Re: [PATCH 1/3] mtd: rawnand: meson: Fix a limit test in meson_nfc_select_chip()

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Hi Dan,

On 2019/2/1 16:29, Dan Carpenter wrote:
This test is off by one because the > should be >= and it's also testing
against the wrong limit.  The MAX_CE_NUM is the maximum size that
meson_chip->sels[] is allowed to be but meson_chip->nsels is the actual
size.

Fixes: 2d570b34b41a ("mtd: rawnand: meson: add support for Amlogic NAND flash controller ")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
  drivers/mtd/nand/raw/meson_nand.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c
index e858d58d97b0..94c90be7e1e0 100644
--- a/drivers/mtd/nand/raw/meson_nand.c
+++ b/drivers/mtd/nand/raw/meson_nand.c
@@ -225,7 +225,7 @@ static void meson_nfc_select_chip(struct nand_chip *nand, int chip)
  	struct meson_nfc *nfc = nand_get_controller_data(nand);
  	int ret, value;
- if (chip < 0 || WARN_ON_ONCE(chip > MAX_CE_NUM))
+	if (chip < 0 || WARN_ON_ONCE(chip >= meson_chip->nsels))
  		return;
Thank you.

Acked-by: Liang Yang <liang.yang@xxxxxxxxxxx>

  	nfc->param.chip_select = meson_chip->sels[chip] ? NAND_CE1 : NAND_CE0;




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