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mtd: atmel_nand: move the sanity check to the beginning of pmecc_enable() 

It is better to do the sanity check for the parameter before any hardware
operation.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Josh Wu 2013-08-07 17:58:11 +08:00 committed by David Woodhouse
parent e09f7f9928
commit 1fad0e8b9a
1 changed files with 4 additions and 4 deletions
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8
drivers/mtd/nand/atmel_nand.c
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@ -905,15 +905,15 @@ static void pmecc_enable(struct atmel_nand_host *host, int ecc_op)
{ {
u32 val; u32 val;
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_RST);
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_DISABLE);
val = pmecc_readl_relaxed(host->ecc, CFG);
if (ecc_op != NAND_ECC_READ && ecc_op != NAND_ECC_WRITE) { if (ecc_op != NAND_ECC_READ && ecc_op != NAND_ECC_WRITE) {
dev_err(host->dev, "atmel_nand: wrong pmecc operation type!"); dev_err(host->dev, "atmel_nand: wrong pmecc operation type!");
return; return;
} }
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_RST);
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_DISABLE);
val = pmecc_readl_relaxed(host->ecc, CFG);
if (ecc_op == NAND_ECC_READ) if (ecc_op == NAND_ECC_READ)
pmecc_writel(host->ecc, CFG, (val & ~PMECC_CFG_WRITE_OP) pmecc_writel(host->ecc, CFG, (val & ~PMECC_CFG_WRITE_OP)
| PMECC_CFG_AUTO_ENABLE); | PMECC_CFG_AUTO_ENABLE);