kernel/git/stable/linux.git/drivers/isdn/mISDN/dsp.h, branch master

net: remove ISDN subsystem and Bluetooth CMTP

2026-04-23T17:24:02+00:00

Remove the ISDN (mISDN, CAPI) subsystem and Bluetooth CMTP protocol from the kernel tree. ISDN is a pretty old technology and it's unclear whether anyone still uses it. I went over the last few years of git history and all the commits are either tree-wide conversions or syzbot/static analyzer fixes. When we discussed removal in the past IIRC there were some concerns about ISDN still being used in parts of Germany. Unfortunately, the code base is quite old, none of the current maintainers are familiar with it and AI tools will have a field day finding bugs here. Delete this code and preserve it in an out-of-tree repository for any remaining users: https://github.com/linux-netdev/mod-orphan UAPI constants AF_ISDN/PF_ISDN and the SELinux isdn_socket class are preserved for ABI stability, but the rest of uAPI is removed. Signed-off-by: Jakub Kicinski Acked-by: Greg Kroah-Hartman Acked-by: Stephen Hemminger Acked-by: Luiz Augusto von Dentz Reviewed-by: Simon Horman Link: https://patch.msgid.link/20260421022108.1299678-1-kuba@kernel.org Signed-off-by: Paolo Abeni

mISDN: Update parameter type of dsp_cmx_send()

2023-08-04T01:08:32+00:00

When booting a kernel with CONFIG_MISDN_DSP=y and CONFIG_CFI_CLANG=y, there is a failure when dsp_cmx_send() is called indirectly from call_timer_fn(): [ 0.371412] CFI failure at call_timer_fn+0x2f/0x150 (target: dsp_cmx_send+0x0/0x530; expected type: 0x92ada1e9) The function pointer prototype that call_timer_fn() expects is void (*fn)(struct timer_list *) whereas dsp_cmx_send() has a parameter type of 'void *', which causes the control flow integrity checks to fail because the parameter types do not match. Change dsp_cmx_send()'s parameter type to be 'struct timer_list' to match the expected prototype. The argument is unused anyways, so this has no functional change, aside from avoiding the CFI failure. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-lkp/202308020936.58787e6c-oliver.sang@intel.com Signed-off-by: Nathan Chancellor Reviewed-by: Sami Tolvanen Reviewed-by: Kees Cook Fixes: e313ac12eb13 ("mISDN: Convert timers to use timer_setup()") Link: https://lore.kernel.org/r/20230802-fix-dsp_cmx_send-cfi-failure-v1-1-2f2e79b0178d@kernel.org Signed-off-by: Jakub Kicinski

mISDN: Convert timers to use timer_setup()

2017-10-18T11:39:39+00:00

In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Cc: Karsten Keil Cc: Geliang Tang Cc: "David S. Miller" Cc: Masahiro Yamada Cc: Andrew Morton Cc: Anton Vasilyev Cc: Ingo Molnar Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook Signed-off-by: David S. Miller

mISDN: DSP scheduling fix (version 2)

2012-04-26T07:10:45+00:00

dsp_spl_jiffies need to be the same datatype as jiffies (which is ulong). If not, on 64 bit systems it will fallback to schedule the DSP every jiffie tic as soon jiffies become > 2^32. Signed-off-by: Karsten Keil Signed-off-by: David S. Miller

isdn: whitespace coding style cleanup

2012-02-21T17:04:01+00:00

isdn source code uses a not-current coding style. Update the coding style used on a per-line basis so that git diff -w shows only elided blank lines at EOF. Done with emacs and some scripts and some typing. Built x86 allyesconfig. No detected change in objdump -d or size. Signed-off-by: Joe Perches

Fix common misspellings

2011-03-31T14:26:23+00:00

Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi

mISDN: Fix DTMF detection enable/disable

2009-05-25T07:55:47+00:00

DTMF detection was enabled when it was not supposed to. Signed-off-by: Andreas Eversberg Signed-off-by: Karsten Keil Signed-off-by: David S. Miller

mISDN: Hardware acceleration is now possible in conjunction with audio recording

2009-05-25T07:51:34+00:00

Audio recording requires software audio processing. Both hardware and software processing is simultaniously possible now. Signed-off-by: Andreas Eversberg Signed-off-by: Karsten Keil Signed-off-by: David S. Miller

mISDN: Fix DTMF locking bug issue

2009-05-25T07:51:33+00:00

DTMF digits were sent up to socket in locked state. Receive audio stream was not enabled in certain condition. Signed-off-by: Andreas Eversberg Signed-off-by: Karsten Keil Signed-off-by: David S. Miller

mISDN: Echo canceler now gets delay information from hardware

2009-05-25T07:51:31+00:00

Added tx-fifo information for calculation of current delay to sync tx and rx streams for echo canceler. Signed-off-by: Andreas Eversberg Signed-off-by: Karsten Keil Signed-off-by: David S. Miller