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gpio/aspeed: Fix incorrect number of banks

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[ Upstream commit 3c4710ae6f ]

The current calculation for the number of GPIO banks is only correct if
the number of GPIOs is a multiple of 32 (if there were 31 GPIOs we would
currently say there are 0 banks, which is incorrect).

Fixes: 361b79119a ('gpio: Add Aspeed driver')

Signed-off-by: Rashmica Gupta <rashmica.g@gmail.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Link: https://lore.kernel.org/r/20190906062623.13354-1-rashmica.g@gmail.com
Reviewed-by: Joel Stanley <joel@jms.d.au>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Rashmica Gupta 2019-09-06 16:26:22 +10:00 committed by Greg Kroah-Hartman
parent 9de3a3a7a1
commit 5207c6d79d
1 changed files with 1 additions and 1 deletions
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2
drivers/gpio/gpio-aspeed.c
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@ -1199,7 +1199,7 @@ static int __init aspeed_gpio_probe(struct platform_device *pdev)
gpio->chip.irq.need_valid_mask = true;
/* Allocate a cache of the output registers */
banks = gpio->config->nr_gpios >> 5;
banks = DIV_ROUND_UP(gpio->config->nr_gpios, 32);
gpio->dcache = devm_kcalloc(&pdev->dev,
banks, sizeof(u32), GFP_KERNEL);
if (!gpio->dcache)