diff options
Diffstat (limited to 'drivers/mtd/nand/raw/mtk_nand.c')
| -rw-r--r-- | drivers/mtd/nand/raw/mtk_nand.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/mtd/nand/raw/mtk_nand.c b/drivers/mtd/nand/raw/mtk_nand.c index 03aff7e9bea5..d3f00d628fa6 100644 --- a/drivers/mtd/nand/raw/mtk_nand.c +++ b/drivers/mtd/nand/raw/mtk_nand.c @@ -154,6 +154,8 @@ struct mtk_nfc { struct list_head chips; u8 *buffer; + + unsigned long assigned_cs; }; /* @@ -1359,6 +1361,17 @@ static int mtk_nfc_nand_chip_init(struct device *dev, struct mtk_nfc *nfc, dev_err(dev, "reg property failure : %d\n", ret); return ret; } + + if (tmp >= MTK_NAND_MAX_NSELS) { + dev_err(dev, "invalid CS: %u\n", tmp); + return -EINVAL; + } + + if (test_and_set_bit(tmp, &nfc->assigned_cs)) { + dev_err(dev, "CS %u already assigned\n", tmp); + return -EINVAL; + } + chip->sels[i] = tmp; } |