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| Filename | Latest commit message | Latest commit date |
|---|---|---|
cafb56dd74
marvell_nfc_wait_op() waits for completion during 'timeout_ms'
milliseconds before throwing an error. While the logic is fine, the
value of 'timeout_ms' is given by the core and actually correspond to
the maximum time the NAND chip will take to complete the
operation. Assuming there is no overhead in the propagation of the
interrupt signal to the the NAND controller (through the Ready/Busy
line), this delay does not take into account the latency of the
operating system. For instance, for a page write, the delay given by
the core is rounded up to 1ms. Hence, when the machine is over loaded,
there is chances that this timeout will be reached.
There are two ways to solve this issue that are not incompatible:
1/ Enlarge the timeout value (if so, how much?).
2/ Check after the waiting method if we did not miss any interrupt
because of the OS latency (an interrupt is still pending). In this
case, we assume the operation exited successfully.
We choose the second approach that is a must in all cases, with the
possibility to also modify the timeout value to be, e.g. at least 1
second in all cases.
Fixes:
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.