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path: root/drivers/mfd/twl4030-irq.c
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Diffstat (limited to 'drivers/mfd/twl4030-irq.c')
-rw-r--r--drivers/mfd/twl4030-irq.c30
1 files changed, 26 insertions, 4 deletions
diff --git a/drivers/mfd/twl4030-irq.c b/drivers/mfd/twl4030-irq.c
index fae868a8d499..b10876036983 100644
--- a/drivers/mfd/twl4030-irq.c
+++ b/drivers/mfd/twl4030-irq.c
@@ -180,10 +180,15 @@ static struct completion irq_event;
180static int twl4030_irq_thread(void *data) 180static int twl4030_irq_thread(void *data)
181{ 181{
182 long irq = (long)data; 182 long irq = (long)data;
183 irq_desc_t *desc = irq_desc + irq; 183 struct irq_desc *desc = irq_to_desc(irq);
184 static unsigned i2c_errors; 184 static unsigned i2c_errors;
185 const static unsigned max_i2c_errors = 100; 185 const static unsigned max_i2c_errors = 100;
186 186
187 if (!desc) {
188 pr_err("twl4030: Invalid IRQ: %ld\n", irq);
189 return -EINVAL;
190 }
191
187 current->flags |= PF_NOFREEZE; 192 current->flags |= PF_NOFREEZE;
188 193
189 while (!kthread_should_stop()) { 194 while (!kthread_should_stop()) {
@@ -215,7 +220,13 @@ static int twl4030_irq_thread(void *data)
215 pih_isr; 220 pih_isr;
216 pih_isr >>= 1, module_irq++) { 221 pih_isr >>= 1, module_irq++) {
217 if (pih_isr & 0x1) { 222 if (pih_isr & 0x1) {
218 irq_desc_t *d = irq_desc + module_irq; 223 struct irq_desc *d = irq_to_desc(module_irq);
224
225 if (!d) {
226 pr_err("twl4030: Invalid SIH IRQ: %d\n",
227 module_irq);
228 return -EINVAL;
229 }
219 230
220 /* These can't be masked ... always warn 231 /* These can't be masked ... always warn
221 * if we get any surprises. 232 * if we get any surprises.
@@ -452,10 +463,16 @@ static void twl4030_sih_do_edge(struct work_struct *work)
452 /* Modify only the bits we know must change */ 463 /* Modify only the bits we know must change */
453 while (edge_change) { 464 while (edge_change) {
454 int i = fls(edge_change) - 1; 465 int i = fls(edge_change) - 1;
455 struct irq_desc *d = irq_desc + i + agent->irq_base; 466 struct irq_desc *d = irq_to_desc(i + agent->irq_base);
456 int byte = 1 + (i >> 2); 467 int byte = 1 + (i >> 2);
457 int off = (i & 0x3) * 2; 468 int off = (i & 0x3) * 2;
458 469
470 if (!d) {
471 pr_err("twl4030: Invalid IRQ: %d\n",
472 i + agent->irq_base);
473 return;
474 }
475
459 bytes[byte] &= ~(0x03 << off); 476 bytes[byte] &= ~(0x03 << off);
460 477
461 spin_lock_irq(&d->lock); 478 spin_lock_irq(&d->lock);
@@ -512,9 +529,14 @@ static void twl4030_sih_unmask(unsigned irq)
512static int twl4030_sih_set_type(unsigned irq, unsigned trigger) 529static int twl4030_sih_set_type(unsigned irq, unsigned trigger)
513{ 530{
514 struct sih_agent *sih = get_irq_chip_data(irq); 531 struct sih_agent *sih = get_irq_chip_data(irq);
515 struct irq_desc *desc = irq_desc + irq; 532 struct irq_desc *desc = irq_to_desc(irq);
516 unsigned long flags; 533 unsigned long flags;
517 534
535 if (!desc) {
536 pr_err("twl4030: Invalid IRQ: %d\n", irq);
537 return -EINVAL;
538 }
539
518 if (trigger & ~(IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)) 540 if (trigger & ~(IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
519 return -EINVAL; 541 return -EINVAL;
520 542