This is a note to let you know that I've just added the patch titled
drm/msm/dpu: make the irq table size static
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-msm-dpu-make-the-irq-table-size-static.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit fb262d18043641ec56e1fbed5f5d4c4841882074
Author: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Date: Wed Aug 2 13:04:23 2023 +0300
drm/msm/dpu: make the irq table size static
[ Upstream commit 56acb1b620e263d3fed8f11f71bf2ab7ce1cae5b ]
The size of the irq table is static, it has MDP_INTR_MAX * 32 interrupt
entries. Provide the fixed length and drop struct_size() statement.
Reviewed-by: Marijn Suijten <marijn.suijten@xxxxxxxxxxxxxx>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Patchwork: https://patchwork.freedesktop.org/patch/550927/
Link: https://lore.kernel.org/r/20230802100426.4184892-6-dmitry.baryshkov@xxxxxxxxxx
Stable-dep-of: 530f272053a5 ("drm/msm/dpu: Add callback function pointer check before its call")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
index 14d374de30c52..3d6d13407dded 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
@@ -200,10 +200,9 @@ static const struct dpu_intr_reg dpu_intr_set_7xxx[] = {
#define DPU_IRQ_REG(irq_idx) (irq_idx / 32)
#define DPU_IRQ_MASK(irq_idx) (BIT(irq_idx % 32))
-static inline bool dpu_core_irq_is_valid(struct dpu_hw_intr *intr,
- int irq_idx)
+static inline bool dpu_core_irq_is_valid(int irq_idx)
{
- return irq_idx >= 0 && irq_idx < intr->total_irqs;
+ return irq_idx >= 0 && irq_idx < DPU_NUM_IRQS;
}
static inline struct dpu_hw_intr_entry *dpu_core_irq_get_entry(struct dpu_hw_intr *intr,
@@ -305,7 +304,7 @@ static int dpu_hw_intr_enable_irq_locked(struct dpu_hw_intr *intr, int irq_idx)
if (!intr)
return -EINVAL;
- if (!dpu_core_irq_is_valid(intr, irq_idx)) {
+ if (!dpu_core_irq_is_valid(irq_idx)) {
pr_err("invalid IRQ index: [%d]\n", irq_idx);
return -EINVAL;
}
@@ -358,7 +357,7 @@ static int dpu_hw_intr_disable_irq_locked(struct dpu_hw_intr *intr, int irq_idx)
if (!intr)
return -EINVAL;
- if (!dpu_core_irq_is_valid(intr, irq_idx)) {
+ if (!dpu_core_irq_is_valid(irq_idx)) {
pr_err("invalid IRQ index: [%d]\n", irq_idx);
return -EINVAL;
}
@@ -443,7 +442,7 @@ u32 dpu_core_irq_read(struct dpu_kms *dpu_kms, int irq_idx)
if (!intr)
return 0;
- if (!dpu_core_irq_is_valid(intr, irq_idx)) {
+ if (!dpu_core_irq_is_valid(irq_idx)) {
pr_err("invalid IRQ index: [%d]\n", irq_idx);
return 0;
}
@@ -470,13 +469,12 @@ struct dpu_hw_intr *dpu_hw_intr_init(void __iomem *addr,
const struct dpu_mdss_cfg *m)
{
struct dpu_hw_intr *intr;
- int nirq = MDP_INTR_MAX * 32;
unsigned int i;
if (!addr || !m)
return ERR_PTR(-EINVAL);
- intr = kzalloc(struct_size(intr, irq_tbl, nirq), GFP_KERNEL);
+ intr = kzalloc(sizeof(*intr), GFP_KERNEL);
if (!intr)
return ERR_PTR(-ENOMEM);
@@ -487,8 +485,6 @@ struct dpu_hw_intr *dpu_hw_intr_init(void __iomem *addr,
intr->hw.blk_addr = addr + m->mdp[0].base;
- intr->total_irqs = nirq;
-
intr->irq_mask = BIT(MDP_SSPP_TOP0_INTR) |
BIT(MDP_SSPP_TOP0_INTR2) |
BIT(MDP_SSPP_TOP0_HIST_INTR);
@@ -527,7 +523,7 @@ int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms, int irq_idx,
return -EINVAL;
}
- if (!dpu_core_irq_is_valid(dpu_kms->hw_intr, irq_idx)) {
+ if (!dpu_core_irq_is_valid(irq_idx)) {
DPU_ERROR("invalid IRQ index: [%d]\n", irq_idx);
return -EINVAL;
}
@@ -566,7 +562,7 @@ int dpu_core_irq_unregister_callback(struct dpu_kms *dpu_kms, int irq_idx)
unsigned long irq_flags;
int ret;
- if (!dpu_core_irq_is_valid(dpu_kms->hw_intr, irq_idx)) {
+ if (!dpu_core_irq_is_valid(irq_idx)) {
DPU_ERROR("invalid IRQ index: [%d]\n", irq_idx);
return -EINVAL;
}
@@ -601,7 +597,7 @@ static int dpu_debugfs_core_irq_show(struct seq_file *s, void *v)
int i, irq_count;
void *cb;
- for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++) {
+ for (i = 0; i < DPU_NUM_IRQS; i++) {
spin_lock_irqsave(&dpu_kms->hw_intr->irq_lock, irq_flags);
irq_entry = dpu_core_irq_get_entry(dpu_kms->hw_intr, i);
irq_count = atomic_read(&irq_entry->count);
@@ -636,7 +632,7 @@ void dpu_core_irq_preinstall(struct msm_kms *kms)
dpu_disable_all_irqs(dpu_kms);
pm_runtime_put_sync(&dpu_kms->pdev->dev);
- for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++) {
+ for (i = 0; i < DPU_NUM_IRQS; i++) {
irq_entry = dpu_core_irq_get_entry(dpu_kms->hw_intr, i);
atomic_set(&irq_entry->count, 0);
}
@@ -652,7 +648,7 @@ void dpu_core_irq_uninstall(struct msm_kms *kms)
return;
pm_runtime_get_sync(&dpu_kms->pdev->dev);
- for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++) {
+ for (i = 0; i < DPU_NUM_IRQS; i++) {
irq_entry = dpu_core_irq_get_entry(dpu_kms->hw_intr, i);
if (irq_entry->cb)
DPU_ERROR("irq_idx=%d still enabled/registered\n", i);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h
index 391fb268ad903..bb775b6a24327 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h
@@ -38,6 +38,8 @@ enum dpu_hw_intr_reg {
#define DPU_IRQ_IDX(reg_idx, offset) (reg_idx * 32 + offset)
+#define DPU_NUM_IRQS (MDP_INTR_MAX * 32)
+
struct dpu_hw_intr_entry {
void (*cb)(void *arg);
void *arg;
@@ -50,7 +52,6 @@ struct dpu_hw_intr_entry {
* @ops: function pointer mapping for IRQ handling
* @cache_irq_mask: array of IRQ enable masks reg storage created during init
* @save_irq_status: array of IRQ status reg storage created during init
- * @total_irqs: total number of irq_idx mapped in the hw_interrupts
* @irq_lock: spinlock for accessing IRQ resources
* @irq_cb_tbl: array of IRQ callbacks
*/
@@ -58,12 +59,11 @@ struct dpu_hw_intr {
struct dpu_hw_blk_reg_map hw;
u32 cache_irq_mask[MDP_INTR_MAX];
u32 *save_irq_status;
- u32 total_irqs;
spinlock_t irq_lock;
unsigned long irq_mask;
const struct dpu_intr_reg *intr_set;
- struct dpu_hw_intr_entry irq_tbl[];
+ struct dpu_hw_intr_entry irq_tbl[DPU_NUM_IRQS];
};
/**
