mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-04-30 21:40:37 -04:00
be20b51cfd
Currently, in the query completion trace print, since we use hba->lrb[tag].ucd_req_ptr and didn't differentiate UPIU between request and response, thus header and transaction-specific field in UPIU printed by query trace are identical. This is not very practical. As below: query_send: HDR:16 00 00 0e 00 81 00 00 00 00 00 00, CDB:06 0e 03 00 00 00 00 00 00 00 00 00 00 00 00 00 query_complete: HDR:16 00 00 0e 00 81 00 00 00 00 00 00, CDB:06 0e 03 00 00 00 00 00 00 00 00 00 00 00 00 00 For the failure analysis, we want to understand the real response reported by the UFS device, however, the current query trace tells us nothing. After this patch, the query trace on the query_send, and the above a pair of query_send and query_complete will be: query_send: HDR:16 00 00 0e 00 81 00 00 00 00 00 00, CDB:06 0e 03 00 00 00 00 00 00 00 00 00 00 00 00 00 ufshcd_upiu: HDR:36 00 00 0e 00 81 00 00 00 00 00 00, CDB:06 0e 03 00 00 00 00 00 00 00 00 01 00 00 00 00 Link: https://lore.kernel.org/r/20210105113446.16027-5-huobean@gmail.com Acked-by: Avri Altman <avri.altman@wdc.com> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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.