5.4-stable review patch. If anyone has any objections, please let me know.
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From: Christophe JAILLET christophe.jaillet@wanadoo.fr
[ Upstream commit 9b5463f349d019a261f1e80803447efca3126151 ]
If i2c_add_adapter() fails, the request_region() call in ali1535_setup() must be undone by a corresponding release_region() call, as done in the remove function.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Christophe JAILLET christophe.jaillet@wanadoo.fr Signed-off-by: Andi Shyti andi.shyti@kernel.org Link: https://lore.kernel.org/r/0daf63d7a2ce74c02e2664ba805bbfadab7d25e5.174103157... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/i2c/busses/i2c-ali1535.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-ali1535.c b/drivers/i2c/busses/i2c-ali1535.c index a43deea390f5a..2e547b03e5c9b 100644 --- a/drivers/i2c/busses/i2c-ali1535.c +++ b/drivers/i2c/busses/i2c-ali1535.c @@ -490,6 +490,8 @@ MODULE_DEVICE_TABLE(pci, ali1535_ids);
static int ali1535_probe(struct pci_dev *dev, const struct pci_device_id *id) { + int ret; + if (ali1535_setup(dev)) { dev_warn(&dev->dev, "ALI1535 not detected, module not inserted.\n"); @@ -501,7 +503,15 @@ static int ali1535_probe(struct pci_dev *dev, const struct pci_device_id *id)
snprintf(ali1535_adapter.name, sizeof(ali1535_adapter.name), "SMBus ALI1535 adapter at %04x", ali1535_offset); - return i2c_add_adapter(&ali1535_adapter); + ret = i2c_add_adapter(&ali1535_adapter); + if (ret) + goto release_region; + + return 0; + +release_region: + release_region(ali1535_smba, ALI1535_SMB_IOSIZE); + return ret; }
static void ali1535_remove(struct pci_dev *dev)