evie/android_kernel_oneplus_msm8998
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msm: gsi: fix event ring handle in gsi_alloc_channel

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Add a check to event ring handle.

Change-Id: If835e7e610745aeb82d4d0e363ef833d0f8d857a
CRs-Fixed: 1115476
Acked-by: Ady Abraham <adya@qti.qualcomm.com>
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>
This commit is contained in:
Skylar Chang 2017-01-24 10:11:33 -08:00
parent 314869eb56
commit 170979c4fd
1 changed files with 13 additions and 7 deletions
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20
drivers/platform/msm/gsi/gsi.c
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@ -1591,14 +1591,20 @@ int gsi_alloc_channel(struct gsi_chan_props *props, unsigned long dev_hdl,
return -GSI_STATUS_INVALID_PARAMS;
}
if (props->evt_ring_hdl != ~0 &&
atomic_read(&gsi_ctx->evtr[props->evt_ring_hdl].chan_ref_cnt) &&
gsi_ctx->evtr[props->evt_ring_hdl].props.exclusive) {
GSIERR("evt ring=%lu already in exclusive use chan_hdl=%p\n",
props->evt_ring_hdl, chan_hdl);
return -GSI_STATUS_UNSUPPORTED_OP;
}
if (props->evt_ring_hdl != ~0) {
if (props->evt_ring_hdl >= GSI_EVT_RING_MAX) {
GSIERR("invalid evt ring=%lu\n", props->evt_ring_hdl);
return -GSI_STATUS_INVALID_PARAMS;
}
if (atomic_read(
&gsi_ctx->evtr[props->evt_ring_hdl].chan_ref_cnt) &&
gsi_ctx->evtr[props->evt_ring_hdl].props.exclusive) {
GSIERR("evt ring=%lu exclusively used by chan_hdl=%p\n",
props->evt_ring_hdl, chan_hdl);
return -GSI_STATUS_UNSUPPORTED_OP;
}
}
ctx = &gsi_ctx->chan[props->ch_id];
if (ctx->allocated) {