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authorStefani Seibold <stefani@seibold.net>2009-12-21 14:37:29 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-22 14:17:56 -0800
commit9842c38e917636fa7dc6b88aff17a8f1fd7f0cc0 (patch)
tree71d0b52ddc243743046bba9f774beca9febc393a /drivers/char/nozomi.c
parent7acd72eb85f1c7a15e8b5eb554994949241737f1 (diff)
kfifo: fix warn_unused_result
Fix the "ignoring return value of '...', declared with attribute warn_unused_result" compiler warning in several users of the new kfifo API. It removes the __must_check attribute from kfifo_in() and kfifo_in_locked() which must not necessary performed. Fix the allocation bug in the nozomi driver file, by moving out the kfifo_alloc from the interrupt handler into the probe function. Fix the kfifo_out() and kfifo_out_locked() users to handle a unexpected end of fifo. Signed-off-by: Stefani Seibold <stefani@seibold.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/nozomi.c')
-rw-r--r--drivers/char/nozomi.c31
1 files changed, 27 insertions, 4 deletions
diff --git a/drivers/char/nozomi.c b/drivers/char/nozomi.c
index 9ef24342901..7d73cd43034 100644
--- a/drivers/char/nozomi.c
+++ b/drivers/char/nozomi.c
@@ -685,8 +685,6 @@ static int nozomi_read_config_table(struct nozomi *dc)
dump_table(dc);
for (i = PORT_MDM; i < MAX_PORT; i++) {
- kfifo_alloc(&dc->port[i].fifo_ul,
- FIFO_BUFFER_SIZE_UL, GFP_ATOMIC);
memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl));
memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul));
}
@@ -1433,6 +1431,16 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev,
goto err_free_sbuf;
}
+ for (i = PORT_MDM; i < MAX_PORT; i++) {
+ if (kfifo_alloc(&dc->port[i].fifo_ul,
+ FIFO_BUFFER_SIZE_UL, GFP_ATOMIC)) {
+ dev_err(&pdev->dev,
+ "Could not allocate kfifo buffer\n");
+ ret = -ENOMEM;
+ goto err_free_kfifo;
+ }
+ }
+
spin_lock_init(&dc->spin_mutex);
nozomi_setup_private_data(dc);
@@ -1445,7 +1453,7 @@ static int __devinit 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_sbuf;
+ goto err_free_kfifo;
}
DBG1("base_addr: %p", dc->base_addr);
@@ -1464,13 +1472,28 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev,
dc->state = NOZOMI_STATE_ENABLED;
for (i = 0; i < MAX_PORT; i++) {
+ struct device *tty_dev;
+
mutex_init(&dc->port[i].tty_sem);
tty_port_init(&dc->port[i].port);
- tty_register_device(ntty_driver, dc->index_start + i,
+ tty_dev = tty_register_device(ntty_driver, dc->index_start + i,
&pdev->dev);
+
+ if (IS_ERR(tty_dev)) {
+ ret = PTR_ERR(tty_dev);
+ dev_err(&pdev->dev, "Could not allocate tty?\n");
+ goto err_free_tty;
+ }
}
+
return 0;
+err_free_tty:
+ for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
+ tty_unregister_device(ntty_driver, i);
+err_free_kfifo:
+ for (i = 0; i < MAX_PORT; i++)
+ kfifo_free(&dc->port[i].fifo_ul);
err_free_sbuf:
kfree(dc->send_buf);
iounmap(dc->base_addr);