diff options
| author | Paul Walmsley <paul@pwsan.com> | 2009-12-08 16:33:16 -0700 |
|---|---|---|
| committer | paul <paul@twilight.(none)> | 2009-12-11 17:00:43 -0700 |
| commit | 6f8b7ff5b01e16a65c3b17865ce047faeca40907 (patch) | |
| tree | ae5ecb4b377588b157c23176cf95a5c9631206ba /arch/arm/mach-omap2 | |
| parent | 3863c74b512c1afd3ce6b2f81d8dea9f1d860968 (diff) | |
OMAP clock/hwmod: fix off-by-one errors
Fix loop bailout off-by-one bugs reported by Juha Leppänen
<juha_motorsportcom@luukku.com>.
This second version incorporates comments from Russell King
<linux@arm.linux.org.uk>. A new macro, 'omap_test_timeout', has
been created, with cleaner code, and existing code has been converted
to use it.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Juha Leppänen <juha_motorsportcom@luukku.com>
Cc: Russell King <linux@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-omap2')
| -rw-r--r-- | arch/arm/mach-omap2/cm.c | 7 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 13 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/prcm.c | 5 |
3 files changed, 11 insertions, 14 deletions
diff --git a/arch/arm/mach-omap2/cm.c b/arch/arm/mach-omap2/cm.c index 8eb2dab8c7d..58e4a1c557d 100644 --- a/arch/arm/mach-omap2/cm.c +++ b/arch/arm/mach-omap2/cm.c @@ -21,6 +21,8 @@ #include <asm/atomic.h> +#include <plat/common.h> + #include "cm.h" #include "cm-regbits-24xx.h" #include "cm-regbits-34xx.h" @@ -61,9 +63,8 @@ int omap2_cm_wait_module_ready(s16 prcm_mod, u8 idlest_id, u8 idlest_shift) mask = 1 << idlest_shift; /* XXX should be OMAP2 CM */ - while (((cm_read_mod_reg(prcm_mod, cm_idlest_reg) & mask) != ena) && - (i++ < MAX_MODULE_READY_TIME)) - udelay(1); + omap_test_timeout(((cm_read_mod_reg(prcm_mod, cm_idlest_reg) & mask) == ena), + MAX_MODULE_READY_TIME, i); return (i < MAX_MODULE_READY_TIME) ? 0 : -EBUSY; } diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 633b216a8b2..7aaf5f1eea7 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -45,6 +45,7 @@ #include <linux/mutex.h> #include <linux/bootmem.h> +#include <plat/common.h> #include <plat/cpu.h> #include <plat/clockdomain.h> #include <plat/powerdomain.h> @@ -736,7 +737,7 @@ static int _wait_target_ready(struct omap_hwmod *oh) static int _reset(struct omap_hwmod *oh) { u32 r, v; - int c; + int c = 0; if (!oh->sysconfig || !(oh->sysconfig->sysc_flags & SYSC_HAS_SOFTRESET) || @@ -758,13 +759,9 @@ static int _reset(struct omap_hwmod *oh) return r; _write_sysconfig(v, oh); - c = 0; - while (c < MAX_MODULE_RESET_WAIT && - !(omap_hwmod_readl(oh, oh->sysconfig->syss_offs) & - SYSS_RESETDONE_MASK)) { - udelay(1); - c++; - } + omap_test_timeout((omap_hwmod_readl(oh, oh->sysconfig->syss_offs) & + SYSS_RESETDONE_MASK), + MAX_MODULE_RESET_WAIT, c); if (c == MAX_MODULE_RESET_WAIT) WARN(1, "omap_hwmod: %s: failed to reset in %d usec\n", diff --git a/arch/arm/mach-omap2/prcm.c b/arch/arm/mach-omap2/prcm.c index 9208b6e873a..79637c2eaf6 100644 --- a/arch/arm/mach-omap2/prcm.c +++ b/arch/arm/mach-omap2/prcm.c @@ -241,9 +241,8 @@ int omap2_cm_wait_idlest(void __iomem *reg, u32 mask, const char *name) BUG(); /* Wait for lock */ - while (((__raw_readl(reg) & mask) != ena) && - (i++ < MAX_MODULE_ENABLE_WAIT)) - udelay(1); + omap_test_timeout(((__raw_readl(reg) & mask) == ena), + MAX_MODULE_ENABLE_WAIT, i); if (i < MAX_MODULE_ENABLE_WAIT) pr_debug("cm: Module associated with clock %s ready after %d " |