[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 7/9] ehci-dbgp: avoid division by zero.
Unlikely to ever see hardware reporting 0 ports, but might as well fail gracefully if we do. Coverity CID 1055266 Signed-off-by: Tim Deegan <tim@xxxxxxx> Cc: Jan Beulich <jbeulich@xxxxxxxx> --- xen/drivers/char/ehci-dbgp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/xen/drivers/char/ehci-dbgp.c b/xen/drivers/char/ehci-dbgp.c index 2504979..0ac2dd9 100644 --- a/xen/drivers/char/ehci-dbgp.c +++ b/xen/drivers/char/ehci-dbgp.c @@ -1099,6 +1099,9 @@ try_next_port: dbgp_printk("n_ports: %u\n", n_ports); ehci_dbgp_status(dbgp, ""); + if ( n_ports == 0 ) + return -1; + for ( i = 1; i <= n_ports; i++ ) { portsc = readl(&dbgp->ehci_regs->port_status[i-1]); -- 1.7.10.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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