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| author | Ian Abbott <abbotti@mev.co.uk> | 2010-05-19 14:10:03 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-06-17 13:28:57 -0700 |
| commit | 668f272e57e80ece987bed273096f8e3a707123c (patch) | |
| tree | 8c75ccf8c86b082040feca43db00478548ef5a74 /drivers/staging/comedi | |
| parent | fa3b5d9ab0487f58b45d55a37070aa0d417f59d5 (diff) | |
| download | blackbird-obmc-linux-668f272e57e80ece987bed273096f8e3a707123c.tar.gz blackbird-obmc-linux-668f272e57e80ece987bed273096f8e3a707123c.zip | |
Staging: comedi: serial2002: Reduce stack usage on 'open'
Reduce stack usage in serial_2002_open() by allocating dig_in_config,
dig_out_config, chan_in_config, and chan_out_config temporary arrays
using kcalloc() and freeing them when done with.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/comedi')
| -rw-r--r-- | drivers/staging/comedi/drivers/serial2002.c | 44 |
1 files changed, 23 insertions, 21 deletions
diff --git a/drivers/staging/comedi/drivers/serial2002.c b/drivers/staging/comedi/drivers/serial2002.c index 6813e3465f6e..c929f986118c 100644 --- a/drivers/staging/comedi/drivers/serial2002.c +++ b/drivers/staging/comedi/drivers/serial2002.c @@ -412,30 +412,25 @@ static int serial_2002_open(struct comedi_device *dev) int max; }; - struct config_t dig_in_config[32]; - struct config_t dig_out_config[32]; - struct config_t chan_in_config[32]; - struct config_t chan_out_config[32]; + struct config_t *dig_in_config; + struct config_t *dig_out_config; + struct config_t *chan_in_config; + struct config_t *chan_out_config; int i; result = 0; - for (i = 0; i < 32; i++) { - dig_in_config[i].kind = 0; - dig_in_config[i].bits = 0; - dig_in_config[i].min = 0; - dig_in_config[i].max = 0; - dig_out_config[i].kind = 0; - dig_out_config[i].bits = 0; - dig_out_config[i].min = 0; - dig_out_config[i].max = 0; - chan_in_config[i].kind = 0; - chan_in_config[i].bits = 0; - chan_in_config[i].min = 0; - chan_in_config[i].max = 0; - chan_out_config[i].kind = 0; - chan_out_config[i].bits = 0; - chan_out_config[i].min = 0; - chan_out_config[i].max = 0; + dig_in_config = kcalloc(32, sizeof(struct config_t), + GFP_KERNEL); + dig_out_config = kcalloc(32, sizeof(struct config_t), + GFP_KERNEL); + chan_in_config = kcalloc(32, sizeof(struct config_t), + GFP_KERNEL); + chan_out_config = kcalloc(32, sizeof(struct config_t), + GFP_KERNEL); + if (!dig_in_config || !dig_out_config + || !chan_in_config || !chan_out_config) { + result = -ENOMEM; + goto err_alloc_configs; } tty_setspeed(devpriv->tty, devpriv->speed); @@ -690,6 +685,13 @@ static int serial_2002_open(struct comedi_device *dev) s->range_table_list = NULL; } } + +err_alloc_configs: + kfree(dig_in_config); + kfree(dig_out_config); + kfree(chan_in_config); + kfree(chan_out_config); + if (result) { if (devpriv->tty) { filp_close(devpriv->tty, 0); |
