mtd: nand/fsmc: Use devm routines
fsmc_nand driver currently uses normal kzalloc, request_mem etc routines. This
patch replaces these routines with devm_kzalloc and devm_request_mem_region etc.
Consequently, the error and driver removal scenarios are curtailed.
Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Reviewed-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c
index e7ae63a..56b6619 100644
--- a/drivers/mtd/nand/fsmc_nand.c
+++ b/drivers/mtd/nand/fsmc_nand.c
@@ -298,11 +298,6 @@
unsigned int bank;
struct clk *clk;
- struct resource *resregs;
- struct resource *rescmd;
- struct resource *resaddr;
- struct resource *resdata;
-
struct fsmc_nand_timings *dev_timings;
void __iomem *data_va;
@@ -706,88 +701,81 @@
}
/* Allocate memory for the device structure (and zero it) */
- host = kzalloc(sizeof(*host), GFP_KERNEL);
+ host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
if (!host) {
dev_err(&pdev->dev, "failed to allocate device structure\n");
return -ENOMEM;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_data");
- if (!res) {
- ret = -EIO;
- goto err_probe1;
+ if (!res)
+ return -EINVAL;
+
+ if (!devm_request_mem_region(&pdev->dev, res->start, resource_size(res),
+ pdev->name)) {
+ dev_err(&pdev->dev, "Failed to get memory data resourse\n");
+ return -ENOENT;
}
- host->resdata = request_mem_region(res->start, resource_size(res),
- pdev->name);
- if (!host->resdata) {
- ret = -EIO;
- goto err_probe1;
- }
-
- host->data_va = ioremap(res->start, resource_size(res));
+ host->data_va = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
if (!host->data_va) {
- ret = -EIO;
- goto err_probe1;
+ dev_err(&pdev->dev, "data ioremap failed\n");
+ return -ENOMEM;
}
- host->resaddr = request_mem_region(res->start + pdata->ale_off,
- resource_size(res), pdev->name);
- if (!host->resaddr) {
- ret = -EIO;
- goto err_probe1;
+ if (!devm_request_mem_region(&pdev->dev, res->start + pdata->ale_off,
+ resource_size(res), pdev->name)) {
+ dev_err(&pdev->dev, "Failed to get memory ale resourse\n");
+ return -ENOENT;
}
- host->addr_va = ioremap(res->start + pdata->ale_off,
+ host->addr_va = devm_ioremap(&pdev->dev, res->start + pdata->ale_off,
resource_size(res));
if (!host->addr_va) {
- ret = -EIO;
- goto err_probe1;
+ dev_err(&pdev->dev, "ale ioremap failed\n");
+ return -ENOMEM;
}
- host->rescmd = request_mem_region(res->start + pdata->cle_off,
- resource_size(res), pdev->name);
- if (!host->rescmd) {
- ret = -EIO;
- goto err_probe1;
+ if (!devm_request_mem_region(&pdev->dev, res->start + pdata->cle_off,
+ resource_size(res), pdev->name)) {
+ dev_err(&pdev->dev, "Failed to get memory cle resourse\n");
+ return -ENOENT;
}
- host->cmd_va = ioremap(res->start + pdata->cle_off, resource_size(res));
+ host->cmd_va = devm_ioremap(&pdev->dev, res->start + pdata->cle_off,
+ resource_size(res));
if (!host->cmd_va) {
- ret = -EIO;
- goto err_probe1;
+ dev_err(&pdev->dev, "ale ioremap failed\n");
+ return -ENOMEM;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fsmc_regs");
- if (!res) {
- ret = -EIO;
- goto err_probe1;
+ if (!res)
+ return -EINVAL;
+
+ if (!devm_request_mem_region(&pdev->dev, res->start, resource_size(res),
+ pdev->name)) {
+ dev_err(&pdev->dev, "Failed to get memory regs resourse\n");
+ return -ENOENT;
}
- host->resregs = request_mem_region(res->start, resource_size(res),
- pdev->name);
- if (!host->resregs) {
- ret = -EIO;
- goto err_probe1;
- }
-
- host->regs_va = ioremap(res->start, resource_size(res));
+ host->regs_va = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
if (!host->regs_va) {
- ret = -EIO;
- goto err_probe1;
+ dev_err(&pdev->dev, "regs ioremap failed\n");
+ return -ENOMEM;
}
host->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(host->clk)) {
dev_err(&pdev->dev, "failed to fetch block clock\n");
- ret = PTR_ERR(host->clk);
- host->clk = NULL;
- goto err_probe1;
+ return PTR_ERR(host->clk);
}
ret = clk_enable(host->clk);
if (ret)
- goto err_probe1;
+ goto err_clk_enable;
/*
* This device ID is actually a common AMBA ID as used on the
@@ -852,7 +840,7 @@
if (nand_scan_ident(&host->mtd, 1, NULL)) {
ret = -ENXIO;
dev_err(&pdev->dev, "No NAND Device found!\n");
- goto err_probe;
+ goto err_scan_ident;
}
if (AMBA_REV_BITS(host->pid) >= 8) {
@@ -927,32 +915,10 @@
return 0;
err_probe:
+err_scan_ident:
clk_disable(host->clk);
-err_probe1:
- if (host->clk)
- clk_put(host->clk);
- if (host->regs_va)
- iounmap(host->regs_va);
- if (host->resregs)
- release_mem_region(host->resregs->start,
- resource_size(host->resregs));
- if (host->cmd_va)
- iounmap(host->cmd_va);
- if (host->rescmd)
- release_mem_region(host->rescmd->start,
- resource_size(host->rescmd));
- if (host->addr_va)
- iounmap(host->addr_va);
- if (host->resaddr)
- release_mem_region(host->resaddr->start,
- resource_size(host->resaddr));
- if (host->data_va)
- iounmap(host->data_va);
- if (host->resdata)
- release_mem_region(host->resdata->start,
- resource_size(host->resdata));
-
- kfree(host);
+err_clk_enable:
+ clk_put(host->clk);
return ret;
}
@@ -969,22 +935,8 @@
nand_release(&host->mtd);
clk_disable(host->clk);
clk_put(host->clk);
-
- iounmap(host->regs_va);
- release_mem_region(host->resregs->start,
- resource_size(host->resregs));
- iounmap(host->cmd_va);
- release_mem_region(host->rescmd->start,
- resource_size(host->rescmd));
- iounmap(host->addr_va);
- release_mem_region(host->resaddr->start,
- resource_size(host->resaddr));
- iounmap(host->data_va);
- release_mem_region(host->resdata->start,
- resource_size(host->resdata));
-
- kfree(host);
}
+
return 0;
}