1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/scsi/fd_mcs.c b/drivers/scsi/fd_mcs.c
index 4a358aec2e59..fa652f8aa643 100644
--- a/drivers/scsi/fd_mcs.c
+++ b/drivers/scsi/fd_mcs.c
@@ -1243,6 +1243,7 @@ static int fd_mcs_abort(Scsi_Cmnd * SCpnt)
 
 static int fd_mcs_bus_reset(Scsi_Cmnd * SCpnt) {
         struct Scsi_Host *shpnt = SCpnt->device->host;
+        unsigned long flags;
 
 #if DEBUG_RESET
         static int called_once = 0;
@@ -1259,6 +1260,8 @@ static int fd_mcs_bus_reset(Scsi_Cmnd * SCpnt) {
         called_once = 1;
 #endif
 
+        spin_lock_irqsave(shpnt->host_lock, flags);
+
         outb(1, SCSI_Cntl_port);
         do_pause(2);
         outb(0, SCSI_Cntl_port);
@@ -1266,6 +1269,8 @@ static int fd_mcs_bus_reset(Scsi_Cmnd * SCpnt) {
         outb(0, SCSI_Mode_Cntl_port);
         outb(PARITY_MASK, TMC_Cntl_port);
 
+        spin_unlock_irqrestore(shpnt->host_lock, flags);
+
         /* Unless this is the very first call (i.e., SCPnt == NULL), everything
            is probably hosed at this point.  We will, however, try to keep
            things going by informing the high-level code that we need help. */