linux-stable

mirror of https://kernel.googlesource.com/pub/scm/linux/kernel/git/stable/linux-stable.git synced 2025-10-14 23:14:29 +10:00

Go to file

Hamish Martin 77a24b8f3c HID: mcp2221: Handle reads greater than 60 bytes commit `2682468671` upstream. When a user requests more than 60 bytes of data the MCP2221 must chunk the data in chunks up to 60 bytes long (see command/response code 0x40 in the datasheet). In order to signal that the device has more data the (undocumented) byte at byte index 2 of the Get I2C Data response uses the value 0x54. This contrasts with the case for the final data chunk where the value returned is 0x55 (MCP2221_I2C_READ_COMPL). The fact that 0x55 was not returned in the response was interpreted by the driver as a failure meaning that all reads of more than 60 bytes would fail. Add support for reads that are split over multiple chunks by looking for the response code indicating that more data is expected and continuing the read as the code intended. Some timing delays are required to ensure the chip has time to refill its FIFO as data is read in from the I2C bus. This timing has been tested in my system when configured for bus speeds of 50KHz, 100KHz, and 400KHz and operates well. Signed-off-by: Hamish Martin <hamish.martin@alliedtelesis.co.nz> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Fixes: `67a95c2146` ("HID: mcp2221: add usb to i2c-smbus host bridge") [romain.sioen@microchip.com: backport to stable, up to 6.8. Add "Fixes" tag] Signed-off-by: Romain Sioen <romain.sioen@microchip.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2025-09-04 15:26:31 +02:00
arch	KVM: x86: use array_index_nospec with indices that come from guest	2025-09-04 15:26:29 +02:00
block	block: reject invalid operation in submit_bio_noacct	2025-08-28 16:26:10 +02:00
certs
crypto
Documentation	bonding: Add independent control state machine	2025-08-28 16:26:18 +02:00
drivers	HID: mcp2221: Handle reads greater than 60 bytes	2025-09-04 15:26:31 +02:00
fs	smb3 client: fix return code mapping of remap_file_range	2025-09-04 15:26:30 +02:00
include	net: rose: convert 'use' field to refcount_t	2025-09-04 15:26:28 +02:00
init
io_uring	io_uring/poll: fix POLLERR handling	2025-07-24 08:51:48 +02:00
ipc
kernel	dma/pool: Ensure DMA_DIRECT_REMAP allocations are decrypted	2025-09-04 15:26:30 +02:00
lib	maple_tree: fix mt_destroy_walk() on root leaf node	2025-07-17 18:32:09 +02:00
LICENSES
mm	mm/memory-failure: fix infinite UCE for VM_PFNMAP pfn	2025-08-28 16:26:16 +02:00
net	net: rose: fix a typo in rose_clear_routes()	2025-09-04 15:26:30 +02:00
rust
samples	samples: mei: Fix building on musl libc	2025-08-15 12:04:55 +02:00
scripts	kconfig: lxdialog: fix 'space' to (de)select options	2025-08-28 16:26:02 +02:00
security	apparmor: use the condition in AA_BUG_FMT even with debug disabled	2025-08-28 16:26:01 +02:00
sound	ASoC: codecs: tx-macro: correct tx_macro_component_drv name	2025-09-04 15:26:25 +02:00
tools	bonding: Add independent control state machine	2025-08-28 16:26:18 +02:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
.rustfmt.toml
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile	Linux 6.1.149	2025-08-28 16:26:19 +02:00
README

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.