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ssb: Make ssb_wait_bit multi-bit safe 

ssb_wait_bit was designed for only one-bit bitmasks.
People start using it for multi-bit bitmasks. Make the "set" case
is safe for this. The "unset" case is already safe.

This does not change behavior of the current code.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Michael Büsch 2011-02-15 00:21:50 +01:00 committed by John W. Linville
parent f4f314bf6f
commit 8c68bd401d
1 changed files with 6 additions and 6 deletions
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12
drivers/ssb/main.c
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@ -1192,10 +1192,10 @@ void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
} }
EXPORT_SYMBOL(ssb_device_enable); EXPORT_SYMBOL(ssb_device_enable);
/* Wait for a bit in a register to get set or unset. /* Wait for bitmask in a register to get set or cleared.
* timeout is in units of ten-microseconds */ * timeout is in units of ten-microseconds */
static int ssb_wait_bit(struct ssb_device *dev, u16 reg, u32 bitmask, static int ssb_wait_bits(struct ssb_device *dev, u16 reg, u32 bitmask,
int timeout, int set) int timeout, int set)
{ {
int i; int i;
u32 val; u32 val;
@ -1203,7 +1203,7 @@ static int ssb_wait_bit(struct ssb_device *dev, u16 reg, u32 bitmask,
for (i = 0; i < timeout; i++) { for (i = 0; i < timeout; i++) {
val = ssb_read32(dev, reg); val = ssb_read32(dev, reg);
if (set) { if (set) {
if (val & bitmask) if ((val & bitmask) == bitmask)
return 0; return 0;
} else { } else {
if (!(val & bitmask)) if (!(val & bitmask))
@ -1227,8 +1227,8 @@ void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
reject = ssb_tmslow_reject_bitmask(dev); reject = ssb_tmslow_reject_bitmask(dev);
ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK); ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
ssb_wait_bit(dev, SSB_TMSLOW, reject, 1000, 1); ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1);
ssb_wait_bit(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0); ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
ssb_write32(dev, SSB_TMSLOW, ssb_write32(dev, SSB_TMSLOW,
SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
reject | SSB_TMSLOW_RESET | reject | SSB_TMSLOW_RESET |