This is a note to let you know that I've just added the patch titled

mtd: spi-nor: stm32-quadspi: Fix uninitialized error return code

to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: mtd-spi-nor-stm32-quadspi-fix-uninitialized-error-return-code.patch and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Mon Dec 18 13:28:59 CET 2017

From: Geert Uytterhoeven geert@linux-m68k.org Date: Thu, 26 Oct 2017 17:12:33 +0200 Subject: mtd: spi-nor: stm32-quadspi: Fix uninitialized error return code

From: Geert Uytterhoeven geert@linux-m68k.org

[ Upstream commit 05521bd3d117704a1458eb4d0c3ae821858658f2 ]

With gcc 4.1.2:

drivers/mtd/spi-nor/stm32-quadspi.c: In function ‘stm32_qspi_tx_poll’: drivers/mtd/spi-nor/stm32-quadspi.c:230: warning: ‘ret’ may be used uninitialized in this function

Indeed, if stm32_qspi_cmd.len is zero, ret will be uninitialized. This length is passed from outside the driver using the spi_nor.{read,write}{,_reg}() callbacks.

Several functions in drivers/mtd/spi-nor/spi-nor.c (e.g. write_enable(), write_disable(), and erase_chip()) call spi_nor.write_reg() with a zero length.

Fix this by returning an explicit zero on success.

Fixes: 0d43d7ab277a048c ("mtd: spi-nor: add driver for STM32 quad spi flash controller") Signed-off-by: Geert Uytterhoeven geert@linux-m68k.org Acked-by: Ludovic Barre ludovic.barre@st.com Signed-off-by: Cyrille Pitchen cyrille.pitchen@wedev4u.fr Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mtd/spi-nor/stm32-quadspi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/mtd/spi-nor/stm32-quadspi.c +++ b/drivers/mtd/spi-nor/stm32-quadspi.c @@ -240,12 +240,12 @@ static int stm32_qspi_tx_poll(struct stm STM32_QSPI_FIFO_TIMEOUT_US); if (ret) { dev_err(qspi->dev, "fifo timeout (stat:%#x)\n", sr); - break; + return ret; } tx_fifo(buf++, qspi->io_base + QUADSPI_DR); }

- return ret; + return 0; }

static int stm32_qspi_tx_mm(struct stm32_qspi *qspi,

Patches currently in stable-queue which might be from geert@linux-m68k.org are

queue-4.14/fbdev-controlfb-add-missing-modes-to-fix-out-of-bounds-access.patch queue-4.14/mtd-spi-nor-stm32-quadspi-fix-uninitialized-error-return-code.patch