ARM: edma: Convert to devm_* api

Use devm_ioremap_resource instead of reques_mem_region()/ioremap(),
devm_request_irq() instead of request_irq() and kzalloc() calls to
devm_kzalloc().

This ensures more consistent error values and simplifies error paths.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
[nsekhar@ti.com: add missing err.h include]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

1 files changed, 20 insertions, 45 deletions

diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c
index a1db6cd8cf79..7658874cc3d5 100644
--- a/arch/arm/common/edma.c
+++ b/arch/arm/common/edma.c
@@ -17,6 +17,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
+#include <linux/err.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/module.h>
@@ -1382,7 +1383,6 @@ static int __init edma_probe(struct platform_device *pdev)
         int                     irq[EDMA_MAX_CC] = {0, 0};
         int                     err_irq[EDMA_MAX_CC] = {0, 0};
         struct resource         *r[EDMA_MAX_CC] = {NULL};
-        resource_size_t         len[EDMA_MAX_CC];
         char                    res_name[10];
         char                    irq_name[10];
 
@@ -1402,26 +1402,14 @@ static int __init edma_probe(struct platform_device *pdev)
                         found = 1;
                 }
 
-                len[j] = resource_size(r[j]);
+                edmacc_regs_base[j] = devm_ioremap_resource(&pdev->dev, r[j]);
+                if (IS_ERR(edmacc_regs_base[j]))
+                        return PTR_ERR(edmacc_regs_base[j]);
 
-                r[j] = request_mem_region(r[j]->start, len[j],
-                        dev_name(&pdev->dev));
-                if (!r[j]) {
-                        status = -EBUSY;
-                        goto fail1;
-                }
-
-                edmacc_regs_base[j] = ioremap(r[j]->start, len[j]);
-                if (!edmacc_regs_base[j]) {
-                        status = -EBUSY;
-                        goto fail1;
-                }
-
-                edma_cc[j] = kzalloc(sizeof(struct edma), GFP_KERNEL);
-                if (!edma_cc[j]) {
-                        status = -ENOMEM;
-                        goto fail1;
-                }
+                edma_cc[j] = devm_kzalloc(&pdev->dev, sizeof(struct edma),
+                                          GFP_KERNEL);
+                if (!edma_cc[j])
+                        return -ENOMEM;
 
                 edma_cc[j]->num_channels = min_t(unsigned, info[j]->n_channel,
                                                         EDMA_MAX_DMACH);
@@ -1471,23 +1459,27 @@ static int __init edma_probe(struct platform_device *pdev)
                 sprintf(irq_name, "edma%d", j);
                 irq[j] = platform_get_irq_byname(pdev, irq_name);
                 edma_cc[j]->irq_res_start = irq[j];
-                status = request_irq(irq[j], dma_irq_handler, 0, "edma",
-                                        &pdev->dev);
+                status = devm_request_irq(&pdev->dev, irq[j],
+                                          dma_irq_handler, 0, "edma",
+                                          &pdev->dev);
                 if (status < 0) {
-                        dev_dbg(&pdev->dev, "request_irq %d failed --> %d\n",
+                        dev_dbg(&pdev->dev,
+                                "devm_request_irq %d failed --> %d\n",
                                 irq[j], status);
-                        goto fail;
+                        return status;
                 }
 
                 sprintf(irq_name, "edma%d_err", j);
                 err_irq[j] = platform_get_irq_byname(pdev, irq_name);
                 edma_cc[j]->irq_res_end = err_irq[j];
-                status = request_irq(err_irq[j], dma_ccerr_handler, 0,
-                                        "edma_error", &pdev->dev);
+                status = devm_request_irq(&pdev->dev, err_irq[j],
+                                          dma_ccerr_handler, 0,
+                                          "edma_error", &pdev->dev);
                 if (status < 0) {
-                        dev_dbg(&pdev->dev, "request_irq %d failed --> %d\n",
+                        dev_dbg(&pdev->dev,
+                                "devm_request_irq %d failed --> %d\n",
                                 err_irq[j], status);
-                        goto fail;
+                        return status;
                 }
 
                 for (i = 0; i < edma_cc[j]->num_channels; i++)
@@ -1522,23 +1514,6 @@ static int __init edma_probe(struct platform_device *pdev)
         }
 
         return 0;
-
-fail:
-        for (i = 0; i < EDMA_MAX_CC; i++) {
-                if (err_irq[i])
-                        free_irq(err_irq[i], &pdev->dev);
-                if (irq[i])
-                        free_irq(irq[i], &pdev->dev);
-        }
-fail1:
-        for (i = 0; i < EDMA_MAX_CC; i++) {
-                if (r[i])
-                        release_mem_region(r[i]->start, len[i]);
-                if (edmacc_regs_base[i])
-                        iounmap(edmacc_regs_base[i]);
-                kfree(edma_cc[i]);
-        }
-        return status;
 }