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remoteproc: Keep local copy of firmware name 

Storage of the firmware name was inconsistent, either storing a pointer
to a name stored with unknown ownership, or a variable length tacked
onto the end of the struct proc allocated in rproc_alloc.

In preparation for allowing the firmware of an already allocated struct
rproc to be changed, instead always keep a locally maintained copy of
the firmware name.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Matt Redfearn 2016-10-17 16:48:58 +01:00 committed by Bjorn Andersson
parent 1001354ca3
commit 0f57dc6ae1
2 changed files with 17 additions and 16 deletions
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31
drivers/remoteproc/remoteproc_core.c
View File

@ -1273,6 +1273,7 @@ static void rproc_type_release(struct device *dev)
if (rproc->index >= 0)
ida_simple_remove(&rproc_dev_index, rproc->index);
kfree(rproc->firmware);
kfree(rproc);
}
@ -1310,31 +1311,31 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
{
struct rproc *rproc;
char *p, *template = "rproc-%s-fw";
int name_len = 0;
int name_len;
if (!dev || !name || !ops)
return NULL;
if (!firmware)
if (!firmware) {
/*
* Make room for default firmware name (minus %s plus '\0').
* If the caller didn't pass in a firmware name then
* construct a default name. We're already glomming 'len'
* bytes onto the end of the struct rproc allocation, so do
* a few more for the default firmware name (but only if
* the caller doesn't pass one).
* construct a default name.
*/
name_len = strlen(name) + strlen(template) - 2 + 1;
rproc = kzalloc(sizeof(*rproc) + len + name_len, GFP_KERNEL);
if (!rproc)
return NULL;
if (!firmware) {
p = (char *)rproc + sizeof(struct rproc) + len;
p = kmalloc(name_len, GFP_KERNEL);
if (!p)
return NULL;
snprintf(p, name_len, template, name);
} else {
p = (char *)firmware;
p = kstrdup(firmware, GFP_KERNEL);
if (!p)
return NULL;
}
rproc = kzalloc(sizeof(struct rproc) + len, GFP_KERNEL);
if (!rproc) {
kfree(p);
return NULL;
}
rproc->firmware = p;

2
include/linux/remoteproc.h
View File

@ -415,7 +415,7 @@ struct rproc {
struct list_head node;
struct iommu_domain *domain;
const char *name;
const char *firmware;
char *firmware;
void *priv;
const struct rproc_ops *ops;
struct device dev;