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remoteproc: stm32: fix probe error case

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If the rproc driver is probed before the mailbox driver and if the rproc
Device Tree node has some mailbox properties, the rproc driver probe
shall be deferred instead of being probed without mailbox support.

Tested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Link: https://lore.kernel.org/r/1573812188-19842-1-git-send-email-fabien.dessenne@st.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Fabien Dessenne 2019-11-15 11:03:08 +01:00 committed by Bjorn Andersson
parent 410119ee29
commit 4a56e423e0
1 changed files with 15 additions and 2 deletions
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17
drivers/remoteproc/stm32_rproc.c
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@ -326,11 +326,12 @@ static const struct stm32_mbox stm32_rproc_mbox[MBOX_NB_MBX] = {
}
};
static void stm32_rproc_request_mbox(struct rproc *rproc)
static int stm32_rproc_request_mbox(struct rproc *rproc)
{
struct stm32_rproc *ddata = rproc->priv;
struct device *dev = &rproc->dev;
unsigned int i;
int j;
const unsigned char *name;
struct mbox_client *cl;
@ -345,6 +346,8 @@ static void stm32_rproc_request_mbox(struct rproc *rproc)
ddata->mb[i].chan = mbox_request_channel_byname(cl, name);
if (IS_ERR(ddata->mb[i].chan)) {
if (PTR_ERR(ddata->mb[i].chan) == -EPROBE_DEFER)
goto err_probe;
dev_warn(dev, "cannot get %s mbox\n", name);
ddata->mb[i].chan = NULL;
}
@ -353,6 +356,14 @@ static void stm32_rproc_request_mbox(struct rproc *rproc)
stm32_rproc_mb_vq_work);
}
}
return 0;
err_probe:
for (j = i - 1; j >= 0; j--)
if (ddata->mb[j].chan)
mbox_free_channel(ddata->mb[j].chan);
return -EPROBE_DEFER;
}
static int stm32_rproc_set_hold_boot(struct rproc *rproc, bool hold)
@ -629,7 +640,9 @@ static int stm32_rproc_probe(struct platform_device *pdev)
if (ret)
goto free_wkq;
stm32_rproc_request_mbox(rproc);
ret = stm32_rproc_request_mbox(rproc);
if (ret)
goto free_rproc;
ret = rproc_add(rproc);
if (ret)