diff options
| author | Avi Kivity <avi@redhat.com> | 2012-05-07 15:00:45 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2012-05-08 17:09:53 +0300 |
| commit | bdc62e62ead1a6c2a113934bf28cb5abef48618d (patch) | |
| tree | 879fc26ba0fb234b1a33c85ad2e433eabbb581fc | |
| parent | 847c25d01cbe8e4fe457a7426f82daaaf3287aae (diff) | |
rtl8139: fix regression in TxStatus/TxAddr read
Commit afe0a595356192 added byte reads for TxStatus/TxAddr, but
broke 32-bit reads; the mask generation
(1 << (8 * size)) - 1
is unspecified in C for size >= sizeof(int), and in fact returns 0
on x86.
Fix by using a larger type.
Fixes (at least) Fedora 9 i386 with -machine kernel_irqchip=on. I
didn't see it with the qemu APIC implementation; may be due to timing
or (more likely) a tester error.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | hw/rtl8139.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/rtl8139.c b/hw/rtl8139.c index 4d0f5ba518..eb22d04fad 100644 --- a/hw/rtl8139.c +++ b/hw/rtl8139.c @@ -2500,7 +2500,7 @@ static uint32_t rtl8139_TxStatus_TxAddr_read(RTL8139State *s, uint32_t regs[], case 1: /* fall through */ case 2: /* fall through */ case 4: - ret = (regs[reg] >> offset * 8) & ((1 << (size * 8)) - 1); + ret = (regs[reg] >> offset * 8) & (((uint64_t)1 << (size * 8)) - 1); DPRINTF("TxStatus/TxAddr[%d] read addr=0x%x size=0x%x val=0x%08x\n", reg, addr, size, ret); break; |