diff options
| author | Xiaolei Li <xiaolei.li@mediatek.com> | 2019-05-07 18:25:40 +0800 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2019-06-27 20:05:25 +0200 |
| commit | 8dbd7b103fc3eac53ab8a20b3cd1a5cb26c0dcbb (patch) | |
| tree | 88ba4cf4675f9f2be20d421e4e252b2a41e8ca5e /drivers/mtd/nand/raw/mtk_nand.c | |
| parent | 42d13a09efa4f0ea33231f3b145356ee487987b3 (diff) | |
| download | linux-8dbd7b103fc3eac53ab8a20b3cd1a5cb26c0dcbb.tar.bz2 | |
mtd: rawnand: mtk: Add validity check for CE# pin setting
Currently, we only check how many CE# pins are set in device tree.
But it should be necessary to check whether CE# pin setting is
duplicated or if CE# pin index exceeds the maximum CE# number that
controller supports.
So, add validity check to avoid these invalid settings.
Signed-off-by: Xiaolei Li <xiaolei.li@mediatek.com>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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; } |