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spi: Always check complete callback before calling it

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Since commit 1e25cd4729 "spi: Do not require a completion", this checking is
required to prevent NULL pointer dereference.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Axel Lin 2014-04-02 22:21:04 +08:00 committed by Mark Brown
parent 455c6fdbd2
commit 0a6d38795a
7 changed files with 18 additions and 9 deletions
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3
drivers/spi/spi-fsl-espi.c
View File

@ -446,7 +446,8 @@ static void fsl_espi_do_one_msg(struct spi_message *m)
m->actual_length = espi_trans.actual_length;
m->status = espi_trans.status;
m->complete(m->context);
if (m->complete)
m->complete(m->context);
}
static int fsl_espi_setup(struct spi_device *spi)

3
drivers/spi/spi-fsl-spi.c
View File

@ -404,7 +404,8 @@ static void fsl_spi_do_one_msg(struct spi_message *m)
}
m->status = status;
m->complete(m->context);
if (m->complete)
m->complete(m->context);
if (status || !cs_change) {
ndelay(nsecs);

3
drivers/spi/spi-mpc512x-psc.c
View File

@ -301,7 +301,8 @@ static int mpc512x_psc_spi_msg_xfer(struct spi_master *master,
}
m->status = status;
m->complete(m->context);
if (m->complete)
m->complete(m->context);
if (status || !cs_change)
mpc512x_psc_spi_deactivate_cs(spi);

3
drivers/spi/spi-mpc52xx-psc.c
View File

@ -248,7 +248,8 @@ static void mpc52xx_psc_spi_work(struct work_struct *work)
}
m->status = status;
m->complete(m->context);
if (m->complete)
m->complete(m->context);
if (status || !cs_change)
mpc52xx_psc_spi_deactivate_cs(spi);

6
drivers/spi/spi-mpc52xx.c
View File

@ -235,7 +235,8 @@ static int mpc52xx_spi_fsmstate_transfer(int irq, struct mpc52xx_spi *ms,
dev_err(&ms->master->dev, "mode fault\n");
mpc52xx_spi_chipsel(ms, 0);
ms->message->status = -EIO;
ms->message->complete(ms->message->context);
if (ms->message->complete)
ms->message->complete(ms->message->context);
ms->state = mpc52xx_spi_fsmstate_idle;
return FSM_CONTINUE;
}
@ -289,7 +290,8 @@ mpc52xx_spi_fsmstate_wait(int irq, struct mpc52xx_spi *ms, u8 status, u8 data)
ms->msg_count++;
mpc52xx_spi_chipsel(ms, 0);
ms->message->status = 0;
ms->message->complete(ms->message->context);
if (ms->message->complete)
ms->message->complete(ms->message->context);
ms->state = mpc52xx_spi_fsmstate_idle;
return FSM_CONTINUE;
}

6
drivers/spi/spi-sh.c
View File

@ -322,7 +322,8 @@ static void spi_sh_work(struct work_struct *work)
spin_lock_irqsave(&ss->lock, flags);
mesg->status = 0;
mesg->complete(mesg->context);
if (mesg->complete)
mesg->complete(mesg->context);
}
clear_fifo(ss);
@ -340,7 +341,8 @@ static void spi_sh_work(struct work_struct *work)
error:
mesg->status = ret;
mesg->complete(mesg->context);
if (mesg->complete)
mesg->complete(mesg->context);
spi_sh_clear_bit(ss, SPI_SH_SSA | SPI_SH_SSDB | SPI_SH_SSD,
SPI_SH_CR1);

3
drivers/spi/spi-txx9.c
View File

@ -265,7 +265,8 @@ static void txx9spi_work_one(struct txx9spi *c, struct spi_message *m)
exit:
m->status = status;
m->complete(m->context);
if (m->complete)
m->complete(m->context);
/* normally deactivate chipselect ... unless no error and
* cs_change has hinted that the next message will probably