter, XGM_REG(A_XGM_TX_CTRL, 1), 0);
- * t3_sge_stop - disable SGE operation
+ * t3_sge_stop_dma - Disable SGE DMA engine operation
- * Disables the DMA engine. This can be called in emeregencies (e.g.,
- * from error interrupts) or from normal process context. In the latter
- * case it also disables any pending queue restart tasklets. Note that
- * if it is called in interrupt context it cannot disable the restart
- * tasklets as it cannot wait, however the tasklets will have no effect
- * since the doorbells are disabled and the driver will call this again
- * later from process context, at which time the tasklets will be stopped
- * if they are still running.
+ * Can be invoked from interrupt context e.g. error handler.
+ *
+ * Note that this function cannot disable the restart of tasklets as
+ * it cannot wait if called from interrupt context, however the
+ * tasklets will have no effect since the doorbells are disabled. The
+ * driver will call tg3_sge_stop() later from process context, at
+ * which time the tasklets will be stopped if they are still running.
-void t3_sge_stop(struct adapter *adap)
+void t3_sge_stop_dma(struct adapter *adap)
{
t3_set_reg_field(adap, A_SG_CONTROL, F_GLOBALENABLE, 0);
{
t3_set_reg_field(adap, A_SG_CONTROL, F_GLOBALENABLE, 0);
- if (!in_interrupt()) {
- int i;
+}
+
+/**
+ * t3_sge_stop - disable SGE operation completly
+ * @adap: the adapter
+ *
+ * Called from process context. Disables the DMA engine and any
+ * pending queue restart tasklets.
+ */
+void t3_sge_stop(struct adapter *adap)
+{
+ int i;
- for (i = 0; i < SGE_QSETS; ++i) {
- struct sge_qset *qs = &adap->sge.qs[i];
- tasklet_kill(&qs->txq[TXQ_OFLD].qresume_tsk);
- tasklet_kill(&qs->txq[TXQ_CTRL].qresume_tsk);
- }
+ for (i = 0; i < SGE_QSETS; ++i) {
+ struct sge_qset *qs = &adap->sge.qs[i];
+
+ tasklet_kill(&qs->txq[TXQ_OFLD].qresume_tsk);
+ tasklet_kill(&qs->txq[TXQ_CTRL].qresume_tsk);