linux-kernel - [PATCH 4.19 006/361] mtd: spi-nor: fsl-quadspi: fix read error for flash size larger than 16MB

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Date:   Sun, 11 Nov 2018 14:15:53 -0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Liu Xiang <liu.xiang6@....com.cn>,
        Boris Brezillon <boris.brezillon@...tlin.com>
Subject: [PATCH 4.19 006/361] mtd: spi-nor: fsl-quadspi: fix read error for flash size larger than 16MB

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Liu Xiang <liu.xiang6@....com.cn>

commit 41fe242979e463d6ad251077ded01b825a330b7e upstream.

If the size of spi-nor flash is larger than 16MB, the read_opcode
is set to SPINOR_OP_READ_1_1_4_4B, and fsl_qspi_get_seqid() will
return -EINVAL when cmd is SPINOR_OP_READ_1_1_4_4B. This can
cause read operation fail.

Fixes: e46ecda764dc ("mtd: spi-nor: Add Freescale QuadSPI driver")
Cc: <stable@...r.kernel.org>
Signed-off-by: Liu Xiang <liu.xiang6@....com.cn>
Signed-off-by: Boris Brezillon <boris.brezillon@...tlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/mtd/spi-nor/fsl-quadspi.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/mtd/spi-nor/fsl-quadspi.c
+++ b/drivers/mtd/spi-nor/fsl-quadspi.c
@@ -478,6 +478,7 @@ static int fsl_qspi_get_seqid(struct fsl
 {
 	switch (cmd) {
 	case SPINOR_OP_READ_1_1_4:
+	case SPINOR_OP_READ_1_1_4_4B:
 		return SEQID_READ;
 	case SPINOR_OP_WREN:
 		return SEQID_WREN;