From: P J P <ppandit@redhat.com>
To: Gerd Hoffmann <kraxel@redhat.com>
Cc: Ren Ding <rding@gatech.edu>, Yi Ren <c4tren@gmail.com>,
QEMU Developers <qemu-devel@nongnu.org>,
Hanqing Zhao <hanqing@gatech.edu>
Subject: Re: [PATCH] ati-vga: increment mm_index in ati_mm_read/write
Date: Wed, 3 Jun 2020 20:05:50 +0530 (IST) [thread overview]
Message-ID: <nycvar.YSQ.7.77.849.2006031952260.62159@xnncv> (raw)
In-Reply-To: <20200603134404.xdb2koul7fatv4ez@sirius.home.kraxel.org>
+-- On Wed, 3 Jun 2020, Gerd Hoffmann wrote --+
| Hmm, why modify mm_index? Shouldn't we just check it is non-zero
| before calling ati_mm_read/ati_mm_write?
if (s->regs.mm_index & BIT(31)) {
...
} else {
ati_mm_write(s, s->regs.mm_index + addr - MM_DATA, data, size);
}
Exit condition for recursion is to set (mm_index & BIT(31)), so recursion
would continue even with non-zero values I think.
Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
8685 545E B54C 486B C6EB 271E E285 8B5A F050 DE8D
next prev parent reply other threads:[~2020-06-03 14:36 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-03 12:47 [PATCH] ati-vga: increment mm_index in ati_mm_read/write P J P
2020-06-03 13:44 ` Gerd Hoffmann
2020-06-03 13:56 ` BALATON Zoltan
2020-06-03 14:35 ` P J P [this message]
2020-06-03 15:32 ` Gerd Hoffmann
2020-06-03 15:38 ` BALATON Zoltan
2020-06-03 15:43 ` BALATON Zoltan
2020-06-03 19:08 ` P J P
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