[PATCH] char: mxser_new, check request_region retvals
mxser_new, check request_region retvals
Return values of (pci_)request_region should be checked and error should be
returned if something is in bad state.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/char/mxser_new.c b/drivers/char/mxser_new.c
index 4db43f3..5a4c80d 100644
--- a/drivers/char/mxser_new.c
+++ b/drivers/char/mxser_new.c
@@ -622,19 +622,24 @@
{
unsigned int i, j;
unsigned long ioaddress;
+ int retval;
/* io address */
brd->board_type = board_type;
brd->nports = mxser_numports[board_type - 1];
ioaddress = pci_resource_start(pdev, 2);
- pci_request_region(pdev, 2, "mxser(IO)");
+ retval = pci_request_region(pdev, 2, "mxser(IO)");
+ if (retval)
+ goto err;
for (i = 0; i < brd->nports; i++)
brd->ports[i].ioaddr = ioaddress + 8 * i;
/* vector */
ioaddress = pci_resource_start(pdev, 3);
- pci_request_region(pdev, 3, "mxser(vector)");
+ retval = pci_request_region(pdev, 3, "mxser(vector)");
+ if (retval)
+ goto err_relio;
brd->vector = ioaddress;
/* irq */
@@ -674,6 +679,10 @@
brd->ports[i].baud_base = 921600;
}
return 0;
+err_relio:
+ pci_release_region(pdev, 2);
+err:
+ return retval;
}
static int __init mxser_init(void)
@@ -3009,8 +3018,12 @@
brd->nports = 8;
else
brd->nports = 4;
- request_region(brd->ports[0].ioaddr, 8 * brd->nports, "mxser(IO)");
- request_region(brd->vector, 1, "mxser(vector)");
+ if (!request_region(brd->ports[0].ioaddr, 8 * brd->nports, "mxser(IO)"))
+ return MXSER_ERR_IOADDR;
+ if (!request_region(brd->vector, 1, "mxser(vector)")) {
+ release_region(brd->ports[0].ioaddr, 8 * brd->nports);
+ return MXSER_ERR_VECTOR;
+ }
return brd->nports;
}