Opening device file with O_DIRECT fails on Dream/CM5.0.8

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What steps will reproduce the problem?

1. install SerialPort_0.7.apk (CM5 already has serial port enabled)
2. start SerialPort example, configure it
3. start the console example, it will fail with "The serial port can not be 
opened for an unknown reason"


Problem seems to be in line 96 of SerialPort.c:
> fd = open(path_utf, O_RDWR | O_DIRECT | O_SYNC);
The device file is open()ed using O_DIRECT, which fails on my Dream/CM5.0.8.
Removing O_DIRECT works, but shows another Problem:

At least at my CM image, there seems to be a divisor of 4 configured for the 
ttyMSM2 port. So, when configured to 4800 baud, it will actually use 1200 baud.

This is bad, because from all standard rates, only 1200(4800), 2400(9600) and 
9600(38400) can be used.

Original issue reported on code.google.com by [e-mail] on 22 Jul 2010 at 11:38

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The issue also exists on cm 6.1 on nexus one. Once O_DIRECT is removed, the 
unknown error will no longer occur.

Original comment by [e-mail] on 26 Nov 2010 at 9:40

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I'll look into the O_DIRECT issue.. 
I had a problem with O_DIRECT and also the su on a stock iconia A500 device..

Might try and improve the error reporting in the library..

Original comment by [e-mail] on 16 Aug 2011 at 5:53

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O_DIRECT seems problematic, I will remove it in next release, thanks for the 
report.

Original comment by [e-mail] on 23 Oct 2011 at 9:37

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Original comment by [e-mail] on 25 Oct 2011 at 10:13

• Changed state: Started

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Issue 5 has been merged into this issue.

Original comment by [e-mail] on 25 Oct 2011 at 10:15

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Has this issue been fixed in SerialPort_1.1.apk? I am still having the same 
issue on Gingerbread 3.2.2 "Cannot open port for unknown reason." 

Original comment by [e-mail] on 10 Nov 2011 at 1:35

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O_DIRECT flag has been removed in SerialPort_1.1.apk (maybe in 1.0, I 
forgot...).

Original comment by [e-mail] on 14 Nov 2011 at 5:30

• Changed state: Done