diff options
| author | Paul Mackerras <paulus@samba.org> | 2006-05-19 15:02:42 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-05-19 15:02:42 +1000 |
| commit | 3c06da5ae5358e9d325d541a053e1059e9654bcc (patch) | |
| tree | 04c953cc82fe57cff248ac523095cd4f0d9611a7 /drivers/spi/spi.c | |
| parent | 4d1f3f25d9c303d1ce63b42cc94c54ac0ab2e950 (diff) | |
| parent | a54c9d30dbb06391ec4422aaf0e1dc2c8c53bd3e (diff) | |
Merge ../linux-2.6
Diffstat (limited to 'drivers/spi/spi.c')
| -rw-r--r-- | drivers/spi/spi.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 94f5e8ed83a..7a3f733051e 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -395,7 +395,7 @@ EXPORT_SYMBOL_GPL(spi_alloc_master); int __init_or_module spi_register_master(struct spi_master *master) { - static atomic_t dyn_bus_id = ATOMIC_INIT(0); + static atomic_t dyn_bus_id = ATOMIC_INIT((1<<16) - 1); struct device *dev = master->cdev.dev; int status = -ENODEV; int dynamic = 0; @@ -404,7 +404,7 @@ spi_register_master(struct spi_master *master) return -ENODEV; /* convention: dynamically assigned bus IDs count down from the max */ - if (master->bus_num == 0) { + if (master->bus_num < 0) { master->bus_num = atomic_dec_return(&dyn_bus_id); dynamic = 1; } @@ -522,7 +522,8 @@ int spi_sync(struct spi_device *spi, struct spi_message *message) } EXPORT_SYMBOL_GPL(spi_sync); -#define SPI_BUFSIZ (SMP_CACHE_BYTES) +/* portable code must never pass more than 32 bytes */ +#define SPI_BUFSIZ max(32,SMP_CACHE_BYTES) static u8 *buf; |