1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/scsi/mac53c94.c b/drivers/scsi/mac53c94.c
index 9a792a5494b5..edd47d1f0b17 100644
--- a/drivers/scsi/mac53c94.c
+++ b/drivers/scsi/mac53c94.c
@@ -103,6 +103,9 @@ static int mac53c94_host_reset(struct scsi_cmnd *cmd)
         struct fsc_state *state = (struct fsc_state *) cmd->device->host->hostdata;
         struct mac53c94_regs __iomem *regs = state->regs;
         struct dbdma_regs __iomem *dma = state->dma;
+        unsigned long flags;
+
+        spin_lock_irqsave(cmd->device->host->host_lock, flags);
 
         writel((RUN|PAUSE|FLUSH|WAKE) << 16, &dma->control);
         writeb(CMD_SCSI_RESET, &regs->command); /* assert RST */
@@ -111,6 +114,8 @@ static int mac53c94_host_reset(struct scsi_cmnd *cmd)
         udelay(20);
         mac53c94_init(state);
         writeb(CMD_NOP, &regs->command);
+
+        spin_unlock_irqrestore(cmd->device->host->host_lock, flags);
         return SUCCESS;
 }