[PATCH] Char: sx, request regions
Check regions if they are free before we touch them. Release them in
failpaths.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/char/sx.c b/drivers/char/sx.c
index 1057cc4..a3008ce 100644
--- a/drivers/char/sx.c
+++ b/drivers/char/sx.c
@@ -2497,10 +2497,13 @@
/* It is safe/allowed to del_timer a non-active timer */
del_timer(&board->timer);
- if (pdev)
+ if (pdev) {
pci_iounmap(pdev, board->base);
- else
+ pci_release_region(pdev, IS_CF_BOARD(board) ? 3 : 2);
+ } else {
iounmap(board->base);
+ release_region(board->hw_base, board->hw_len);
+ }
board->flags &= ~(SX_BOARD_INITIALIZED | SX_BOARD_PRESENT);
}
@@ -2538,8 +2541,17 @@
board->hw_base = ((inb(eisa_slot + 0xc01) << 8) +
inb(eisa_slot + 0xc00)) << 16;
+ board->hw_len = SI2_EISA_WINDOW_LEN;
+ if (!request_region(board->hw_base, board->hw_len, "sx")) {
+ dev_err(dev, "can't request region\n");
+ goto err_flag;
+ }
board->base2 =
board->base = ioremap(board->hw_base, SI2_EISA_WINDOW_LEN);
+ if (!board->base) {
+ dev_err(dev, "can't remap memory\n");
+ goto err_reg;
+ }
sx_dprintk(SX_DEBUG_PROBE, "IO hw_base address: %lx\n", board->hw_base);
sx_dprintk(SX_DEBUG_PROBE, "base: %p\n", board->base);
@@ -2554,6 +2566,9 @@
return 0;
err_unmap:
iounmap(board->base);
+err_reg:
+ release_region(board->hw_base, board->hw_len);
+err_flag:
board->flags &= ~SX_BOARD_PRESENT;
err:
return retval;
@@ -2645,12 +2660,17 @@
/* CF boards use base address 3.... */
reg = IS_CF_BOARD(board) ? 3 : 2;
+ retval = pci_request_region(pdev, reg, "sx");
+ if (retval) {
+ dev_err(&pdev->dev, "can't request region\n");
+ goto err_flag;
+ }
board->hw_base = pci_resource_start(pdev, reg);
board->base2 =
board->base = pci_iomap(pdev, reg, WINDOW_LEN(board));
if (!board->base) {
dev_err(&pdev->dev, "ioremap failed\n");
- goto err_flag;
+ goto err_reg;
}
/* Most of the stuff on the CF board is offset by 0x18000 .... */
@@ -2674,6 +2694,8 @@
return 0;
err_unmap:
pci_iounmap(pdev, board->base);
+err_reg:
+ pci_release_region(pdev, reg);
err_flag:
board->flags &= ~SX_BOARD_PRESENT;
err:
@@ -2736,8 +2758,13 @@
for (i = 0; i < NR_SX_ADDRS; i++) {
board = &boards[found];
board->hw_base = sx_probe_addrs[i];
+ board->hw_len = SX_WINDOW_LEN;
+ if (!request_region(board->hw_base, board->hw_len, "sx"))
+ continue;
board->base2 =
- board->base = ioremap(board->hw_base, SX_WINDOW_LEN);
+ board->base = ioremap(board->hw_base, board->hw_len);
+ if (!board->base)
+ goto err_sx_reg;
board->flags &= ~SX_BOARD_TYPE;
board->flags |= SX_ISA_BOARD;
board->irq = sx_irqmask ? -1 : 0;
@@ -2747,14 +2774,21 @@
found++;
} else {
iounmap(board->base);
+err_sx_reg:
+ release_region(board->hw_base, board->hw_len);
}
}
for (i = 0; i < NR_SI_ADDRS; i++) {
board = &boards[found];
board->hw_base = si_probe_addrs[i];
+ board->hw_len = SI2_ISA_WINDOW_LEN;
+ if (!request_region(board->hw_base, board->hw_len, "sx"))
+ continue;
board->base2 =
- board->base = ioremap(board->hw_base, SI2_ISA_WINDOW_LEN);
+ board->base = ioremap(board->hw_base, board->hw_len);
+ if (!board->base)
+ goto err_si_reg;
board->flags &= ~SX_BOARD_TYPE;
board->flags |= SI_ISA_BOARD;
board->irq = sx_irqmask ? -1 : 0;
@@ -2764,13 +2798,20 @@
found++;
} else {
iounmap(board->base);
+err_si_reg:
+ release_region(board->hw_base, board->hw_len);
}
}
for (i = 0; i < NR_SI1_ADDRS; i++) {
board = &boards[found];
board->hw_base = si1_probe_addrs[i];
+ board->hw_len = SI1_ISA_WINDOW_LEN;
+ if (!request_region(board->hw_base, board->hw_len, "sx"))
+ continue;
board->base2 =
- board->base = ioremap(board->hw_base, SI1_ISA_WINDOW_LEN);
+ board->base = ioremap(board->hw_base, board->hw_len);
+ if (!board->base)
+ goto err_si1_reg;
board->flags &= ~SX_BOARD_TYPE;
board->flags |= SI1_ISA_BOARD;
board->irq = sx_irqmask ? -1 : 0;
@@ -2780,6 +2821,8 @@
found++;
} else {
iounmap(board->base);
+err_si1_reg:
+ release_region(board->hw_base, board->hw_len);
}
}
#endif