[MTD] sharpsl_nand: make drvdata non-static

Merge mtd_info and nand_chip info special struct and
make it drvdata instead of plain static variable.

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>

1 files changed, 29 insertions, 24 deletions

diff --git a/drivers/mtd/nand/sharpsl.c b/drivers/mtd/nand/sharpsl.c
index 0a99188a7730..6851806b7015 100644
--- a/drivers/mtd/nand/sharpsl.c
+++ b/drivers/mtd/nand/sharpsl.c
@@ -26,6 +26,11 @@
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
 
+struct sharpsl_nand {
+        struct mtd_info         mtd;
+        struct nand_chip        chip;
+};
+
 static void __iomem *sharpsl_io_base;
 
 /* register offset */
@@ -46,11 +51,6 @@ static void __iomem *sharpsl_io_base;
 #define FLCE0           (1 << 0)
 
 /*
- * MTD structure for SharpSL
- */
-static struct mtd_info *sharpsl_mtd = NULL;
-
-/*
  * Define partitions for flash device
  */
 #define DEFAULT_NUM_PARTITIONS 3
@@ -157,10 +157,11 @@ static int __devinit sharpsl_nand_probe(struct platform_device *pdev)
         struct mtd_partition *sharpsl_partition_info;
         struct resource *r;
         int err = 0;
+        struct sharpsl_nand *sharpsl;
 
         /* Allocate memory for MTD device structure and private data */
-        sharpsl_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL);
-        if (!sharpsl_mtd) {
+        sharpsl = kzalloc(sizeof(struct sharpsl_nand), GFP_KERNEL);
+        if (!sharpsl) {
                 printk("Unable to allocate SharpSL NAND MTD device structure.\n");
                 return -ENOMEM;
         }
@@ -176,20 +177,18 @@ static int __devinit sharpsl_nand_probe(struct platform_device *pdev)
         sharpsl_io_base = ioremap(r->start, resource_size(r));
         if (!sharpsl_io_base) {
                 printk("ioremap to access Sharp SL NAND chip failed\n");
-                kfree(sharpsl_mtd);
-                return -EIO;
+                err = -EIO;
+                goto err_ioremap;
         }
 
         /* Get pointer to private data */
-        this = (struct nand_chip *)(&sharpsl_mtd[1]);
-
-        /* Initialize structures */
-        memset(sharpsl_mtd, 0, sizeof(struct mtd_info));
-        memset(this, 0, sizeof(struct nand_chip));
+        this = (struct nand_chip *)(&sharpsl->chip);
 
         /* Link the private data with the MTD structure */
-        sharpsl_mtd->priv = this;
-        sharpsl_mtd->owner = THIS_MODULE;
+        sharpsl->mtd.priv = this;
+        sharpsl->mtd.owner = THIS_MODULE;
+
+        platform_set_drvdata(pdev, sharpsl);
 
         /*
          * PXA initialize
@@ -218,16 +217,17 @@ static int __devinit sharpsl_nand_probe(struct platform_device *pdev)
         this->ecc.correct = nand_correct_data;
 
         /* Scan to find existence of the device */
-        err = nand_scan(sharpsl_mtd, 1);
+        err = nand_scan(&sharpsl->mtd, 1);
         if (err) {
+                platform_set_drvdata(pdev, NULL);
                 iounmap(sharpsl_io_base);
-                kfree(sharpsl_mtd);
+                kfree(sharpsl);
                 return err;
         }
 
         /* Register the partitions */
-        sharpsl_mtd->name = "sharpsl-nand";
-        nr_partitions = parse_mtd_partitions(sharpsl_mtd, part_probes, &sharpsl_partition_info, 0);
+        sharpsl->mtd.name = "sharpsl-nand";
+        nr_partitions = parse_mtd_partitions(&sharpsl->mtd, part_probes, &sharpsl_partition_info, 0);
 
         if (nr_partitions <= 0) {
                 nr_partitions = DEFAULT_NUM_PARTITIONS;
@@ -247,13 +247,14 @@ static int __devinit sharpsl_nand_probe(struct platform_device *pdev)
                 }
         }
 
-        add_mtd_partitions(sharpsl_mtd, sharpsl_partition_info, nr_partitions);
+        add_mtd_partitions(&sharpsl->mtd, sharpsl_partition_info, nr_partitions);
 
         /* Return happy */
         return 0;
 
+err_ioremap:
 err_get_res:
-        kfree(sharpsl_mtd);
+        kfree(sharpsl);
         return err;
 }
 
@@ -262,13 +263,17 @@ err_get_res:
  */
 static int __devexit sharpsl_nand_remove(struct platform_device *pdev)
 {
+        struct sharpsl_nand *sharpsl = platform_get_drvdata(pdev);
+
         /* Release resources, unregister device */
-        nand_release(sharpsl_mtd);
+        nand_release(&sharpsl->mtd);
+
+        platform_set_drvdata(pdev, NULL);
 
         iounmap(sharpsl_io_base);
 
         /* Free the MTD device structure */
-        kfree(sharpsl_mtd);
+        kfree(sharpsl);
 
         return 0;
 }