Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (38 commits)
  fusion: mptsas, fix lock imbalance
  [SCSI] scsi_transport_fc: replace BUS_ID_SIZE by fixed count
  sd, sr: fix Driver 'sd' needs updating message
  scsi_transport_iscsi: return -EOVERFLOW for Too many iscsi targets
  fc_transport: Selective return value from BSG timeout function
  fc_transport: The softirq_done function registration for BSG request
  sym53c8xx: ratelimit parity errors
  explain the hidden scsi_wait_scan Kconfig variable
  ibmvfc: Fix endless PRLI loop in discovery
  ibmvfc: Process async events before command responses
  libfc: Add runtime debugging with debug_logging module parameter
  libfcoe: Add runtime debugging with module param debug_logging
  fcoe: Add runtime debug logging with module parameter debug_logging
  scsi_debug: Add support for physical block exponent and alignment
  cnic: add NETDEV_1000 and NETDEVICES to Kconfig select
  cnic: Fix __symbol_get() build error.
  Revert "[SCSI] cnic: fix error: implicit declaration of function ‘__symbol_get’"
  ipr: differentiate pci-x and pci-e based adapters
  ipr: add test for MSI interrupt support
  scsi_transport_spi: Blacklist Ultrium-3 tape for IU transfers
  ...

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index 89d41a424b33..5fd2da494d08 100644
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c
@@ -40,7 +40,7 @@
 #include "scsi_logging.h"
 
 
-static int scsi_host_next_hn;           /* host_no for next new host */
+static atomic_t scsi_host_next_hn;      /* host_no for next new host */
 
 
 static void scsi_host_cls_release(struct device *dev)
@@ -333,7 +333,11 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
 
         mutex_init(&shost->scan_mutex);
 
-        shost->host_no = scsi_host_next_hn++; /* XXX(hch): still racy */
+        /*
+         * subtract one because we increment first then return, but we need to
+         * know what the next host number was before increment
+         */
+        shost->host_no = atomic_inc_return(&scsi_host_next_hn) - 1;
         shost->dma_channel = 0xff;
 
         /* These three are default values which can be overridden */