evie/android_kernel_oneplus_msm8998
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drm/msm/sde: fix null pointer dereference

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This change is done to fix null pointer dereference
in sde_core_irq_preinstall().

Change-Id: I448e275e2ce5708738651d1cf7f66329bcf47451
Signed-off-by: Rahul Sharma <rahsha@codeaurora.org>
This commit is contained in:
Rahul Sharma 2019-04-25 17:58:11 +05:30 • committed by Gerrit - the friendly Code Review server
parent 57cc803c86
commit adebb0daf7
1 changed files with 19 additions and 1 deletions
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20
drivers/gpu/drm/msm/sde/sde_core_irq.c
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@ -1,4 +1,4 @@
/* Copyright (c) 2015-2017, The Linux Foundation. All rights reserved.
/* Copyright (c) 2015-2017,2019 The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -388,10 +388,28 @@ void sde_core_irq_preinstall(struct sde_kms *sde_kms)
sde_kms->irq_obj.total_irqs = sde_kms->hw_intr->irq_idx_tbl_size;
sde_kms->irq_obj.irq_cb_tbl = kcalloc(sde_kms->irq_obj.total_irqs,
sizeof(struct list_head), GFP_KERNEL);
if (sde_kms->irq_obj.irq_cb_tbl == NULL) {
SDE_ERROR("Failed to allocate\n");
return;
}
sde_kms->irq_obj.enable_counts = kcalloc(sde_kms->irq_obj.total_irqs,
sizeof(atomic_t), GFP_KERNEL);
if (sde_kms->irq_obj.enable_counts == NULL) {
kfree(sde_kms->irq_obj.irq_cb_tbl);
sde_kms->irq_obj.irq_cb_tbl = NULL;
SDE_ERROR("Failed to allocate\n");
return;
}
sde_kms->irq_obj.irq_counts = kcalloc(sde_kms->irq_obj.total_irqs,
sizeof(atomic_t), GFP_KERNEL);
if (sde_kms->irq_obj.irq_counts == NULL) {
kfree(sde_kms->irq_obj.irq_cb_tbl);
kfree(sde_kms->irq_obj.enable_counts);
sde_kms->irq_obj.irq_cb_tbl = NULL;
sde_kms->irq_obj.enable_counts = NULL;
SDE_ERROR("Failed to allocate\n");
return;
}
for (i = 0; i < sde_kms->irq_obj.total_irqs; i++) {
INIT_LIST_HEAD(&sde_kms->irq_obj.irq_cb_tbl[i]);
atomic_set(&sde_kms->irq_obj.enable_counts[i], 0);