Messages in this thread |  | | Subject | Re: [PATCH v2 1/3] mtd: spi-nor: stm32-quadspi: Fix uninitialized error return code | From | Cyrille Pitchen <> | Date | Sun, 29 Oct 2017 18:50:46 +0100 |
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Hi Ludovic,
Le 26/10/2017 à 17:12, Ludovic Barre a écrit : > From: Geert Uytterhoeven <geert@linux-m68k.org> > > 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: Ludovic Barre <ludovic.barre@st.com> I removed your "Signed-off" because I think this is a mistake but kept your "Acked-by" tag.
Applied to the spi-nor/next branch of l2-mtd.
Thanks!
> --- > drivers/mtd/spi-nor/stm32-quadspi.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/mtd/spi-nor/stm32-quadspi.c b/drivers/mtd/spi-nor/stm32-quadspi.c > index 86c0931..ad6a3e1 100644 > --- 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 stm32_qspi *qspi, > 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, >
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