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| author | Geert Uytterhoeven <geert@linux-m68k.org> | 2017-10-26 17:12:33 +0200 |
|---|---|---|
| committer | Cyrille Pitchen <cyrille.pitchen@wedev4u.fr> | 2017-10-29 18:30:13 +0100 |
| commit | 05521bd3d117704a1458eb4d0c3ae821858658f2 (patch) | |
| tree | ab4910aa18808566e5e29cdc9f228e4df3a1dc7c /drivers/mtd | |
| parent | b8cc0012917d9a1ab1497a38c8675ecc4d9d94f2 (diff) | |
| download | linux-05521bd3d117704a1458eb4d0c3ae821858658f2.tar.bz2 | |
mtd: spi-nor: stm32-quadspi: Fix uninitialized error return code
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>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/spi-nor/stm32-quadspi.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/mtd/spi-nor/stm32-quadspi.c b/drivers/mtd/spi-nor/stm32-quadspi.c index 86c0931543c5..ad6a3e1844cb 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, |