[PATCH 3.18 037/105] staging: rt5208: Fix a sleep-in-atomic bug in xd_copy_page

[Greg Kroah-Hartman]

3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jia-Ju Bai <baijiaju1...@163.com>

commit 498c4b4e9c23855d17ecc2a108d949bb68020481 upstream.

The driver may sleep under a spin lock, and the function call path is:
rtsx_exclusive_enter_ss (acquire the lock by spin_lock)
  rtsx_enter_ss
    rtsx_power_off_card
      xd_cleanup_work
        xd_delay_write
          xd_finish_write
            xd_copy_page
              wait_timeout
                schedule_timeout --> may sleep

To fix it, "wait_timeout" is replaced with mdelay in xd_copy_page.

Signed-off-by: Jia-Ju Bai <baijiaju1...@163.com>
Signed-off-by: Amit Pundir <amit.pun...@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/staging/rts5208/xd.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/staging/rts5208/xd.c
+++ b/drivers/staging/rts5208/xd.c
@@ -1095,7 +1095,7 @@ static int xd_copy_page(struct rtsx_chip
                        reg = 0;
                        rtsx_read_register(chip, XD_CTL, &reg);
                        if (reg & (XD_ECC1_ERROR | XD_ECC2_ERROR)) {
-                               wait_timeout(100);
+                               mdelay(100);
 
                                if (detect_card_cd(chip,
                                        XD_CARD) != STATUS_SUCCESS) {