From: pradeepkernel@gmail.com (Pradeep Kumar)
To: kernelnewbies@lists.kernelnewbies.org
Subject: serial: 8250: RX hang issue
Date: Mon, 21 Nov 2011 21:40:29 +0530 [thread overview]
Message-ID: <CAF_AUQ13+10D6yX82LJ2SS3saNd-OebqTk5gm8Wv5q72=w=ACQ@mail.gmail.com> (raw)
Hi All,
I am working on a mobile development platform and performing some stress
warm boot tests using UART debug console(which is using serial 8250 driver
for console).
I am getting device debug console UART RX hang after iterations > 1500.
after this issue am not* able to issue any command. Able to see logs
though.
Later I kept some debug prints in isr and able to see that device is able
to generate interrupts when some data is received. So I came to conclusion
that some malfunctioning is happening in upper layer not sure which layer
has this problem. Can some one give some ideas at which layer I can check?
One more observation is when I perform a open and close calls on debug UART
port(in my case ttyS0) while device is in UART RX hang state, then I notice
the UART console RX again below active and able issue commands from UART
console itself.
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Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-21 16:10 Pradeep Kumar [this message]
2012-01-25 4:41 ` serial: 8250: RX hang issue Peter Teoh
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