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e027e72ecc
When e.g. 8 bytes are to be read, sgm->consumed equals 8 immediately after
sg_miter_next() call. The driver then increments it as bytes are read,
so sgm->consumed becomes 16 and this warning triggers in sg_miter_stop():
WARN_ON(miter->consumed > miter->length);
WARNING: CPU: 0 PID: 28 at lib/scatterlist.c:925 sg_miter_stop+0x2c/0x10c
CPU: 0 PID: 28 Comm: kworker/0:2 Tainted: G W 6.9.0-rc5-dirty #249
Hardware name: Generic DT based system
Workqueue: events_freezable mmc_rescan
Call trace:.
unwind_backtrace from show_stack+0x10/0x14
show_stack from dump_stack_lvl+0x44/0x5c
dump_stack_lvl from __warn+0x78/0x16c
__warn from warn_slowpath_fmt+0xb0/0x160
warn_slowpath_fmt from sg_miter_stop+0x2c/0x10c
sg_miter_stop from moxart_request+0xb0/0x468
moxart_request from mmc_start_request+0x94/0xa8
mmc_start_request from mmc_wait_for_req+0x60/0xa8
mmc_wait_for_req from mmc_app_send_scr+0xf8/0x150
mmc_app_send_scr from mmc_sd_setup_card+0x1c/0x420
mmc_sd_setup_card from mmc_sd_init_card+0x12c/0x4dc
mmc_sd_init_card from mmc_attach_sd+0xf0/0x16c
mmc_attach_sd from mmc_rescan+0x1e0/0x298
mmc_rescan from process_scheduled_works+0x2e4/0x4ec
process_scheduled_works from worker_thread+0x1ec/0x24c
worker_thread from kthread+0xd4/0xe0
kthread from ret_from_fork+0x14/0x38
This patch adds initial zeroing of sgm->consumed. It is then incremented
as bytes are read or written.
Signed-off-by: Sergei Antonov <saproj@gmail.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Fixes:
|
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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 reStructuredText 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.