The error handling path is broken and we may un-register things that have
never been registered.
Update the loops index accordingly.
Fixes: 9842c38e9176 ("kfifo: fix warn_unused_result")
Suggested-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
---
PORT_MDM is 0, so it does not really matter, but I wonder why one of the
for loop starts at PORT_MDM, while the other one explicitly starts at 0.
We have the same in the remove function, where 0 is used in both cases.
---
drivers/tty/nozomi.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c
index b85d4beabc1f..0c80f25c8c3d 100644
--- a/drivers/tty/nozomi.c
+++ b/drivers/tty/nozomi.c
@@ -1378,7 +1378,7 @@ static int nozomi_card_init(struct pci_dev *pdev,
NOZOMI_NAME, dc);
if (unlikely(ret)) {
dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq);
- goto err_free_kfifo;
+ goto err_free_all_kfifo;
}
DBG1("base_addr: %p", dc->base_addr);
@@ -1416,13 +1416,15 @@ static int nozomi_card_init(struct pci_dev *pdev,
return 0;
err_free_tty:
- for (i = 0; i < MAX_PORT; ++i) {
+ for (i--; i >= 0; i--) {
tty_unregister_device(ntty_driver, dc->index_start + i);
tty_port_destroy(&dc->port[i].port);
}
free_irq(pdev->irq, dc);
+err_free_all_kfifo:
+ i = MAX_PORT;
err_free_kfifo:
- for (i = 0; i < MAX_PORT; i++)
+ for (i--; i >= PORT_MDM; i--)
kfifo_free(&dc->port[i].fifo_ul);
err_free_sbuf:
kfree(dc->send_buf);
--
2.30.2
