[PATCH v4 16/40] scsi: mpi3mr: optimize the driver by using find_and_set_bit()

[Yury Norov <yury.norov@gmail.com>]

mpi3mr_dev_rmhs_send_tm() and mpi3mr_send_event_ack() opencode
find_and_set_bit(). Simplify them by using dedicated function.

CC: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
---
 drivers/scsi/mpi3mr/mpi3mr_os.c | 22 +++++++---------------
 1 file changed, 7 insertions(+), 15 deletions(-)

diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c
index bce639a6cca1..8ad1521dd0b3 100644
--- a/drivers/scsi/mpi3mr/mpi3mr_os.c
+++ b/drivers/scsi/mpi3mr/mpi3mr_os.c
@@ -7,6 +7,7 @@
  *
  */
 
+#include <linux/find_atomic.h>
 #include "mpi3mr.h"
 #include <linux/idr.h>
 
@@ -2292,13 +2293,9 @@ static void mpi3mr_dev_rmhs_send_tm(struct mpi3mr_ioc *mrioc, u16 handle,
 	if (drv_cmd)
 		goto issue_cmd;
 	do {
-		cmd_idx = find_first_zero_bit(mrioc->devrem_bitmap,
-		    MPI3MR_NUM_DEVRMCMD);
-		if (cmd_idx < MPI3MR_NUM_DEVRMCMD) {
-			if (!test_and_set_bit(cmd_idx, mrioc->devrem_bitmap))
-				break;
-			cmd_idx = MPI3MR_NUM_DEVRMCMD;
-		}
+		cmd_idx = find_and_set_bit(mrioc->devrem_bitmap, MPI3MR_NUM_DEVRMCMD);
+		if (cmd_idx < MPI3MR_NUM_DEVRMCMD)
+			break;
 	} while (retrycount--);
 
 	if (cmd_idx >= MPI3MR_NUM_DEVRMCMD) {
@@ -2433,14 +2430,9 @@ static void mpi3mr_send_event_ack(struct mpi3mr_ioc *mrioc, u8 event,
 	    "sending event ack in the top half for event(0x%02x), event_ctx(0x%08x)\n",
 	    event, event_ctx);
 	do {
-		cmd_idx = find_first_zero_bit(mrioc->evtack_cmds_bitmap,
-		    MPI3MR_NUM_EVTACKCMD);
-		if (cmd_idx < MPI3MR_NUM_EVTACKCMD) {
-			if (!test_and_set_bit(cmd_idx,
-			    mrioc->evtack_cmds_bitmap))
-				break;
-			cmd_idx = MPI3MR_NUM_EVTACKCMD;
-		}
+		cmd_idx = find_and_set_bit(mrioc->evtack_cmds_bitmap, MPI3MR_NUM_EVTACKCMD);
+		if (cmd_idx < MPI3MR_NUM_EVTACKCMD)
+			break;
 	} while (retrycount--);
 
 	if (cmd_idx >= MPI3MR_NUM_EVTACKCMD) {
-- 
2.43.0