4.18-stable review patch. If anyone has any objections, please let me know.
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From: Boris Brezillon boris.brezillon@bootlin.com
commit 79e1ca37cc0c056f224cc1dd4a301b9dc2f94167 upstream.
chip->read_buf is left unassigned since commit 4da712e70294 ("mtd: nand: fsmc: use ->exec_op()"), leading to a NULL pointer dereference when it's called from fsmc_read_page_hwecc(). Fix that by using the appropriate helper to read data out of the NAND.
Fixes: 4da712e70294 ("mtd: nand: fsmc: use ->exec_op()") Cc: stable@vger.kernel.org Signed-off-by: Boris Brezillon boris.brezillon@bootlin.com Signed-off-by: Miquel Raynal miquel.raynal@bootlin.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/mtd/nand/raw/fsmc_nand.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/mtd/nand/raw/fsmc_nand.c +++ b/drivers/mtd/nand/raw/fsmc_nand.c @@ -740,7 +740,7 @@ static int fsmc_read_page_hwecc(struct m for (i = 0, s = 0; s < eccsteps; s++, i += eccbytes, p += eccsize) { nand_read_page_op(chip, page, s * eccsize, NULL, 0); chip->ecc.hwctl(mtd, NAND_ECC_READ); - chip->read_buf(mtd, p, eccsize); + nand_read_data_op(chip, p, eccsize, false);
for (j = 0; j < eccbytes;) { struct mtd_oob_region oobregion;