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From: Axel Lin <axel.lin-8E1dMatC8ynQT0dZR+AlfA@public.gmane.org>
To: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Wenyou Yang <wenyou.yang-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>,
	linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH] spi: atmel: Fix test unsigned var < 0
Date: Sat, 22 Mar 2014 22:33:29 +0800	[thread overview]
Message-ID: <1395498809.16958.1.camel@phoenix> (raw)

current_remaining_bytes is an unsigned long and cannot be below 0.

Signed-off-by: Axel Lin <axel.lin-8E1dMatC8ynQT0dZR+AlfA@public.gmane.org>
---
 drivers/spi/spi-atmel.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index bda961e..3e8c4cc 100644
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -873,13 +873,11 @@ atmel_spi_pump_pio_data(struct atmel_spi *as, struct spi_transfer *xfer)
 	} else {
 		spi_readl(as, RDR);
 	}
-	if (xfer->bits_per_word > 8) {
+
+	if (xfer->bits_per_word > 8)
 		as->current_remaining_bytes -= 2;
-		if (as->current_remaining_bytes < 0)
-			as->current_remaining_bytes = 0;
-	} else {
+	else
 		as->current_remaining_bytes--;
-	}
 }
 
 /* Interrupt
-- 
1.8.3.2



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             reply	other threads:[~2014-03-22 14:33 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-03-22 14:33 Axel Lin [this message]
2014-03-26 16:51 ` [PATCH] spi: atmel: Fix test unsigned var < 0 Mark Brown
     [not found]   ` <20140326165145.GD14287-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2014-03-27  0:46     ` Axel Lin
     [not found]       ` <CAFRkauBh+4-NmneTh=io7grG4MpSZ98riybAOOpEff+KiPZUjg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-03-27  1:13         ` Yang, Wenyou
2014-03-27  1:23           ` Axel Lin

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