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Subject[PATCH v2 4/5] spi: omap2-mcspi: use devm_* functions
Date
The various devm_* functions allocate memory that is released when a driver
detaches. This patch uses devm_request_and_ioremap
to request memory in probe function. Since the freeing is not
needed the calls are deleted from remove function.Also use
use devm_kzalloc for the cs memory allocation.

Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com>
---
drivers/spi/spi-omap2-mcspi.c | 24 ++++--------------------
1 files changed, 4 insertions(+), 20 deletions(-)
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
index 66cbf22..1907ed2 100644
--- a/drivers/spi/spi-omap2-mcspi.c
+++ b/drivers/spi/spi-omap2-mcspi.c
@@ -787,7 +787,7 @@ static int omap2_mcspi_setup(struct spi_device *spi)
mcspi_dma = &mcspi->dma_channels[spi->chip_select];

if (!cs) {
- cs = kzalloc(sizeof *cs, GFP_KERNEL);
+ cs = devm_kzalloc(&spi->dev , sizeof *cs, GFP_KERNEL);
if (!cs)
return -ENOMEM;
cs->base = mcspi->base + spi->chip_select * 0x14;
@@ -828,7 +828,6 @@ static void omap2_mcspi_cleanup(struct spi_device *spi)
cs = spi->controller_state;
list_del(&cs->node);

- kfree(spi->controller_state);
}

if (spi->chip_select < spi->master->num_chipselect) {
@@ -1160,17 +1159,12 @@ static int __devinit omap2_mcspi_probe(struct platform_device *pdev)
r->start += regs_offset;
r->end += regs_offset;
mcspi->phys = r->start;
- if (!request_mem_region(r->start, resource_size(r),
- dev_name(&pdev->dev))) {
- status = -EBUSY;
- goto free_master;
- }

- mcspi->base = ioremap(r->start, resource_size(r));
+ mcspi->base = devm_request_and_ioremap(&pdev->dev, r);
if (!mcspi->base) {
dev_dbg(&pdev->dev, "can't ioremap MCSPI\n");
status = -ENOMEM;
- goto release_region;
+ goto free_master;
}

mcspi->dev = &pdev->dev;
@@ -1185,7 +1179,7 @@ static int __devinit omap2_mcspi_probe(struct platform_device *pdev)
GFP_KERNEL);

if (mcspi->dma_channels == NULL)
- goto unmap_io;
+ goto free_master;

for (i = 0; i < master->num_chipselect; i++) {
char dma_ch_name[14];
@@ -1235,10 +1229,6 @@ disable_pm:
pm_runtime_disable(&pdev->dev);
dma_chnl_free:
kfree(mcspi->dma_channels);
-unmap_io:
- iounmap(mcspi->base);
-release_region:
- release_mem_region(r->start, resource_size(r));
free_master:
kfree(master);
platform_set_drvdata(pdev, NULL);
@@ -1250,8 +1240,6 @@ static int __devexit omap2_mcspi_remove(struct platform_device *pdev)
struct spi_master *master;
struct omap2_mcspi *mcspi;
struct omap2_mcspi_dma *dma_channels;
- struct resource *r;
- void __iomem *base;

master = dev_get_drvdata(&pdev->dev);
mcspi = spi_master_get_devdata(master);
@@ -1259,12 +1247,8 @@ static int __devexit omap2_mcspi_remove(struct platform_device *pdev)

omap2_mcspi_disable_clocks(mcspi);
pm_runtime_disable(&pdev->dev);
- r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(r->start, resource_size(r));

- base = mcspi->base;
spi_unregister_master(master);
- iounmap(base);
kfree(dma_channels);
destroy_workqueue(mcspi->wq);
platform_set_drvdata(pdev, NULL);
--
1.7.1


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