From: Xiaolei Li <xiaolei.li@mediatek.com>
To: <miquel.raynal@bootlin.com>, <richard@nod.at>
Cc: linux-mediatek@lists.infradead.org, xiaolei.li@mediatek.com,
linux-mtd@lists.infradead.org, srv_heupstream@mediatek.com
Subject: [PATCH v2 3/5] mtd: rawnand: mtk: Add validity check for CE# pin setting
Date: Tue, 30 Apr 2019 18:02:48 +0800 [thread overview]
Message-ID: <20190430100250.28083-4-xiaolei.li@mediatek.com> (raw)
In-Reply-To: <20190430100250.28083-1-xiaolei.li@mediatek.com>
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>
---
drivers/mtd/nand/raw/mtk_nand.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/mtd/nand/raw/mtk_nand.c b/drivers/mtd/nand/raw/mtk_nand.c
index e90c38c6f835..23ebd668bbcd 100644
--- a/drivers/mtd/nand/raw/mtk_nand.c
+++ b/drivers/mtd/nand/raw/mtk_nand.c
@@ -162,6 +162,8 @@ struct mtk_nfc {
struct list_head chips;
u8 *buffer;
+
+ unsigned long assigned_cs;
};
/*
@@ -1367,6 +1369,17 @@ 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;
}
--
2.18.0
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next prev parent reply other threads:[~2019-04-30 10:04 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-30 10:02 [PATCH v2 0/5] MTK NAND driver improvements and fixes Xiaolei Li
2019-04-30 10:02 ` [PATCH v2 1/5] mtd: rawnand: mtk: Correct low level time calculation of r/w cycle Xiaolei Li
2019-04-30 10:32 ` Sasha Levin
2019-05-05 7:06 ` xiaolei li
2019-05-06 8:11 ` Miquel Raynal
2019-04-30 11:59 ` Miquel Raynal
2019-05-05 7:12 ` xiaolei li
2019-04-30 10:02 ` [PATCH v2 2/5] mtd: rawnand: mtk: Improve data sampling timing for read cycle Xiaolei Li
2019-04-30 12:11 ` Miquel Raynal
2019-05-05 7:29 ` xiaolei li
2019-04-30 10:02 ` Xiaolei Li [this message]
2019-04-30 10:02 ` [PATCH v2 4/5] mtd: rawnand: mtk: Fix wrongly assigned OOB buffer pointer issue Xiaolei Li
2019-04-30 10:02 ` [PATCH v2 5/5] mtd: rawnand: mtk: Setup empty page threshold correctly Xiaolei Li
2019-04-30 12:17 ` Miquel Raynal
2019-05-05 7:50 ` xiaolei li
2019-04-30 12:08 ` [PATCH v2 0/5] MTK NAND driver improvements and fixes Miquel Raynal
2019-05-05 7:08 ` xiaolei li
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