From c557fa3e4c156b8713c177d9dde08920130bf551 Mon Sep 17 00:00:00 2001 From: Dmitry Baryshkov Date: Wed, 15 Oct 2008 22:03:11 -0700 Subject: [PATCH] gpio: max7301: fix the race between chip addition and pins reconfiguration There is a small race and code ugliness in max7301: pins are reconfigured after the chip is registered. Swap these calls so that the device is registered in correct state. Also this fixes the comile-time warning about unchecked gpiochip_remove. Signed-off-by: Dmitry Baryshkov Cc: Juergen Beisert Cc: Guennadi Liakhovetski Cc: Russell King Cc: David Brownell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/gpio/max7301.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) diff --git a/drivers/gpio/max7301.c b/drivers/gpio/max7301.c index 1b5ad97..8b24d78 100644 --- a/drivers/gpio/max7301.c +++ b/drivers/gpio/max7301.c @@ -255,10 +255,6 @@ static int __devinit max7301_probe(struct spi_device *spi) ts->chip.dev = &spi->dev; ts->chip.owner = THIS_MODULE; - ret = gpiochip_add(&ts->chip); - if (ret) - goto exit_destroy; - /* * tristate all pins in hardware and cache the * register values for later use. @@ -269,17 +265,19 @@ static int __devinit max7301_probe(struct spi_device *spi) max7301_write(spi, 0x08 + i, 0xAA); ts->port_config[i] = 0xAA; for (j = 0; j < 4; j++) { - int idx = ts->chip.base + (i - 1) * 4 + j; - ret = gpio_direction_input(idx); + int offset = (i - 1) * 4 + j; + ret = max7301_direction_input(&ts->chip, offset); if (ret) - goto exit_remove; - gpio_free(idx); + goto exit_destroy; } } + + ret = gpiochip_add(&ts->chip); + if (ret) + goto exit_destroy; + return ret; -exit_remove: - gpiochip_remove(&ts->chip); exit_destroy: dev_set_drvdata(&spi->dev, NULL); mutex_destroy(&ts->lock); -- 2.7.4