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https://github.com/Divested-Mobile/DivestOS-Build.git
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63 lines
2.3 KiB
Diff
63 lines
2.3 KiB
Diff
From 193813a21453ccc7fb6b04bedf881a6feaaa015f Mon Sep 17 00:00:00 2001
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From: Vasantha Balla <vballa@codeaurora.org>
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Date: Tue, 28 Mar 2017 16:04:06 +0530
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Subject: msm-vidc: Allocate bus vote data during initialization
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Dynamic reallocation of vote_data memory can cause double free
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problem if multiple instances try to reallocate simultaneously.
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So allocate this memory statically.
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Change-Id: Ib5ff08c600a4b69a38b519688bbc153de9f50090
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Signed-off-by: Vasantha Balla<vballa@codeaurora.org>
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---
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drivers/media/platform/msm/vidc/venus_hfi.c | 25 ++++++++++++++-----------
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1 file changed, 14 insertions(+), 11 deletions(-)
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diff --git a/drivers/media/platform/msm/vidc/venus_hfi.c b/drivers/media/platform/msm/vidc/venus_hfi.c
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index 4df4f35..8b98c41d 100644
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--- a/drivers/media/platform/msm/vidc/venus_hfi.c
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+++ b/drivers/media/platform/msm/vidc/venus_hfi.c
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@@ -929,15 +929,12 @@ static int venus_hfi_vote_active_buses(void *dev,
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return -EINVAL;
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}
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- /* (Re-)alloc memory to store the new votes (in case we internally
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- * re-vote after power collapse, which is transparent to client) */
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- cached_vote_data = krealloc(device->bus_load.vote_data, num_data *
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- sizeof(*cached_vote_data), GFP_KERNEL);
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- if (!cached_vote_data) {
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- dprintk(VIDC_ERR, "Can't alloc memory to cache bus votes\n");
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- rc = -ENOMEM;
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- goto err_no_mem;
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- }
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+ cached_vote_data = device->bus_load.vote_data;
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+ if (!cached_vote_data) {
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+ dprintk(VIDC_ERR,"Invalid bus load vote data\n");
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+ rc = -ENOMEM;
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+ goto err_no_mem;
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+ }
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/* Alloc & init the load table */
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num_bus = device->res->bus_set.count;
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@@ -3746,9 +3743,15 @@ static int venus_hfi_init_bus(struct venus_hfi_device *device)
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dprintk(VIDC_DBG, "Registered bus client %s\n", name);
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}
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- device->bus_load.vote_data = NULL;
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- device->bus_load.vote_data_count = 0;
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+ device->bus_load.vote_data = (struct vidc_bus_vote_data *)
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+ kzalloc(sizeof(struct vidc_bus_vote_data)*MAX_SUPPORTED_INSTANCES_COUNT, GFP_KERNEL);
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+ if (device->bus_load.vote_data == NULL) {
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+ dprintk(VIDC_ERR,"Failed to allocate memory for vote_data\n");
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+ rc = -ENOMEM;
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+ goto err_init_bus;
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+ }
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+ device->bus_load.vote_data_count = 0;
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return rc;
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err_init_bus:
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venus_hfi_deinit_bus(device);
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--
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cgit v1.1
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