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| author | Jiri Slaby <jirislaby@gmail.com> | 2006-10-21 10:24:01 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-21 13:35:05 -0700 |
| commit | 86fbf1486a44a4bce4fdcbe3665a7d8a62ba958a (patch) | |
| tree | 3b49c582fe07b8d82045e494cd3b0779c661f4b8 | |
| parent | 7b7fc708b568a258595e1fa911b930a75ac07b48 (diff) | |
| download | linux-3.10-86fbf1486a44a4bce4fdcbe3665a7d8a62ba958a.tar.gz linux-3.10-86fbf1486a44a4bce4fdcbe3665a7d8a62ba958a.tar.bz2 linux-3.10-86fbf1486a44a4bce4fdcbe3665a7d8a62ba958a.zip | |
[PATCH] Char: correct pci_get_device changes
Commits 881a8c120acf7ec09c90289e2996b7c70f51e996 and
efe1ec27837d6639eae82e1f5876910ba6433c3f corrects pci device matching in
only one way; it no longer oopses/crashes, despite hotplug is not solved
in these changes.
Whenever pci_find_device -> pci_get_device change is performed, also
pci_dev_get and pci_dev_put should be in most cases called to properly
handle hotplug. This patch does exactly this thing -- increase refcount
to let kernel know, that we are using this piece of HW just now.
It affects moxa and rio char drivers.
Cc: <R.E.Wolff@BitWizard.nl>
Acked-by: Amit Gud <gud@eth.net>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | drivers/char/moxa.c | 9 | ||||
| -rw-r--r-- | drivers/char/rio/host.h | 1 | ||||
| -rw-r--r-- | drivers/char/rio/rio_linux.c | 9 |
3 files changed, 19 insertions, 0 deletions
diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c index b401383808c..96cb1f07332 100644 --- a/drivers/char/moxa.c +++ b/drivers/char/moxa.c @@ -130,6 +130,7 @@ static moxa_isa_board_conf moxa_isa_boards[] = typedef struct _moxa_pci_devinfo { ushort busNum; ushort devNum; + struct pci_dev *pdev; } moxa_pci_devinfo; typedef struct _moxa_board_conf { @@ -324,6 +325,9 @@ static int moxa_get_PCI_conf(struct pci_dev *p, int board_type, moxa_board_conf board->busType = MOXA_BUS_TYPE_PCI; board->pciInfo.busNum = p->bus->number; board->pciInfo.devNum = p->devfn >> 3; + board->pciInfo.pdev = p; + /* don't lose the reference in the next pci_get_device iteration */ + pci_dev_get(p); return (0); } @@ -493,6 +497,11 @@ static void __exit moxa_exit(void) if (tty_unregister_driver(moxaDriver)) printk("Couldn't unregister MOXA Intellio family serial driver\n"); put_tty_driver(moxaDriver); + + for (i = 0; i < MAX_BOARDS; i++) + if (moxa_boards[i].busType == MOXA_BUS_TYPE_PCI) + pci_dev_put(moxa_boards[i].pciInfo.pdev); + if (verbose) printk("Done\n"); } diff --git a/drivers/char/rio/host.h b/drivers/char/rio/host.h index ee2ddea7a63..23d0681fe49 100644 --- a/drivers/char/rio/host.h +++ b/drivers/char/rio/host.h @@ -44,6 +44,7 @@ ** the host. */ struct Host { + struct pci_dev *pdev; unsigned char Type; /* RIO_EISA, RIO_MCA, ... */ unsigned char Ivec; /* POLLED or ivec number */ unsigned char Mode; /* Control stuff */ diff --git a/drivers/char/rio/rio_linux.c b/drivers/char/rio/rio_linux.c index c382df0f82f..7ac68cb3bed 100644 --- a/drivers/char/rio/rio_linux.c +++ b/drivers/char/rio/rio_linux.c @@ -1017,6 +1017,10 @@ static int __init rio_init(void) rio_dprintk(RIO_DEBUG_PROBE, "Hmm Tested ok, uniqid = %x.\n", p->RIOHosts[p->RIONumHosts].UniqueNum); fix_rio_pci(pdev); + + p->RIOHosts[p->RIONumHosts].pdev = pdev; + pci_dev_get(pdev); + p->RIOLastPCISearch = 0; p->RIONumHosts++; found++; @@ -1066,6 +1070,9 @@ static int __init rio_init(void) ((readb(&p->RIOHosts[p->RIONumHosts].Unique[1]) & 0xFF) << 8) | ((readb(&p->RIOHosts[p->RIONumHosts].Unique[2]) & 0xFF) << 16) | ((readb(&p->RIOHosts[p->RIONumHosts].Unique[3]) & 0xFF) << 24); rio_dprintk(RIO_DEBUG_PROBE, "Hmm Tested ok, uniqid = %x.\n", p->RIOHosts[p->RIONumHosts].UniqueNum); + p->RIOHosts[p->RIONumHosts].pdev = pdev; + pci_dev_get(pdev); + p->RIOLastPCISearch = 0; p->RIONumHosts++; found++; @@ -1181,6 +1188,8 @@ static void __exit rio_exit(void) } /* It is safe/allowed to del_timer a non-active timer */ del_timer(&hp->timer); + if (hp->Type == RIO_PCI) + pci_dev_put(hp->pdev); } if (misc_deregister(&rio_fw_device) < 0) { |