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lm32: milkymist-tmu2: fix another integer overflow 

Don't truncate the multiplication and do a 64 bit one instead
because the result is stored in a 64 bit variable.

This fixes a similar coverity warning to commit 237a8650d6,
in a similar way, and is the other half of the fix for
coverity CID 1167561.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Michael Walle <michael@walle.cc>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Peter Maydell 2017-01-06 17:45:14 +00:00 committed by Michael Tokarev
parent a1f9108756
commit 4382fa6554
1 changed files with 1 additions and 1 deletions
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2
hw/display/milkymist-tmu2.c
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@ -257,7 +257,7 @@ static void tmu2_start(MilkymistTMU2State *s)
glColor4f(m, m, m, (float)(s->regs[R_ALPHA] + 1) / 64.0f);
/* Read the QEMU dest. framebuffer into the OpenGL framebuffer */
fb_len = 2 * s->regs[R_DSTHRES] * s->regs[R_DSTVRES];
fb_len = 2ULL * s->regs[R_DSTHRES] * s->regs[R_DSTVRES];
fb = cpu_physical_memory_map(s->regs[R_DSTFBUF], &fb_len, 0);
if (fb == NULL) {
glDeleteTextures(1, &texture);