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The function insert_biterror should be designed to insert error at
the first '1' bit starting at offset byte.
But now, only bit 7 of each byte is checked, because checking mask
is always 0x80.
So, do right shift for checking mask after each checking to check
the whole 8 bits of each bytes.
Signed-off-by: Xiaolei Li <xiaolei.li@mediatek.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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When porting some of the mtd-tests to user space, some code was
simplified. Among others, a while loop that iterates of page contents
was replaced with a for loop, but the old increment was left in place,
so every second byte was skipped.
This patch removes the erroneous second increment.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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A common pattern in command line processing is having a usage()
function that prints out how to use the command line options and
then terminates.
The function is typically used inside a switch block for command
line options like `-h' or unknown options. In a lot of places, the
break keyword is omitted, because the function exits anyway. However,
this triggers gcc warnings about implicit fall-through.
Rather than adding a phony "/* fall-through */" this patch flags the
usage() style function with a gcc attribute, indicating that they do
not return and removes further superfluous break statements.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Bit flip detection for written and erased pages tend to have different
implementations. Where written pages are detected and corrected using
ECC, erased pages are typically detected by ensuring that the number of
zeros is less than a specified threshold.
As such, it's necessary to have the 'nandbiterrs' test support the
testing of written and erased pages. Bit flips in erased pages are
emulated by rewriting the page in raw mode, to prevent the use of ECC.
Signed-off-by: Harpreet Eli Sangha <harpreet@nestlabs.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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After a page read, the old failure statistics are compared against the
new failure statistics before the new values are actually read.
Signed-off-by: Harpreet "Eli" Sangha <harpreet@nestlabs.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Basically a user space port of the mtd speed test kernel module.
In addition to the module parameters, the utility can resture
the block contents after test and allows setting the maxium writes
for the test.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Signed-off-by: Richard Weinberger <richard@nod.at>
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