diff options
| author | Jerome Neanne <jneanne@baylibre.com> | 2023-09-05 16:07:34 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-09-05 20:58:41 +0100 |
| commit | ca0e36e3e39a4e8b5a4b647dff8c5938ca6ccbec (patch) | |
| tree | 3f81afbf22854a3eb891c44207d71bb5feee445d | |
| parent | c69290557c7571dff3d995fa27619b965915e8a1 (diff) | |
| download | linux-ca0e36e3e39a4e8b5a4b647dff8c5938ca6ccbec.tar.gz | |
regulator: tps6594-regulator: Fix random kernel crash
Random kernel crash detected in TI CICD when regulator driver is added.
This is root caused to irq index increment being done twice causing
irq_data being allocated outside of the range.
- Rework tps6594_request_reg_irqs with correct index increment
- Adjust irq_data kmalloc size to the exact size needed for the device
This has been reported on TI mainline. No public bug report associated.
Reported-by: Udit Kumar <u-kumar1@ti.com>
Fixes: f17ccc5deb4d ("regulator: tps6594-regulator: Add driver for TI TPS6594 regulators")
Signed-off-by: Jerome Neanne <jneanne@baylibre.com>
Link: https://lore.kernel.org/r/20230828-tps6594_random_boot_crash_fix-v1-1-f29cbf9ddb37@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | drivers/regulator/tps6594-regulator.c | 31 |
1 files changed, 15 insertions, 16 deletions
diff --git a/drivers/regulator/tps6594-regulator.c b/drivers/regulator/tps6594-regulator.c index 25ef102c82707c..b7f0c87797577e 100644 --- a/drivers/regulator/tps6594-regulator.c +++ b/drivers/regulator/tps6594-regulator.c @@ -384,21 +384,19 @@ static int tps6594_request_reg_irqs(struct platform_device *pdev, if (irq < 0) return -EINVAL; - irq_data[*irq_idx + j].dev = tps->dev; - irq_data[*irq_idx + j].type = irq_type; - irq_data[*irq_idx + j].rdev = rdev; + irq_data[*irq_idx].dev = tps->dev; + irq_data[*irq_idx].type = irq_type; + irq_data[*irq_idx].rdev = rdev; error = devm_request_threaded_irq(tps->dev, irq, NULL, - tps6594_regulator_irq_handler, - IRQF_ONESHOT, - irq_type->irq_name, - &irq_data[*irq_idx]); - (*irq_idx)++; + tps6594_regulator_irq_handler, IRQF_ONESHOT, + irq_type->irq_name, &irq_data[*irq_idx]); if (error) { dev_err(tps->dev, "tps6594 failed to request %s IRQ %d: %d\n", irq_type->irq_name, irq, error); return error; } + (*irq_idx)++; } return 0; } @@ -420,8 +418,8 @@ static int tps6594_regulator_probe(struct platform_device *pdev) int error, i, irq, multi, delta; int irq_idx = 0; int buck_idx = 0; - int ext_reg_irq_nb = 2; - + size_t ext_reg_irq_nb = 2; + size_t reg_irq_nb; enum { MULTI_BUCK12, MULTI_BUCK123, @@ -484,15 +482,16 @@ static int tps6594_regulator_probe(struct platform_device *pdev) } } - if (tps->chip_id == LP8764) + if (tps->chip_id == LP8764) { /* There is only 4 buck on LP8764 */ buck_configured[4] = 1; + reg_irq_nb = size_mul(REGS_INT_NB, (BUCK_NB - 1)); + } else { + reg_irq_nb = size_mul(REGS_INT_NB, (size_add(BUCK_NB, LDO_NB))); + } - irq_data = devm_kmalloc_array(tps->dev, - REGS_INT_NB * sizeof(struct tps6594_regulator_irq_data), - ARRAY_SIZE(tps6594_bucks_irq_types) + - ARRAY_SIZE(tps6594_ldos_irq_types), - GFP_KERNEL); + irq_data = devm_kmalloc_array(tps->dev, reg_irq_nb, + sizeof(struct tps6594_regulator_irq_data), GFP_KERNEL); if (!irq_data) return -ENOMEM; |