[PATCH 16/18] fsmc/nand: Use dev_err to report error scenario

[Vipin Kumar]

fsmc controller takes time to calculate the bch8 codes and the error offsets.
The calculate logic checks for completion upto a timeout. This patch adds a
error print when this timer expires and the ecc or error offsets are not yet
calculated.

Signed-off-by: Vipin Kumar <vipin.kumar at st.com>
Reviewed-by: Viresh Kumar <viresh.kumar at st.com>
---
 drivers/mtd/nand/fsmc_nand.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c
index 08aa93e..1f00b37 100644
--- a/drivers/mtd/nand/fsmc_nand.c
+++ b/drivers/mtd/nand/fsmc_nand.c
@@ -464,6 +464,7 @@ struct fsmc_nand_data {
 
 	struct fsmc_eccplace	*ecc_place;
 	unsigned int		bank;
+	struct device		*dev;
 	struct clk		*clk;
 
 	struct fsmc_nand_timings *dev_timings;
@@ -625,6 +626,11 @@ static int fsmc_read_hwecc_ecc4(struct mtd_info *mtd, const uint8_t *data,
 			cond_resched();
 	} while (!time_after_eq(jiffies, deadline));
 
+	if (time_after_eq(jiffies, deadline)) {
+		dev_err(host->dev, "calculate ecc timed out\n");
+		return -ETIMEDOUT;
+	}
+
 	ecc_tmp = readl(&regs->bank_regs[bank].ecc1);
 	ecc[0] = (uint8_t) (ecc_tmp >> 0);
 	ecc[1] = (uint8_t) (ecc_tmp >> 8);
@@ -961,6 +967,7 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
 
 	host->bank = pdata->bank;
 	host->select_chip = pdata->select_bank;
+	host->dev = &pdev->dev;
 	host->dev_timings = pdata->nand_timings;
 	regs = host->regs_va;
 
-- 
1.7.0.4