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crypto: omap-des - fix BUG_ON condition

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dd->total is unsigned so it won't do any good to check for negative
value after subtracting instead of that we should check if the
subtracted value is bigger than him

This was partially found by using a static code analysis program
called cppcheck.

Signed-off-by: Asaf Vertz <asaf.vertz@tandemg.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Asaf Vertz 2015-01-05 10:23:10 +02:00 committed by Herbert Xu
parent 28c29f5657
commit 42d2e780c6
1 changed files with 2 additions and 2 deletions
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4
drivers/crypto/omap-des.c
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@ -965,9 +965,9 @@ static irqreturn_t omap_des_irq(int irq, void *dev_id)
}
}
dd->total -= DES_BLOCK_SIZE;
BUG_ON(dd->total < DES_BLOCK_SIZE);
BUG_ON(dd->total < 0);
dd->total -= DES_BLOCK_SIZE;
/* Clear IRQ status */
status &= ~DES_REG_IRQ_DATA_OUT;