Factor out disconnect code (called when a device disappears) to a separate function. Add a check for NODEV errno to a few more places to make sure we notice disconnects.
Signed-off-by: Gerd Hoffmann <kra...@redhat.com> --- usb-linux.c | 27 ++++++++++++++++++++------- 1 files changed, 20 insertions(+), 7 deletions(-) diff --git a/usb-linux.c b/usb-linux.c index baa6574..b195e38 100644 --- a/usb-linux.c +++ b/usb-linux.c @@ -268,6 +268,14 @@ static void async_free(AsyncURB *aurb) qemu_free(aurb); } +static void do_disconnect(USBHostDevice *s) +{ + printf("husb: device %d.%d disconnected\n", + s->bus_num, s->addr); + usb_host_close(s); + usb_host_auto_check(NULL); +} + static void async_complete(void *opaque) { USBHostDevice *s = opaque; @@ -282,10 +290,7 @@ static void async_complete(void *opaque) return; } if (errno == ENODEV && !s->closing) { - printf("husb: device %d.%d disconnected\n", - s->bus_num, s->addr); - usb_host_close(s); - usb_host_auto_check(NULL); + do_disconnect(s); return; } @@ -359,6 +364,7 @@ static void usb_host_async_cancel(USBDevice *dev, USBPacket *p) static int usb_host_claim_interfaces(USBHostDevice *dev, int configuration) { + const char *op = NULL; int dev_descr_len, config_descr_len; int interface, nb_interfaces; int ret, i; @@ -411,9 +417,9 @@ static int usb_host_claim_interfaces(USBHostDevice *dev, int configuration) ctrl.ioctl_code = USBDEVFS_DISCONNECT; ctrl.ifno = interface; ctrl.data = 0; + op = "USBDEVFS_DISCONNECT"; ret = ioctl(dev->fd, USBDEVFS_IOCTL, &ctrl); if (ret < 0 && errno != ENODATA) { - perror("USBDEVFS_DISCONNECT"); goto fail; } } @@ -422,6 +428,7 @@ static int usb_host_claim_interfaces(USBHostDevice *dev, int configuration) /* XXX: only grab if all interfaces are free */ for (interface = 0; interface < nb_interfaces; interface++) { + op = "USBDEVFS_CLAIMINTERFACE"; ret = ioctl(dev->fd, USBDEVFS_CLAIMINTERFACE, &interface); if (ret < 0) { if (errno == EBUSY) { @@ -429,8 +436,7 @@ static int usb_host_claim_interfaces(USBHostDevice *dev, int configuration) } else { perror("husb: failed to claim interface"); } - fail: - return 0; + goto fail; } } @@ -440,6 +446,13 @@ static int usb_host_claim_interfaces(USBHostDevice *dev, int configuration) dev->ninterfaces = nb_interfaces; dev->configuration = configuration; return 1; + +fail: + if (errno == ENODEV) { + do_disconnect(dev); + } + perror(op); + return 0; } static int usb_host_release_interfaces(USBHostDevice *s) -- 1.7.1