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Date: Wed, 12 Oct 2016 18:00:36 +0200
From: Loic Pallardy <loic.pallardy@...com>
To: <bjorn.andersson@...aro.org>, <ohad@...ery.com>,
<lee.jones@...aro.org>
CC: <loic.pallardy@...com>, <linux-remoteproc@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <kernel@...inux.com>
Subject: [PATCH v3 18/20] remoteproc: core: Clean-up resource table sanity checks
As resource table has been verified after just loading,
the different sanity checks done when accessing resources
are no more needed.
Signed-off-by: Loic Pallardy <loic.pallardy@...com>
---
drivers/remoteproc/remoteproc_core.c | 47 ++++++------------------------------
1 file changed, 7 insertions(+), 40 deletions(-)
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 849460e..ee2dc8d 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -50,7 +50,7 @@ static LIST_HEAD(rproc_list);
typedef int (*rproc_handle_resources_t)(struct rproc *rproc,
struct resource_table *table, int len);
typedef int (*rproc_handle_resource_t)(struct rproc *rproc,
- void *, int offset, int avail);
+ void *, int offset);
/* Unique indices for remoteproc devices */
static DEFINE_IDA(rproc_dev_index);
@@ -300,7 +300,6 @@ void rproc_free_vring(struct rproc_vring *rvring)
* rproc_handle_vdev() - handle a vdev fw resource
* @rproc: the remote processor
* @rsc: the vring resource descriptor
- * @avail: size of available data (for sanity checking the image)
*
* This resource entry requests the host to statically register a virtio
* device (vdev), and setup everything needed to support it. It contains
@@ -324,19 +323,12 @@ void rproc_free_vring(struct rproc_vring *rvring)
* Returns 0 on success, or an appropriate error code otherwise
*/
static int rproc_handle_vdev(struct rproc *rproc, struct fw_rsc_vdev *rsc,
- int offset, int avail)
+ int offset)
{
struct device *dev = &rproc->dev;
struct rproc_vdev *rvdev;
int i, ret;
- /* make sure resource isn't truncated */
- if (sizeof(*rsc) + rsc->num_of_vrings * sizeof(struct fw_rsc_vdev_vring)
- + rsc->config_len > avail) {
- dev_err(dev, "vdev rsc is truncated\n");
- return -EINVAL;
- }
-
/* make sure reserved bytes are zeroes */
if (rsc->reserved[0] || rsc->reserved[1]) {
dev_err(dev, "vdev rsc has non zero reserved bytes\n");
@@ -388,7 +380,6 @@ free_rvdev:
* rproc_handle_trace() - handle a shared trace buffer resource
* @rproc: the remote processor
* @rsc: the trace resource descriptor
- * @avail: size of available data (for sanity checking the image)
*
* In case the remote processor dumps trace logs into memory,
* export it via debugfs.
@@ -401,18 +392,13 @@ free_rvdev:
* Returns 0 on success, or an appropriate error code otherwise
*/
static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc,
- int offset, int avail)
+ int offset)
{
struct rproc_mem_entry *trace;
struct device *dev = &rproc->dev;
void *ptr;
char name[15];
- if (sizeof(*rsc) > avail) {
- dev_err(dev, "trace rsc is truncated\n");
- return -EINVAL;
- }
-
/* make sure reserved bytes are zeroes */
if (rsc->reserved) {
dev_err(dev, "trace rsc has non zero reserved bytes\n");
@@ -459,7 +445,6 @@ static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc,
* rproc_handle_devmem() - handle devmem resource entry
* @rproc: remote processor handle
* @rsc: the devmem resource entry
- * @avail: size of available data (for sanity checking the image)
*
* Remote processors commonly need to access certain on-chip peripherals.
*
@@ -481,7 +466,7 @@ static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc,
* are outside those ranges.
*/
static int rproc_handle_devmem(struct rproc *rproc, struct fw_rsc_devmem *rsc,
- int offset, int avail)
+ int offset)
{
struct rproc_mem_entry *mapping;
struct device *dev = &rproc->dev;
@@ -491,11 +476,6 @@ static int rproc_handle_devmem(struct rproc *rproc, struct fw_rsc_devmem *rsc,
if (!rproc->domain)
return -EINVAL;
- if (sizeof(*rsc) > avail) {
- dev_err(dev, "devmem rsc is truncated\n");
- return -EINVAL;
- }
-
/* make sure reserved bytes are zeroes */
if (rsc->reserved) {
dev_err(dev, "devmem rsc has non zero reserved bytes\n");
@@ -537,7 +517,6 @@ out:
* rproc_handle_carveout() - handle phys contig memory allocation requests
* @rproc: rproc handle
* @rsc: the resource entry
- * @avail: size of available data (for image validation)
*
* This function will handle firmware requests for allocation of physically
* contiguous memory regions.
@@ -553,7 +532,7 @@ out:
*/
static int rproc_handle_carveout(struct rproc *rproc,
struct fw_rsc_carveout *rsc,
- int offset, int avail)
+ int offset)
{
struct rproc_mem_entry *carveout, *mapping;
struct device *dev = &rproc->dev;
@@ -561,11 +540,6 @@ static int rproc_handle_carveout(struct rproc *rproc,
void *va;
int ret;
- if (sizeof(*rsc) > avail) {
- dev_err(dev, "carveout rsc is truncated\n");
- return -EINVAL;
- }
-
/* make sure reserved bytes are zeroes */
if (rsc->reserved) {
dev_err(dev, "carveout rsc has non zero reserved bytes\n");
@@ -674,7 +648,7 @@ free_carv:
}
static int rproc_count_vrings(struct rproc *rproc, struct fw_rsc_vdev *rsc,
- int offset, int avail)
+ int offset)
{
/* Summarize the number of notification IDs */
rproc->max_notifyid += rsc->num_of_vrings;
@@ -708,15 +682,8 @@ static int rproc_handle_resources(struct rproc *rproc, int len,
for (i = 0; i < rproc->table_ptr->num; i++) {
int offset = rproc->table_ptr->offset[i];
struct fw_rsc_hdr *hdr = (void *)rproc->table_ptr + offset;
- int avail = len - offset - sizeof(*hdr);
void *rsc = (void *)hdr + sizeof(*hdr);
- /* make sure table isn't truncated */
- if (avail < 0) {
- dev_err(dev, "rsc table is truncated\n");
- return -EINVAL;
- }
-
dev_dbg(dev, "rsc: type %d\n", hdr->type);
if (hdr->type >= RSC_LAST) {
@@ -728,7 +695,7 @@ static int rproc_handle_resources(struct rproc *rproc, int len,
if (!handler)
continue;
- ret = handler(rproc, rsc, offset + sizeof(*hdr), avail);
+ ret = handler(rproc, rsc, offset + sizeof(*hdr));
if (ret)
break;
}
--
1.9.1
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