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[PATCH] char: mxser_new, check request_region retvals

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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>
This commit is contained in:
Jiri Slaby 2006-12-08 02:38:17 -08:00 committed by Linus Torvalds
parent 596280156a
commit 7a7a5c3303
1 changed files with 17 additions and 4 deletions
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21
drivers/char/mxser_new.c
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@ -622,19 +622,24 @@ static int __init mxser_get_PCI_conf(int board_type, struct mxser_board *brd,
{
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 @@ static int __init mxser_get_PCI_conf(int board_type, struct mxser_board *brd,
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 @@ static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
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;
}