linux-kernel - [PATCH 2/2] mmc: atmel-mci: Release mmc resources on failure in probe

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Date:	Sat, 20 Sep 2014 12:22:31 +0530
From:	Pramod Gurav <pramod.gurav@...rtplayin.com>
To:	linux-kernel@...r.kernel.org
Cc:	Pramod Gurav <pramod.gurav@...rtplayin.com>,
	Ludovic Desroches <ludovic.desroches@...el.com>,
	Chris Ball <chris@...ntf.net>,
	Ulf Hansson <ulf.hansson@...aro.org>, linux-mmc@...r.kernel.org
Subject: [PATCH 2/2] mmc: atmel-mci: Release mmc resources on failure in probe

This change takes care of releasing mmc resources on error cases in
probe function which was missing. Also release timer in remove function.

Cc: Ludovic Desroches <ludovic.desroches@...el.com>
Cc: Chris Ball <chris@...ntf.net>
Cc: Ulf Hansson <ulf.hansson@...aro.org>
Cc: linux-mmc@...r.kernel.org
Signed-off-by: Pramod Gurav <pramod.gurav@...rtplayin.com>
---
 drivers/mmc/host/atmel-mci.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 21a222c..6db1531 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -2373,7 +2373,7 @@ static int __init atmci_probe(struct platform_device *pdev)
 	struct resource			*regs;
 	unsigned int			nr_slots;
 	int				irq;
-	int				ret;
+	int				ret, i;
 
 	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!regs)
@@ -2480,7 +2480,7 @@ static int __init atmci_probe(struct platform_device *pdev)
 		if (!host->buffer) {
 			ret = -ENOMEM;
 			dev_err(&pdev->dev, "buffer allocation failed\n");
-			goto err_init_slot;
+			goto err_dma_alloc;
 		}
 	}
 
@@ -2490,10 +2490,16 @@ static int __init atmci_probe(struct platform_device *pdev)
 
 	return 0;
 
+err_dma_alloc:
+	for (i = 0; i < ATMCI_MAX_NR_SLOTS; i++) {
+		if (host->slot[i])
+			atmci_cleanup_slot(host->slot[i], i);
+	}
+
 err_init_slot:
+	del_timer_sync(&host->timer);
 	if (host->dma.chan)
 		dma_release_channel(host->dma.chan);
-
 	return ret;
 }
 
@@ -2517,6 +2523,7 @@ static int __exit atmci_remove(struct platform_device *pdev)
 	atmci_readl(host, ATMCI_SR);
 	clk_disable_unprepare(host->mck);
 
+	del_timer_sync(&host->timer);
 	if (host->dma.chan)
 		dma_release_channel(host->dma.chan);
 
-- 
1.8.3.2

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