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authorPavan Savoy <pavan_savoy@ti.com>2011-08-10 19:18:35 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2011-08-23 01:13:34 +0400
commitd0344ef670d686628f369e649c86f71c90ebe222 (patch)
tree20dd638b798f38058bb0db756383e743d5332530 /drivers/misc/ti-st
parent2f81a02ce0693863019dc3fcc532533af6dc0dcd (diff)
downloadlinux-d0344ef670d686628f369e649c86f71c90ebe222.tar.xz
drivers:misc: ti-st: wait for completion at fail
When the line discipline install fails for reasons such as missing user-space UIM or broken communication between UIM and ST driver, then the ST attempts/retries to request for ldisc installation again. Signed-off-by: Pavan Savoy <pavan_savoy@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/misc/ti-st')
-rw-r--r--drivers/misc/ti-st/st_kim.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/misc/ti-st/st_kim.c b/drivers/misc/ti-st/st_kim.c
index 1748a9351de0..d8ca4068a928 100644
--- a/drivers/misc/ti-st/st_kim.c
+++ b/drivers/misc/ti-st/st_kim.c
@@ -473,6 +473,12 @@ long st_kim_start(void *kim_data)
pr_info("ldisc_install = 0");
sysfs_notify(&kim_gdata->kim_pdev->dev.kobj,
NULL, "install");
+ /* the following wait is never going to be completed,
+ * since the ldisc was never installed, hence serving
+ * as a mdelay of LDISC_TIME msecs */
+ err = wait_for_completion_timeout
+ (&kim_gdata->ldisc_installed,
+ msecs_to_jiffies(LDISC_TIME));
err = -ETIMEDOUT;
continue;
} else {
@@ -485,6 +491,13 @@ long st_kim_start(void *kim_data)
pr_info("ldisc_install = 0");
sysfs_notify(&kim_gdata->kim_pdev->dev.kobj,
NULL, "install");
+ /* this wait might be completed, though in the
+ * tty_close() since the ldisc is already
+ * installed */
+ err = wait_for_completion_timeout
+ (&kim_gdata->ldisc_installed,
+ msecs_to_jiffies(LDISC_TIME));
+ err = -EINVAL;
continue;
} else { /* on success don't retry */
break;