s390/qdio: don't attempt IRQ avoidance on Output SBALs (6d76c898) · Commits · 戴 / test

drivers/s390/cio/qdio_main.c

+6 −11

Original line number	Diff line number	Diff line
		@@ -423,9 +423,6 @@ static inline void account_sbals(struct qdio_q *q, unsigned int count)
		static void process_buffer_error(struct qdio_q *q, unsigned int start,
		int count)
		{
		unsigned char state = (q->is_input_q) ? SLSB_P_INPUT_NOT_INIT :
		SLSB_P_OUTPUT_NOT_INIT;

		q->qdio_error = QDIO_ERROR_SLSB_STATE;

		/* special handling for no target buffer empty */
		@@ -433,7 +430,7 @@ static void process_buffer_error(struct qdio_q *q, unsigned int start,
		q->sbal[start]->element[15].sflags == 0x10) {
		qperf_inc(q, target_full);
		DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "OUTFULL FTC:%02x", start);
		goto set;
		return;
		}

		DBF_ERROR("%4x BUF ERROR", SCH_NO(q));
		@@ -442,13 +439,6 @@ static void process_buffer_error(struct qdio_q *q, unsigned int start,
		DBF_ERROR("F14:%2x F15:%2x",
		q->sbal[start]->element[14].sflags,
		q->sbal[start]->element[15].sflags);

		set:
		/*
		* Interrupts may be avoided as long as the error is present
		* so change the buffer state immediately to avoid starvation.
		*/
		set_buf_states(q, start, state, count);
		}

		static inline void inbound_primed(struct qdio_q *q, unsigned int start,
		@@ -530,6 +520,11 @@ static int get_inbound_buffer_frontier(struct qdio_q *q, unsigned int start)
		return count;
		case SLSB_P_INPUT_ERROR:
		process_buffer_error(q, start, count);
		/*
		* Interrupts may be avoided as long as the error is present
		* so change the buffer state immediately to avoid starvation.
		*/
		set_buf_states(q, start, SLSB_P_INPUT_NOT_INIT, count);
		if (atomic_sub_return(count, &q->nr_buf_used) == 0)
		qperf_inc(q, inbound_queue_full);
		if (q->irq_ptr->perf_stat_enabled)

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