Thread (3 messages) 3 messages, 2 authors, 2021-06-30

Re: [PATCH] staging: r8188eu: Fix while-loop that iterates only once

From: Colin Ian King <hidden>
Date: 2021-06-30 06:44:52
Also in: kernel-janitors, lkml

On 29/06/2021 22:53, David Laight wrote:
From: Colin King
quoted
Sent: 29 June 2021 17:36

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 incrementing count using pre-increment. Static analysis found the
issue on the count > POLLING_LLT_THRESHOLD check always being false since
the loop currently just iterates once.
But that is a very strange 'loop bottom'.

...
quoted
diff --git a/drivers/staging/rtl8188eu/hal/rtl8188e_hal_init.c
b/drivers/staging/rtl8188eu/hal/rtl8188e_hal_init.c
index d1086699f952..db57f04e7e56 100644
--- a/drivers/staging/rtl8188eu/hal/rtl8188e_hal_init.c
+++ b/drivers/staging/rtl8188eu/hal/rtl8188e_hal_init.c
@@ -185,7 +185,7 @@ static s32 _LLTWrite(struct adapter *padapter, u32 address, u32 data)
 			break;
 		}
 		udelay(5);
-	} while (count++);
+	} while (++count);
Unless 'count' is negative that might as well be 'while (1)'
with count incremented elsewhere.
Perhaps the loop top should be:
	for (count = 0;; count++) {
I'll rework it, thanks for the input.
   David

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