linux-kernel - [PATCH 3.16 227/294] spi/atmel: Fix pointer to int conversion warnings on 64 bit builds

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Message-ID: <lsq.1510009382.179539027@decadent.org.uk>
Date:   Mon, 06 Nov 2017 23:03:02 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Mark Brown" <broonie@...aro.org>,
        "Arnd Bergmann" <arnd@...db.de>
Subject: [PATCH 3.16 227/294] spi/atmel: Fix pointer to int conversion
 warnings on 64 bit builds

3.16.50-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Mark Brown <broonie@...aro.org>

commit 67f08d690aa90e47a0e793fc63e2ecbe95d29839 upstream.

On 64 bit systems integers are generally still 32 bit but long values and
pointers are usually 64 bit. GCC warns when casting a 64 bit pointer into
a 32 bit integer so cast to a long instead in order to avoid warnings.

Signed-off-by: Mark Brown <broonie@...aro.org>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/spi/spi-atmel.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -1020,7 +1020,7 @@ static int atmel_spi_setup(struct spi_de
 	csr |= SPI_BF(DLYBCT, 0);
 
 	/* chipselect must have been muxed as GPIO (e.g. in board setup) */
-	npcs_pin = (unsigned int)spi->controller_data;
+	npcs_pin = (unsigned long)spi->controller_data;
 
 	if (gpio_is_valid(spi->cs_gpio))
 		npcs_pin = spi->cs_gpio;
@@ -1255,7 +1255,7 @@ msg_done:
 static void atmel_spi_cleanup(struct spi_device *spi)
 {
 	struct atmel_spi_device	*asd = spi->controller_state;
-	unsigned		gpio = (unsigned) spi->controller_data;
+	unsigned		gpio = (unsigned long) spi->controller_data;
 
 	if (!asd)
 		return;