diff options
Diffstat (limited to 'extras/scsi_id/scsi_serial.c')
| -rw-r--r-- | extras/scsi_id/scsi_serial.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/extras/scsi_id/scsi_serial.c b/extras/scsi_id/scsi_serial.c index c5cacfa114..bea447fdac 100644 --- a/extras/scsi_id/scsi_serial.c +++ b/extras/scsi_id/scsi_serial.c @@ -819,18 +819,24 @@ int scsi_get_serial (struct scsi_id_device *dev_scsi, const char *devname, int page_code, char *serial_short, int len) { unsigned char page0[SCSI_INQ_BUFF_LEN]; - int fd; + int fd = -1; + int cnt = 10; int ind; int retval; memset(dev_scsi->serial, 0, len); dbg("opening %s\n", devname); - fd = open(devname, O_RDONLY | O_NONBLOCK); - if (fd < 0) { - info("%s: cannot open %s: %s\n", - dev_scsi->kernel, devname, strerror(errno)); - return 1; + while (--cnt) { + fd = open(devname, O_RDONLY | O_NONBLOCK); + if (fd >= 0) + break; + info("%s: cannot open %s: %s\n", dev_scsi->kernel, devname, strerror(errno)); + if (errno != EBUSY) + break; + usleep(500000 + (rand() % 100000) ); } + if (fd < 0) + return 1; if (page_code == PAGE_80) { if (do_scsi_page80_inquiry(dev_scsi, fd, dev_scsi->serial, serial_short, len)) { |