The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 41fe242979e463d6ad251077ded01b825a330b7e Mon Sep 17 00:00:00 2001
From: Liu Xiang liu.xiang6@zte.com.cn Date: Tue, 28 Aug 2018 22:32:57 +0800 Subject: [PATCH] mtd: spi-nor: fsl-quadspi: fix read error for flash size larger than 16MB
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@vger.kernel.org Signed-off-by: Liu Xiang liu.xiang6@zte.com.cn Signed-off-by: Boris Brezillon boris.brezillon@bootlin.com
diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c b/drivers/mtd/spi-nor/fsl-quadspi.c index d1ace310e7c1..1ff3430f82c8 100644 --- 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_qspi *q, u8 cmd) { 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;