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Subject[PATCH][next][V2] staging: r8188eu: Fix while-loop that iterates only once
Date
From: Colin Ian King <colin.king@canonical.com>

The while-loop only iterates once becase the post increment test of count
being non-zero is false on the first iteration because count is zero. Fix
this by using a for-loop instead. Static analysis found the issue on the
count > POLLING_LLT_THRESHOLD check always being false since the loop
currently just iterates once.

Thanks to David Laight for suggesting using for-loop instead to improve
the readability of the fix.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
V2: use for-loop instead of change count increment to pre-increment.
---
drivers/staging/rtl8188eu/hal/rtl8188e_hal_init.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/rtl8188eu/hal/rtl8188e_hal_init.c b/drivers/staging/rtl8188eu/hal/rtl8188e_hal_init.c
index d1086699f952..1c6365832247 100644
--- a/drivers/staging/rtl8188eu/hal/rtl8188e_hal_init.c
+++ b/drivers/staging/rtl8188eu/hal/rtl8188e_hal_init.c
@@ -168,14 +168,14 @@ void rtw_hal_notch_filter(struct adapter *adapter, bool enable)
static s32 _LLTWrite(struct adapter *padapter, u32 address, u32 data)
{
s32 status = _SUCCESS;
- s32 count = 0;
+ s32 count;
u32 value = _LLT_INIT_ADDR(address) | _LLT_INIT_DATA(data) | _LLT_OP(_LLT_WRITE_ACCESS);
u16 LLTReg = REG_LLT_INIT;

usb_write32(padapter, LLTReg, value);

/* polling */
- do {
+ for (count = 0; ; count++) {
value = usb_read32(padapter, LLTReg);
if (_LLT_OP_VALUE(value) == _LLT_NO_ACTIVE)
break;
@@ -185,7 +185,7 @@ static s32 _LLTWrite(struct adapter *padapter, u32 address, u32 data)
break;
}
udelay(5);
- } while (count++);
+ }

return status;
}
--
2.31.1
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