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drivers:misc: ti-st: wait for completion at fail

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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>
This commit is contained in:
Pavan Savoy 2011-08-10 10:18:35 -05:00 committed by Greg Kroah-Hartman
parent 2f81a02ce0
commit d0344ef670
1 changed files with 13 additions and 0 deletions
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13
drivers/misc/ti-st/st_kim.c
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@ -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;