diff options
| author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-30 09:38:19 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-30 09:38:19 -0700 |
| commit | 0cd43f83d381c4246a08cd775834833d6fd64805 (patch) | |
| tree | e69ddf876edfb4ff7d5d5d0c6e7c2ff0be885492 /drivers/ieee1394/csr.c | |
| parent | db1a19b38f3a85f475b4ad716c71be133d8ca48e (diff) | |
| parent | 3253b669eed7194ae490acb4aadab7262bbfeb8d (diff) | |
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: (48 commits)
ieee1394: raw1394: arm functions slept in atomic context
ieee1394: sbp2: enable auto spin-up for all SBP-2 devices
MAINTAINERS: updates to IEEE 1394 subsystem maintainership
ieee1394: ohci1394: check for errors in suspend or resume
set power state of firewire host during suspend
ieee1394: ohci1394: more obvious endianess handling
ieee1394: ohci1394: fix endianess bug in debug message
ieee1394: sbp2: don't prefer MODE SENSE 10
ieee1394: nodemgr: grab class.subsys.rwsem in nodemgr_resume_ne
ieee1394: nodemgr: fix rwsem recursion
ieee1394: sbp2: more help in Kconfig
ieee1394: sbp2: prevent rare deadlock in shutdown
ieee1394: sbp2: update includes
ieee1394: sbp2: better handling of transport errors
ieee1394: sbp2: recheck node generation in sbp2_update
ieee1394: sbp2: safer agent reset in error handlers
ieee1394: sbp2: handle "sbp2util_node_write_no_wait failed"
CONFIG_PM=n slim: drivers/ieee1394/ohci1394.c
ieee1394: safer definition of empty macros
video1394: add poll file operation support
...
Diffstat (limited to 'drivers/ieee1394/csr.c')
| -rw-r--r-- | drivers/ieee1394/csr.c | 31 |
1 files changed, 10 insertions, 21 deletions
diff --git a/drivers/ieee1394/csr.c b/drivers/ieee1394/csr.c index 149573db91c..ab0c80f61b9 100644 --- a/drivers/ieee1394/csr.c +++ b/drivers/ieee1394/csr.c @@ -17,11 +17,13 @@ * */ -#include <linux/string.h> +#include <linux/jiffies.h> +#include <linux/kernel.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/param.h> #include <linux/spinlock.h> +#include <linux/string.h> #include "csr1212.h" #include "ieee1394_types.h" @@ -149,31 +151,18 @@ static void host_reset(struct hpsb_host *host) /* * HI == seconds (bits 0:2) - * LO == fraction units of 1/8000 of a second, as per 1394 (bits 19:31) - * - * Convert to units and then to HZ, for comparison to jiffies. - * - * By default this will end up being 800 units, or 100ms (125usec per - * unit). + * LO == fractions of a second in units of 125usec (bits 19:31) * - * NOTE: The spec says 1/8000, but also says we can compute based on 1/8192 - * like CSR specifies. Should make our math less complex. + * Convert SPLIT_TIMEOUT to jiffies. + * The default and minimum as per 1394a-2000 clause 8.3.2.2.6 is 100ms. */ static inline void calculate_expire(struct csr_control *csr) { - unsigned long units; - - /* Take the seconds, and convert to units */ - units = (unsigned long)(csr->split_timeout_hi & 0x07) << 13; - - /* Add in the fractional units */ - units += (unsigned long)(csr->split_timeout_lo >> 19); - - /* Convert to jiffies */ - csr->expire = (unsigned long)(units * HZ) >> 13UL; + unsigned long usecs = + (csr->split_timeout_hi & 0x07) * USEC_PER_SEC + + (csr->split_timeout_lo >> 19) * 125L; - /* Just to keep from rounding low */ - csr->expire++; + csr->expire = usecs_to_jiffies(usecs > 100000L ? usecs : 100000L); HPSB_VERBOSE("CSR: setting expire to %lu, HZ=%u", csr->expire, HZ); } |