mtip32xx: minor performance tweak

When checking for command completions if the register value is zero, proceed
to next register.

Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index cd271d5e1b73..29735316730a 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -970,6 +970,8 @@ static inline void mtip_process_sdbf(struct driver_data *dd)
         /* walk all bits in all slot groups */
         for (group = 0; group < dd->slot_groups; group++) {
                 completed = readl(port->completed[group]);
+                if (!completed)
+                        continue;
 
                 /* clear completed status register in the hardware.*/
                 writel(completed, port->completed[group]);