In current driver everytime we memcpy 4 bytes to the dest memory regardless of the remaining length. This patch add checking the remaining length before memcpy. If the length is shorter than 4 bytes, memcpy the actual length of data to the dest memory.
Signed-off-by: Gong Qianyu Qianyu.Gong@freescale.com --- drivers/spi/fsl_qspi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/fsl_qspi.c b/drivers/spi/fsl_qspi.c index 755cc27..b41b226 100644 --- a/drivers/spi/fsl_qspi.c +++ b/drivers/spi/fsl_qspi.c @@ -499,7 +499,10 @@ static void qspi_op_rdid(struct fsl_qspi_priv *priv, u32 *rxbuf, u32 len) if (rbsr_reg & QSPI_RBSR_RDBFL_MASK) { data = qspi_read32(priv->flags, ®s->rbdr[i]); data = qspi_endian_xchg(data); - memcpy(rxbuf, &data, 4); + if (size < 4) + memcpy(rxbuf, &data, size); + else + memcpy(rxbuf, &data, 4); rxbuf++; size -= 4; i++;