linux-kernel - [PATCH v3 03/14] spi: Refactor bus number assigning code in spi_register

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Message-Id: <20230711171756.86736-4-andriy.shevchenko@linux.intel.com>
Date:   Tue, 11 Jul 2023 20:17:45 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Mark Brown <broonie@...nel.org>,
        Cristian Ciocaltea <cristian.ciocaltea@...labora.com>,
        Yang Yingliang <yangyingliang@...wei.com>,
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Subject: [PATCH v3 03/14] spi: Refactor bus number assigning code in spi_register_controller()

Instead of 'else' branching use two sequential if:s, which allows
to re-use the logic of IDR allocation in both cases.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/spi/spi.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index d8064998aa27..6d74218cf38e 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -3122,8 +3122,8 @@ int spi_register_controller(struct spi_controller *ctlr)
 {
 	struct device		*dev = ctlr->dev.parent;
 	struct boardinfo	*bi;
+	int			first_dynamic;
 	int			status;
-	int			id, first_dynamic;
 
 	if (!dev)
 		return -ENODEV;
@@ -3136,19 +3136,13 @@ int spi_register_controller(struct spi_controller *ctlr)
 	if (status)
 		return status;
 
+	if (ctlr->bus_num < 0)
+		ctlr->bus_num = of_alias_get_id(ctlr->dev.of_node, "spi");
 	if (ctlr->bus_num >= 0) {
 		/* Devices with a fixed bus num must check-in with the num */
 		status = spi_controller_id_alloc(ctlr, ctlr->bus_num, ctlr->bus_num + 1);
 		if (status)
 			return status;
-	} else {
-		/* Allocate dynamic bus number using Linux idr */
-		id = of_alias_get_id(ctlr->dev.of_node, "spi");
-		if (id >= 0) {
-			status = spi_controller_id_alloc(ctlr, id, id + 1);
-			if (status)
-				return status;
-		}
 	}
 	if (ctlr->bus_num < 0) {
 		first_dynamic = of_alias_get_highest_id("spi");
-- 
2.40.0.1.gaa8946217a0b