USB: ueagle-atm: use system_wq instead of dedicated workqueues

With cmwq, there's no reason to use separate workqueues.  Drop
uea_softc->work_q and use system_wq instead.  The used work item is
sync flushed on driver detach.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Stanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 5 insertions, 14 deletions

diff --git a/drivers/usb/atm/ueagle-atm.c b/drivers/usb/atm/ueagle-atm.c
index 99ac70e32556..b268e9fccb47 100644
--- a/drivers/usb/atm/ueagle-atm.c
+++ b/drivers/usb/atm/ueagle-atm.c
@@ -168,7 +168,6 @@ struct uea_softc {
         union cmv_dsc cmv_dsc;
 
         struct work_struct task;
-        struct workqueue_struct *work_q;
         u16 pageno;
         u16 ovl;
 
@@ -1879,7 +1878,7 @@ static int uea_start_reset(struct uea_softc *sc)
         /* start loading DSP */
         sc->pageno = 0;
         sc->ovl = 0;
-        queue_work(sc->work_q, &sc->task);
+        schedule_work(&sc->task);
 
         /* wait for modem ready CMV */
         ret = wait_cmv_ack(sc);
@@ -2091,14 +2090,14 @@ static void uea_schedule_load_page_e1(struct uea_softc *sc,
 {
         sc->pageno = intr->e1_bSwapPageNo;
         sc->ovl = intr->e1_bOvl >> 4 | intr->e1_bOvl << 4;
-        queue_work(sc->work_q, &sc->task);
+        schedule_work(&sc->task);
 }
 
 static void uea_schedule_load_page_e4(struct uea_softc *sc,
                                                 struct intr_pkt *intr)
 {
         sc->pageno = intr->e4_bSwapPageNo;
-        queue_work(sc->work_q, &sc->task);
+        schedule_work(&sc->task);
 }
 
 /*
@@ -2170,13 +2169,6 @@ static int uea_boot(struct uea_softc *sc)
 
         init_waitqueue_head(&sc->sync_q);
 
-        sc->work_q = create_workqueue("ueagle-dsp");
-        if (!sc->work_q) {
-                uea_err(INS_TO_USBDEV(sc), "cannot allocate workqueue\n");
-                uea_leaves(INS_TO_USBDEV(sc));
-                return -ENOMEM;
-        }
-
         if (UEA_CHIP_VERSION(sc) == ADI930)
                 load_XILINX_firmware(sc);
 
@@ -2225,7 +2217,6 @@ err1:
         sc->urb_int = NULL;
         kfree(intr);
 err0:
-        destroy_workqueue(sc->work_q);
         uea_leaves(INS_TO_USBDEV(sc));
         return -ENOMEM;
 }
@@ -2246,8 +2237,8 @@ static void uea_stop(struct uea_softc *sc)
         kfree(sc->urb_int->transfer_buffer);
         usb_free_urb(sc->urb_int);
 
-        /* stop any pending boot process, when no one can schedule work */
-        destroy_workqueue(sc->work_q);
+        /* flush the work item, when no one can schedule it */
+        flush_work_sync(&sc->task);
 
         if (sc->dsp_firm)
                 release_firmware(sc->dsp_firm);