diff options
| author | Jiri Slaby <jslaby@suse.cz> | 2021-06-18 09:14:58 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-18 14:10:02 +0300 |
| commit | f8b6b327aa73dd69577abd4e164447a9cc124315 (patch) | |
| tree | 71b9aa0da6ddb2d27d993242fd069cd63072f4c0 /drivers/tty/mxser.c | |
| parent | 13d4aba8a9747c5f88e537cc065a511fe64f92eb (diff) | |
| download | linux-f8b6b327aa73dd69577abd4e164447a9cc124315.tar.xz | |
mxser: alloc struct mxser_board dynamically
There is no need to preallocate an array of four struct mxser_board's.
In most cases a single board or two will be present in a machine. So
allocate struct mxser_board as needed in ->probe.
This makes mxser_boards a bit array. There we store which indexes are
free (unallocated).
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-53-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/mxser.c')
| -rw-r--r-- | drivers/tty/mxser.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index 30b3a5ab6bea..0e99225e260f 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -278,7 +278,7 @@ struct mxser_board { struct mxser_port ports[MXSER_PORTS_PER_BOARD]; }; -static struct mxser_board mxser_boards[MXSER_BOARDS]; +static DECLARE_BITMAP(mxser_boards, MXSER_BOARDS); static struct tty_driver *mxvar_sdriver; static u8 __mxser_must_set_EFR(unsigned long baseio, u8 clear, u8 set, @@ -1916,31 +1916,32 @@ static int mxser_probe(struct pci_dev *pdev, struct device *tty_dev; int retval = -EINVAL; - for (i = 0; i < MXSER_BOARDS; i++) - if (mxser_boards[i].nports == 0) - break; - + i = find_first_zero_bit(mxser_boards, MXSER_BOARDS); if (i >= MXSER_BOARDS) { dev_err(&pdev->dev, "too many boards found (maximum %d), board " "not configured\n", MXSER_BOARDS); goto err; } - brd = &mxser_boards[i]; + brd = devm_kzalloc(&pdev->dev, sizeof(*brd), GFP_KERNEL); + if (!brd) + goto err; + brd->idx = i; + __set_bit(brd->idx, mxser_boards); base = i * MXSER_PORTS_PER_BOARD; retval = pcim_enable_device(pdev); if (retval) { dev_err(&pdev->dev, "PCI enable failed\n"); - goto err; + goto err_zero; } /* io address */ ioaddress = pci_resource_start(pdev, 2); retval = pci_request_region(pdev, 2, "mxser(IO)"); if (retval) - goto err; + goto err_zero; brd->nports = nports; for (i = 0; i < nports; i++) @@ -1984,7 +1985,7 @@ err_relbrd: for (i = 0; i < nports; i++) tty_port_destroy(&brd->ports[i].port); err_zero: - brd->nports = 0; + __clear_bit(brd->idx, mxser_boards); err: return retval; } @@ -1999,7 +2000,7 @@ static void mxser_remove(struct pci_dev *pdev) tty_port_destroy(&brd->ports[i].port); } - brd->nports = 0; + __clear_bit(brd->idx, mxser_boards); } static struct pci_driver mxser_driver = { |