linux-kernel - [PATCH 14/62] gpio: convert to idr

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Date:	Sat,  2 Feb 2013 17:20:15 -0800
From:	Tejun Heo <tj@...nel.org>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, rusty@...tcorp.com.au,
	bfields@...ldses.org, skinsbursky@...allels.com,
	ebiederm@...ssion.com, jmorris@...ei.org, axboe@...nel.dk,
	Tejun Heo <tj@...nel.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH 14/62] gpio: convert to idr_alloc()

Convert to the much saner new idr interface.

Only compile tested.

Signed-off-by: Tejun Heo <tj@...nel.org>
Cc: Grant Likely <grant.likely@...retlab.ca>
Cc: Linus Walleij <linus.walleij@...aro.org>
---
This patch depends on an earlier idr changes and I think it would be
best to route these together through -mm.  Please holler if there's
any objection.  Thanks.

 drivers/gpio/gpiolib.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 199fca1..c32ba9a 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -399,15 +399,10 @@ static int gpio_setup_irq(struct gpio_desc *desc, struct device *dev,
 			goto err_out;
 		}
 
-		do {
-			ret = -ENOMEM;
-			if (idr_pre_get(&dirent_idr, GFP_KERNEL))
-				ret = idr_get_new_above(&dirent_idr, value_sd,
-							1, &id);
-		} while (ret == -EAGAIN);
-
-		if (ret)
+		ret = idr_alloc(&dirent_idr, value_sd, 1, 0, GFP_KERNEL);
+		if (ret < 0)
 			goto free_sd;
+		id = ret;
 
 		desc->flags &= GPIO_FLAGS_MASK;
 		desc->flags |= (unsigned long)id << ID_SHIFT;
-- 
1.8.1

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