修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

 kernel/drivers/i2c/busses/i2c-ocores.c
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@@ -343,18 +343,18 @@
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  * ocores_isr(), we just add our polling code around it.
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  *
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  * It can run in atomic context
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+ *
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+ * Return: 0 on success, -ETIMEDOUT on timeout
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  */
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-static void ocores_process_polling(struct ocores_i2c *i2c)
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+static int ocores_process_polling(struct ocores_i2c *i2c)
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 {
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-	while (1) {
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-		irqreturn_t ret;
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-		int err;
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+	irqreturn_t ret;
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+	int err = 0;
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+	while (1) {
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 		err = ocores_poll_wait(i2c);
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-		if (err) {
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-			i2c->state = STATE_ERROR;
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+		if (err)
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 			break; /* timeout */
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-		}
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 		ret = ocores_isr(-1, i2c);
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 		if (ret == IRQ_NONE)
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@@ -365,13 +365,15 @@
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 					break;
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 		}
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 	}
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+
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+	return err;
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 }
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 static int ocores_xfer_core(struct ocores_i2c *i2c,
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 			    struct i2c_msg *msgs, int num,
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 			    bool polling)
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 {
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-	int ret;
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+	int ret = 0;
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 	u8 ctrl;
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 	ctrl = oc_getreg(i2c, OCI2C_CONTROL);
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@@ -389,15 +391,16 @@
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 	oc_setreg(i2c, OCI2C_CMD, OCI2C_CMD_START);
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 	if (polling) {
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-		ocores_process_polling(i2c);
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+		ret = ocores_process_polling(i2c);
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 	} else {
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-		ret = wait_event_timeout(i2c->wait,
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-					 (i2c->state == STATE_ERROR) ||
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-					 (i2c->state == STATE_DONE), HZ);
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-		if (ret == 0) {
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-			ocores_process_timeout(i2c);
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-			return -ETIMEDOUT;
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-		}
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+		if (wait_event_timeout(i2c->wait,
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+				       (i2c->state == STATE_ERROR) ||
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+				       (i2c->state == STATE_DONE), HZ) == 0)
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+			ret = -ETIMEDOUT;
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+	}
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+	if (ret) {
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+		ocores_process_timeout(i2c);
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+		return ret;
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 	}
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 	return (i2c->state == STATE_DONE) ? num : -EIO;