[PATCH] I2O: new sysfs attributes and Adaptec specific block device access and 64-bit DMA support
Changes:
- Added Bus-OSM which could be used by user space programs to reset a
channel on the controller
- Make ioctl's in Config-OSM obsolete in prefer for sysfs attributes and
move those to its own file
- Added sysfs attribute for firmware read and write access for I2O
controllers
- Added special handling of firmware read and write access for Adaptec
controllers
- Added vendor id and product id as sysfs-attribute to Executive classes
- Added automatic notification of LCT change handling to Exec-OSM
- Added flushing function to Block-OSM for later barrier implementation
- Use PRIVATE messages for Block access on Adaptec controllers, which are
faster then BLOCK class access
- Cleaned up support for Promise controller
- New messages are now detected using the IRQ status register as
suggested by the I2O spec
- Added i2o_dma_high() and i2o_dma_low() functions
- Added facility for SG tablesize calculation when using 32-bit and
64-bit DMA addresses
- Added i2o_dma_map_single() and i2o_dma_map_sg() which could build the
SG list for 32-bit as well as 64-bit DMA addresses
Signed-off-by: Markus Lidel <Markus.Lidel@shadowconnect.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/message/i2o/driver.c b/drivers/message/i2o/driver.c
index bebdd50..393be8e 100644
--- a/drivers/message/i2o/driver.c
+++ b/drivers/message/i2o/driver.c
@@ -180,7 +180,13 @@
{
struct i2o_driver *drv;
struct i2o_message __iomem *msg = i2o_msg_out_to_virt(c, m);
- u32 context = readl(&msg->u.s.icntxt);
+ u32 context;
+ unsigned long flags;
+
+ if(unlikely(!msg))
+ return -EIO;
+
+ context = readl(&msg->u.s.icntxt);
if (unlikely(context >= i2o_max_drivers)) {
osm_warn("%s: Spurious reply to unknown driver %d\n", c->name,
@@ -188,9 +194,9 @@
return -EIO;
}
- spin_lock(&i2o_drivers_lock);
+ spin_lock_irqsave(&i2o_drivers_lock, flags);
drv = i2o_drivers[context];
- spin_unlock(&i2o_drivers_lock);
+ spin_unlock_irqrestore(&i2o_drivers_lock, flags);
if (unlikely(!drv)) {
osm_warn("%s: Spurious reply to unknown driver %d\n", c->name,