ata: libata-sff: kill unused ata_sff_busy_sleep()

Nobody seems to call ata_sff_busy_sleep(), so we can get rid of it...

Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>

diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 7916e36..153f49e 100644 (file)
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -184,62 +184,6 @@ void ata_sff_dma_pause(struct ata_port *ap)
 }
 EXPORT_SYMBOL_GPL(ata_sff_dma_pause);
 
-/**
- *     ata_sff_busy_sleep - sleep until BSY clears, or timeout
- *     @ap: port containing status register to be polled
- *     @tmout_pat: impatience timeout in msecs
- *     @tmout: overall timeout in msecs
- *
- *     Sleep until ATA Status register bit BSY clears,
- *     or a timeout occurs.
- *
- *     LOCKING:
- *     Kernel thread context (may sleep).
- *
- *     RETURNS:
- *     0 on success, -errno otherwise.
- */
-int ata_sff_busy_sleep(struct ata_port *ap,
-                      unsigned long tmout_pat, unsigned long tmout)
-{
-       unsigned long timer_start, timeout;
-       u8 status;
-
-       status = ata_sff_busy_wait(ap, ATA_BUSY, 300);
-       timer_start = jiffies;
-       timeout = ata_deadline(timer_start, tmout_pat);
-       while (status != 0xff && (status & ATA_BUSY) &&
-              time_before(jiffies, timeout)) {
-               ata_msleep(ap, 50);
-               status = ata_sff_busy_wait(ap, ATA_BUSY, 3);
-       }
-
-       if (status != 0xff && (status & ATA_BUSY))
-               ata_port_warn(ap,
-                             "port is slow to respond, please be patient (Status 0x%x)\n",
-                             status);
-
-       timeout = ata_deadline(timer_start, tmout);
-       while (status != 0xff && (status & ATA_BUSY) &&
-              time_before(jiffies, timeout)) {
-               ata_msleep(ap, 50);
-               status = ap->ops->sff_check_status(ap);
-       }
-
-       if (status == 0xff)
-               return -ENODEV;
-
-       if (status & ATA_BUSY) {
-               ata_port_err(ap,
-                            "port failed to respond (%lu secs, Status 0x%x)\n",
-                            DIV_ROUND_UP(tmout, 1000), status);
-               return -EBUSY;
-       }
-
-       return 0;
-}
-EXPORT_SYMBOL_GPL(ata_sff_busy_sleep);
-
 static int ata_sff_check_ready(struct ata_link *link)
 {
        u8 status = link->ap->ops->sff_check_status(link->ap);

diff --git a/include/linux/libata.h b/include/linux/libata.h
index af4953b..c9149eb 100644 (file)
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1918,8 +1918,6 @@ extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
 extern u8 ata_sff_check_status(struct ata_port *ap);
 extern void ata_sff_pause(struct ata_port *ap);
 extern void ata_sff_dma_pause(struct ata_port *ap);
-extern int ata_sff_busy_sleep(struct ata_port *ap,
-                             unsigned long timeout_pat, unsigned long timeout);
 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);