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| author | Tim Deegan <tim@xen.org> | 2013-09-12 12:55:10 +0100 |
|---|---|---|
| committer | Tim Deegan <tim@xen.org> | 2013-09-12 17:48:01 +0100 |
| commit | e58015acaf53b179847db94524fb2a9f4399b5e6 (patch) | |
| tree | e984d45b33ef654b56f0b42bff3c1280b8d97f8c /xen/drivers | |
| parent | bc230d5dcabf31c6db82916df7d0b98ca11fbaad (diff) | |
| download | xen-e58015acaf53b179847db94524fb2a9f4399b5e6.tar.gz xen-e58015acaf53b179847db94524fb2a9f4399b5e6.tar.bz2 xen-e58015acaf53b179847db94524fb2a9f4399b5e6.zip | |
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@xen.org>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Diffstat (limited to 'xen/drivers')
| -rw-r--r-- | xen/drivers/char/ehci-dbgp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/xen/drivers/char/ehci-dbgp.c b/xen/drivers/char/ehci-dbgp.c index 301eedf22e..b900d6092e 100644 --- a/xen/drivers/char/ehci-dbgp.c +++ b/xen/drivers/char/ehci-dbgp.c @@ -1094,6 +1094,9 @@ 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]); |